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Dr. Inderjit Chopra
Distinguished University Professor and Alfred Gessow Professor
Director Alfred Gessow
Rotorcraft Center
Aerospace Engineering
University of Maryland
College Park, MD 20742
Ph:  301.405.1122
Fax: 301.314.9001
chopra@umd.edu



 



Publications: Recent Conference Procedings

2015 |2014 |2013 |2012 |2011 |2010 | 2009 | 2008 | 2007 | 2006
2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Archives

2015

  1. Berry, B. and Chopra, I., “Wind Tunnel Testing of an Instrumented Rotor at High Advance Ratio,” AIAA SciTech Conference, Kissimmee, FL, January 2015, Paper AIAA-2015-0950.
  2. Bowen-Davies, G. and Chopra, I., “Aeromechanics of Slowed Rotor at High Advance Ratios,” AIAA SciTech Conference, Kissimmee, FL, January 2015, Paper AIAA-2015-0951.
  3. Schmaus, J. and Chopra, I., “Performance and Loads Prediction for High Advance Ration Coaxial Rotor,” AIAA SciTech Conference, Kissimmee, FL, January 2015, Paper AIAA-2015-1413.
  4. Shrestha, E., Yeo, D., Hrishikeshavan, V. and Chopra, I., “Autonomous Maneuvering of Cyclocopter Using Closed-Loop Motion Capture Feedback Controller,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  5. Hrishikeshavan, V. and Chopra, I., “Refined Lightweight Inertial Navigation System for Micro Air Vehicle Applications,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  6. Shrestha, R., Benedict, M., Hrishikeshavan, V. and Chopra, I., “Performance of Small-Scale Martian Helicopter Rotor,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  7. Winslow, J., Benedict, M., Hrishikeshavan, V. and Chopra, I., “Design, Development, and Flight Testing of a High Endurance Micro Quad-Rotor Helicopter,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  8. Shrestha, E., Martz, V., Chopra, I. and Benedict, M., “Design and Hover Testing of a 50-gram Meso-Cyclocopter,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  9. Lankford, J., Mayo, D. and Chopra, I., “Experimental and Computational Investigation of an Insect-Based Flapping Wing for MAV Applications,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  10. Coleman, D., Benedict, M., Hrishikeshavan, V. and Chopra, I., “Design and Development of a Hover-Capable Two-Winged Flapping-Wing Micro Air Vehicle,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Chandler, AZ, January 2015.
  11. Benedict, M., Lakshminarayan, V. and Chopra, I., “Experimental and Computational Investigation of a Small-Scale Vertical Axis Wind Turbine with Dynamic Blade Pitching,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.
  12. Coleman, D., Benedict, M. and Chopra, I., “Design, Development and Flight Testing of Robotic Hummingbird,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.
  13. Schmaus J. and Chopra, I., “Aeromechanics for a High Advance Ratio Coaxial Helicopter,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.
  14. Staruk, W., Weiner, E. and Chopra, I., “CAD-Based 3-D Structural Dynamic Modeling of the Tilt Rotor Aeroacoustic Model (TRAM) Proprotor,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.
  15. Shrestha, E., Hrishikeshavan, V., Yeo, D. and Chopra, I., “Flight Dynamics Modeling and System Identification of a Cyclocopter in Forward Flight,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.
  16. Bogdanowicz, C., Hrishikeshavan, V. and Chopra, I., “Development of a Quad-Rotor Biplane MAV with Enhanced Roll Control Authority in Fixed Wing Mode,” 71st Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2015.pp

2014

  1. Benedict, M., Winslow, J., Hasnain, Z. and Chopra, I., “Performance and Flow Field Measurements of a MAV-Scale Helicopter Rotor in Hover,” 70th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2014.
  2. Shrestha, E., Benedict, M. and Chopra, I., “Development of Control Strategies and Flight Testing of Twin-Cyclocopter in Forward Flight,” 70th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2014.
  3. Nagaraj, V. T. and Chopra, I., “Exploration of Novel Powerplant Architectures of Hybrid Electric Helicopters,” 70th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2014.
  4. Staruk, W., Chopra, I., and Datta, A., “Three-Dimensional CAD-Based Structural Modeling of Next Generation Rotor Dynamic Analysis,” 70th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2014.
  5. Mayo, D., Lankford, J. and Chopra, I., “Coupled CFD/CSD-Based Aeroelastic Analysis with Flowfield Measurements of Avian-Based Flexible Flapping Wings for MAV Applications,” 70th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2014.
  6. Hrishikeshavan, V., Bogdonowicz, C. and Chopra, I., “Performance and Testing of a Quad Rotor Biplane Micro Air Vehicle for Multi Role Missions,” AIAA SciTech, National Harbor, MD, April 2014.
  7. Bowen-Davier, G. and Chopra, I., “Validation of Rotor Performance and Loads at High Advance Ratio,” Fifth Decennial AHS Aeromechanics Specialists’ Conference, San Francisco, CA, January 2014.
  8. Mayo, D. B., Lankford, J. L., Benedict, M. and Chopra, I., “Experimental and Computational Aerodynamic Investigation of Avian-Based Rigid Flapping Wings for MAV Applications,” Fifth Decennial AHS Aeromechanics Specialists’ Conference, San Francisco, CA, January 2014.
  9. Berry, B. and Chopra, I., “High-Advance Ratio Wind Tunnel Testing of a Model Rotor with Pressure Measurements,” Fifth Decennial AHS Aeromechanics Specialists’ Conference, San Francisco, CA, January 2014.
  10. Berry, B. and Chopra, I., “Slowed Rotor Wind Tunnel Testing of an Instrumented Rotor at High Advance Ratio,” 40th European Rotorcraft Forum, Southampton, UK, Sept 2014.
  11. Bowen-Davies, G. and Chopra, I., “Performance and Loads Correlation of the UH-60 Rotor at High Advance Ratios,” 40th European Rotorcraft Forum, Southampton, UK, Sept 2014.
  12. Nagaraj, V. T. and Chopra, I., “Assessment of Power Sources and Electric Motors for Hybrid Electric Tiltrotors,” 40th European Rotorcraft Forum, Southampton, UK, Sept 2014.

2013

  1. Campbell, R., Humbert, J. S., and Chopra I., “Maneuverability Comparison of Flybar and Flybarless Micro-Helicopters,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, January 2013.
  2. Hrishikeshavan, V., Humbert, J.S., and Chopra, I., "Controllability and Disturbance Gramian Analysis of a Shrouded Rotor Micro Air Vehicle in Hover” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, Jan. 2013.
  3. Zachary, H. A., Benedict, M., Hrishikeshavan, V. and Chopra, I., “Development of a Hover-Capable Cyclogyro Utilizing a Novel Cam-Based Passive Blade Pitching Mechanism,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, January 2013.
  4. Benedict, M., Hrishikeshavan, V. and Chopra, I., “Development of 800 gram Quad-Cyclocopter Capable of Autonomous Hover,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, January 2013.
  5. Malhan, R., Lakshminarayan, V., Masarati, P., Baeder, J. and Chopra, I., “Investigation of Aerodynamics of Flexible Flapping Wings of MAV Applications,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, January 2013.
  6. Jarugumilli, T., Benedict, M. and Chopra, I., “Experimental Investigation of High Speed Flight Capability of the Revolutionary Cycloidal Rotor Concept,” AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Scottsdale, AZ, January 2013.
  7. Benedict, M., Pino, J. and Chopra, I., “Fundamental Understanding of the Physics of a Small-Scale Vertical Axis Wind Turbine with Dynamic Blade Pitching: An Experimental and Computation Approach,” 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, April 2013.
  8. Malhan, R., Masarati, P., Baeder, J. and Chopra, I., “CFD-CSD Coupled Aeroelastic Analysis of Flexible Flapping Wings for MAV Applications,” 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, April 2013.
  9. Benedict, M., Coleman, D., Mayo, D. and Chopra, I., “Force and Flowfield Measurements of a Rigid Wing Undergoing Hover Capable Flapping and Pitching Kinematics in Air at MAV-Scale Reynolds Numbers,” 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, April 2013.
  10. Hrishikeshavan, V., Bagdonowicz, C. and Chopra, I., “Experimental Investigation of Performance of a Wing-Propeller System for a Quad-Rotor-Biplane Micro Air Vehicle,” 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, April 2013.
  11. Chopra, I., Copp, P. and Saxena, A., “Review of Helicopter Primary Control Using Smart Actuators,” 23rd International Conference on Adaptive Structures & Technologies, Nanjing, China, October 2013.
  12. Saxena, A. and Chopra, I., “Continued Work on Hover Testing of a Swashplateless Rotor with Compact Brushless Motor Actuated Flaps for Primary Control,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.
  13. Hrishikeshavan, H., Benedict, M. and Chopra, I., “Flight Dynamics Identification of a Cyclocopter Micro Air Vehicle in Hover,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.
  14. Berry, B. and Chopra, I., “High-Advance Ratio Wind Tunnel Testing of Two Mach-Scale Rotor Geometries,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.
  15. Bowen-Davies, G. and Chopra, I., “Correlation of the UH-60A Slowed Rotor Wind Tunnel Tests Using UMARC,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.
  16. Friedman, C., Rand, O. and Chopra, I., “Obstacle Avoidance and Targeted Flight for Rotary Wing MAVs,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.
  17. Jarugmilli, T., Lind, A. and Chopra, I., “Experimental and Computational Flow Field Studies of a MAV-scale Cycloidal Rotor in Forward Flight,” 69th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2013.

2012

  1. Benedict, M., Shrestha, E., Hrishikeshavan, V. and Chopra, I., “Development of a 200 Gram Twin-Rotor Micro Cyclocopter Capable of Autonomous Hover,” AHS Future Vertical Lift Design Conference, San Francisco, January 2012.
  2. Harrington, A., Kalra, T., Milluzzo, J., Seshadri, P., Nagaraj, V. T. and Chopra, I., “Challenges in Rotor System and Hub Design for a Variable Diameter Tiltrotor,” AHS Future Vertical Lift Design Conference, San Francisco, January 2012.
  3. Ravichandran, K. and Chopra, I., “Active Control of Performance and Vibratory Loads Using Leading Edge Slats,” 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2012.
  4. Benedict, M., Jarugumilli, T. and Chopra, I., “ Studies to Understand the Role of Flow Curvature Effects on the Aerodynamic Performance of MAV-Scale Cycloidal Rotor in Forward Flight,” 53rd AIAA/ASME/ASCE/AHS/AC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2012.
  5. Malhan, R., Lakshminarayan, V., Masarati, P., Baeder, J. and Chopra, I., “CFD-CSD Coupled Aeroelastic Analysis of Flexible Flapping Wings for MAV Applications: Methodology Validation,” 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2012.
  6. Seshadri, P., Benedict, M. and Chopra, I., “Towards a Fundamental Understanding of Low Reynolds Number Hover-Capable Flapping Wing Aerodynamics,” 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2012.
  7. Hrishikeshavan, V., Black, J. and Chopra, I., “Design and Testing of a Quad Shrouded Rotor Micro Air Vehicle in Hover,” 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2012.
  8. Bowen-Davies and Chopra, I., “Aeromechanics of a Variable-Radius Rotor,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  9. Kalra, T. S., Amiraux, M., Nagaraj, V. T. and Chopra, I., “A Comparative Study of Different Weight Formulations Affecting Preliminary Sizing of Rotorcraft,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  10. Hrishikeshavan, V., Black, J. and Chopra, I., “Development of a Quad Shrouded Rotor Micro Air Vehicle and Performance Evaluation in Edgewise Flow,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  11. Hrishikeshavan, V. and Chopra, I., “Design and Testing of a Dual Tilt-Wing Micro Air Vehicle,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  12. Jarugumilli, T. , Benedict, M. and Chopra, I., “Experimental Investigation of the Forward Flight Performance of a MAV Scale Cycloidal Rotor,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  13. Friedmann, C., Rand, O. and Chopra, I., “Highly Accurate SLAM for Rotary Wing MAVs,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  14. Saxena, A. and Chopra, I., “Hover Testing of A Swashplateless Rotor with Compact Brushless Motor Actuated Flaps for Primary Control,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.
  15. Berry, B. and Chopra, I., “Performance and Vibratory Loads of a Slowed Rotor at High Advance Ratios,” 68th Annual Forum of the American Helicopter Society, Fort Worth, TX, May 2012.

2011

  1. Friedman, C., Chopra, I., Rand, O. and Kanza, Y., “Towards Obstacle Avoidance for Autonomous UAV Flying,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  2. Bewak, D. and Chopra, I., “Design, Control, and Performance Verification of a Quad-Rotor MAV,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  3. Harrington, A., Samuel, P. and Chopra, I., “Optimal Design Study of a Micro Quad-Rotor,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  4. Malhan, R., Lakshminarayan, V., Baeder, J. and Chopra, I., “Investigation of Aerodynamics of Rigid Flapping Wings for MAV Applications: CFD Validations,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  5. Benedict, M., Jarugumilli, T. and Chopra, I., “Experimental Investigation of the Effects of Rotor Geometry on the Performance of MAV-Scale Cycloidal Rotor,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  6. Seshadri, P., Benedict, M. and Chopra, I., “Exploring the Insect-Based Aerodynamics for Micro-Air Vehicles,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  7. Hrishikeshavan, V. and Chopra, I., “Performance and Rotor-Based Control of a Shrouded Rotor MAV in Edgewise Flow,” AHS International Specialists’ Meeting, Unmanned Rotorcraft Systems and Network-Centric Operations, Tempe, AZ, January 2011.
  8. Abhishek, A. and Chopra, I., “Validation of UTTAS Pull-Up Maneuver Using CFD/CSD Coupling” 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Denver, CO, April 2011.
  9. Saxena, A. and Chopra, I., “Development and Testing of a Swashplateless Rotor with Compact Brushless Motor Actuated Flaps for Primary Control,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  10. Bowen-Davies, G. and Chopra, I., “Aeromechanics of a Variable-Speed Rotor,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  11. Benedict, M., Gupta, R. and Chopra, I., “Design, Development and Flight Testing of a Twin-Rotor Cyclocopter Micro Air Vehicle,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  12. Sridharan, A., Celi, R. and Chopra, I., “On the Role of Aerodynamic Nonlinearities in Helicopter Sling Load Operations,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  13. Berry, B. and Chopra, I., Wind Tunnel Testing for Performance and Vibratory Loads of a Variable-Speed Mach-Scale Rotor,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  14. Ravichandran, K., Chopra, I., Wake, B. E. and Hein, B., “Active Flaps and Slats for Rotor Performance Enhancement,” 67th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2011.
  15. Gilad, M., Chopra, I. and Rand, O., “Experiments and Theoretical Study of a Flexible Rotor in Extreme Ground Effect,” 37th European Rotorcraft Forum, Gallarate, Italy, September 2011.
  16. Friedman, C., Chopra, I., Potyagaylo, S., Rand, O. and Kanza, Y., “Towards Model-Free SLAM Using a Single Laser Range Scanner for Helicopter MAV,” AIAA Guidance, Navigation, and Control Conference, Portland, Oregon, August 2011.

2010

  1. Jain, R., Yeo, H. and Chopra, I., “An Examination of Dynamic Loads due to On-Blade Active Controls for Performance Enhancement using CFD/CSD Analysis,” American Helicopter Society Specialists’ Conference on Aeromechanics, San Francisco, CA, January 2010.
  2. Hrishikeshavan, V. and Chopra, I., “Development of Closed Loop Flight Control for a Shrouded Rotor Micro Air Vehicle with Anti-Torque Vanes,” American Helicopter Society Specialists’ Conference on Aeromechanics, San Francisco, CA, January 2010.
  3. Benedict, M., Jarugumilli, T. and Chopra, I. “ Experimental Performance Optimization of a MAV-Scale Cycloidal Rotor,” American Helicopter Society Specialists’ Conference on Aeromechanics, San Francisco, CA, January 2010.
  4. Ravichandran, K., Ananthan, S., Chopra, I. and Hein, B., “Active Rotor Controls for Vibration Reduction and Performance Enhancement,” American Helicopter Society Specialists’ Conference on Aeromechanics, San Francisco, CA, January 2010.
  5. Malhan, R., Benedict, M. and Chopra, I., “Experimental Investigation of an Avian-Based Flapping Wing Concept in Hover and Forward Flight for Micro Air Vehicle Applications,” 66th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2010.
  6. Abhishek, A., Ananthan, S., Baeder, J. and Chopra, I., “Prediction and Fundamental Understanding of Stall Loads in UH-60A Pull-Up Maneuver,” 66th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2010.
  7. Hrishikeshavan, V. and Chopra, I., “Flight Testing and Closed Loop Control of a Shrouded Rotor Micro Air Vehicle with Anti Torque Vanes,” 66th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2010.
  8. Benedict, M., Mattaboni, M., Chopra, I., and Masarati, P., "Aeroelastic Analysis of a MAV-Scale Cycloidal Rotor," 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Orlando, FL, April 2010.
  9. Mattaboni, M., Benedict, M., Masarati, P., and Chopra, I., " MAV-Scale Cycloidal Rotor Multibody Aeroelastic Analysis," Presented at the 1st Joint International Conference on Multibody System Dynamics, May 2010, Lappeenranta, Finland.

2009

  1. Hrishikeshavan, V. and Chopra, I., “Development of Closed Loop Flight Control for a Shrouded Rotor Micro Air Vehicle with Anti-Torque Vanes,” AHS International Specialists’ Meeting Unmanned Rotorcraft Systems, Scottsdale, AZ, January 2009.
  2. Benedict, M., Chopra, I., Ramassamy, M. and Leishman, G. J., “Experiments of Optimization of MAV-Scale Cycloidal Rotor Characteristics towards Improving their Aerodynamic Performance,” AHS International Specialists’ Meeting Unmanned Rotorcraft Systems, Scottsdale, AZ, January 2009.
  3. Seshadri, P., Benedict, M. and Chopra, I., “Understanding Insect=-Based Flapping Flight from Micro Air Vehicle Perpective,” AHS International Specialists’ Meeting Unmanned Rotorcraft Systems, Scottsdale, AZ, January 2009.
  4. Abhishek, A., Datta, A. and Chopra, I., Comprehensive Analysis, Prediction, and Validation of UH-60A Blade Loads in Unsteady Maneuvering Flight,” 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Palm Springs, CA, May 2009, AIAA-2009-2466.
  5. Benedict, M., Tarugumilli, T. and Chopra, I., “Design and Development of Hover-Capable Cyclocopter Micro Air Vehicle,” 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 2009.
  6. Pereira, J., Bawek, D., Westfall, S. and Chopra, I., “Design and Development of a Quad-Shrouded-Rotor Micro Air Vehicle,” 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 2009.
  7. Jain, R., Szema, K., Munipalli, R., Yeo, H. and Chopra, I., “Coupled CFD/CSD Prediction of the Effects of Leading Edge Slat on Rotor Performance,” 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 2009.
  8. Silbaugh, B., Abhishek, A., Ananthan, S., Baeder, J. and Chopra, I., Aerodynamic and Structural Rotor Loads During Maneuvering Flight using Coupled CFD/CSD Analysis,” 65th Annual Forum of the American Helicopter Society, Grapevine, TX, May 2009.
  9. Sirohi, J. and Chopra, I., “Overview of Piezoelectric Actuator and Sensor Technology,” International Conference on Adaptive Structures and Technologies, Hong Kong, October 2009.
  10. Hrishikehavan, V. and Chopra, I., “Design, Development and Flight Testing of a Shrouded Rotor Micro Air Vehicle with Anti-Torque Vanes,” 3rd International Basic Research Conference on Rotorcraft Technology, Nanjing, China, October 2009.
  11. Abhishek, A., Silbaugh, B., Ananthan, S., Baeder, J. and Chopra, I., “CFD/CSD Analysis of a Prescribed Pull-up Maneuver,” 3rd International Basic Research Conference on Rotorcraft Technology, Nanjing, China, October 2009.

2008

  1. Jung, S. N., Park, I., Nagaraj, V. T. and Chopra, I., “Structural Dynamics Analysis of Thin-Walled, Pretwisted Composite Blades with Spanwise Taper,” 49th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Schaumburg, Illinois, April 2008.
  2. Abhishek, A., Chopra, I., and Datta, A., “Comprehensive Analysis, Prediction, and Validation of UH-60A Blade Loads in Unsteady Maneuvering Flight,” AHS Specialists’ Conference on Aeromechanics, San Francisco, January 2008.
  3. Falls, J., Chopra, I. and Datta, A., “Performance Analysis of Trailing-Edge Flaps in Helicopter Primary Control,” AHS Specialists’ Conference on Aeromechanics, San Francisco, January 2008.
  4. Hrishkeshavan, V. and Chopra, I., “Design and Testing of a Shrouded Rotor Micro Air Vehicle with Anti Torque Vanes,” 64th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2008.
  5. Copp, P. and Chopra, I., “Continued Development of a Mach Scale Swashplateless Rotor with Integrated Trailing Edge Flaps,” 64th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2008.
  6. Benedict, M., Chopra, I., Ramasamy, M., and Leishman, J. G., “Experimental Investigation of the Cycloidal-Rotor Concept for a Hovering Micro Air Vehicle,” 64th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2008.
  7. Medic, C., Nagaraj, V., Chopra, I., “Novel Rotorcraft Automated Blade Fold and Secure Design,” 64th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2008.
  8. Nagaraj, V. and Chopra, I., “Design of Helicopter Based Urban Disaster Rescue Module,” 64th Annual Forum of the American Helicopter Society, Montreal, Canada, May 2008.
  9. Chopra, I., “Rotor-Based Micro Air Vehicles: Challenges & Opportunities,” 1st US-Asian Demonstration and Assessment of Micro-Aerial and Unmanned Ground Vehicles Technologies, Agra, India, March 2008.
  10. Copp, P. and Chopra, I., “Piezobimorph Actuated Trailing Edge Flaps for Primary Helicopter Control,” International Conference on Adaptive Structures and Technologies, Ascona, Switzerland, October 2008.

2007

  1. Harishikeshavan, V., Sirohi, J., Tishchenko, M. and Chopra, I., “Design of a Shrouded Rotor Micro Air Vehicle wit Anti-Torque Vanes,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  2. Pereiera, J. and Chopra, I., “Forward Flight Performance Measurements of a Shrouded Rotor for MAV Applications,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  3. Benedict, M., Sirohi, J. and Chopra, I., “Design and Testing of a Cycloidal-Rotor MAV,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  4. Fitchett, B. and Chopra,I., “A Biological Inspired Flapping Rotor for Micro Air Vehicles,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  5. Gupta, N., Copp, P. and Chopra, I., “Flight Dynamics Model for Pitch and Heave Motion of a Rotary Wing Micro Air Vehicle,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  6. Singh, B. and Chopra, I., “Aeroelastic Analysis of Insect-Based Hover-Capable Flapping Wings,” AHS International Specialists’ Meeting on Unmanned Rotorcraft, Chandler, AZ, January 2007.
  7. Falls, J., Datta, A. and Chopra, I., “Design and Analysis of Trailing-Edge Flaps and Servotabs for Primary Control,” Proceedings of 63rd Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2007.
  8. Abhishek, A., Datta, A. and Chopra, I., “Comprehensive Analysis, Prediction, and Validation of UH-60A Blade Loads in Unsteady Maneuvering Flight,” Proceedings of 63rd Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2007.
  9. Pereira, J. and Chopra, I., “Performance and Surface Measurements on a MAV-Scale Shrouded Rotor in Translational Flight,” Proceedings of 63rd Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2007.
  10. Singh, B. and Chopra, I., “An Aeroelstic Analysis for the Design of Insect-Based Flapping Wings,” AIAA 2007-1757, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2007.
  11. Nagaraj, V. T. and Chopra, I., “Analysis of Elastically Coupled Non-Uniform Thin-Walled Composite Beams with Pre-Twist and Taper,” AIAA 2007-2261, 48th AIAA/ASME/ASCE /AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2007.
  12. Allen, K., Sirohi, J. and Chopra, I., “Development of a Mach-Scaled Swashplateless Rotor with Embedded Trailing-Edge Flaps,” 33rd European Rotorcraft Forum, Kazan Russia, Sept 2007.
  13. Chopra, I., “Hovering Micro Air Vehicles: Challenges and Opportunities,” Proceedings of American Helicopter Society Specialists’ Conference, International Forum on Rotorcraft Multidisciplinary Technology, October 15-17, 2007, Seoul, Korea
  14. Jung, S. N., Park, I., Yu, H. Y., Nagaraj, V. T. and Chopra, I., “Theory of Thin-Walled, Pretwisted Composite Blades,” Proceedings of American Helicopter Society Specialists’ Conference, International Forum on Rotorcraft Multidisciplinary Technology, October 15-17, 2007, Seoul, Korea.

2006

  1. Nagaraj, V. T. and Chopra, I., “Assessment of Tip Driven and Shaft Driven Rotors for Heavy Lift Applications,” Proceedings of the AHS Vertical Lift Aircraft Design Conference, San Francisco, CA, January 2006.
  2. Couch, R., Sirohi, J. and Chopra, I., “Testing and Modeling of NiMnGa Ferromagnetic Shape Memory Alloy for Static and Dynamic Loading Conditions,” Proceedings of the SPIE's 13th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2006.
  3. Singh, B. and Chopra, I., “Dynamics of Insect-Based Flapping Wings: Loads Validation,” AIAA 2006- 1663,47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Newport, RI, April 2006.
  4. Pereira, J. and Chopra, I., “Pressure Measurements on the Shrouded Surface of MAV-Scale Shrouded Rotors,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  5. Beasley, B. and Chopra, I., “Planar and Nonplanar Membrane Wing Planform for the Design of a Flapping-Wing Micro Air Vehicle,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  6. Abhishek, A., Datta, A. and Chopra, I., “Prediction of UH-60A Structural Loads Using Multibody Analysis and Swashplate Dynamics,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  7. Falls, J., Datta, A. and Chopra, I., “Integrated Trailing-Edge Flaps and Servotabs for Helicopter Primary Control,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  8. Sirohi, J., Parsons, E. and Chopra, I., “Cycloidal Rotor Micro Air Vehicle,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  9. Bao, J., Allen, K. and Chopra, I., “Design and Test of A Mach Scale Swashplateless Rotor Using Smart Trailing-Edge Flaps,” Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  10. Brindejonc, A., Sirohi, J. and Chopra, I., “Design and Testing of an Autorotative Payload Delivery System", Proceedings of 62nd Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2006.
  11. Datta, A. and Chopra, I., “Prediction of UH-60 Vibratory Loads at Three Critical Level Flight Conditions,” 32nd European Rotorcraft Forum, Maastricht, Netherlands, September 2006

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2005

  1. Hein, B. and Chopra, I., “Hover Performance of a Micro Air Vehicle: Rotor at Low Reynolds Number,” AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Phoenix, AZ, January 2005.
  2. Pereira, J. and Chopra, I.. “An Investigation of the Effects of Shroud Design Variables on the Hover Performance of a Shrouded-Rotor Micro Air Vehicles,” AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Phoenix, AZ, January 2005.
  3. Singh, B., Chopra, I., Ramasamy, M. and Leishman, J. G., “Insect-Based Flapping Wings for Micro Hovering Air Vehicles: Experimental Investigation,” AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Phoenix, AZ, January 2005.
  4. Parson, E., Sirohi, J. and Chopra, I., “Micro Air Vehicle: Cycloidal Rotor Concept,” AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Phoenix, AZ, January 2005.
  5. Couch, R. N. and Chopra, I., “Quasi-Steady Modeling of NiMnGa Magnetic Shape Memory Alloy,” SPIE's 12th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2005.
  6. Ellison, J, Sirohi, J. and Chopra, I., “Comparison of Piezoelectric and Magnetostrictive Hydraulic Hybrid Actuators,” SPIE's 12th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2005.
  7. Singh, B. and Chopra, I., “Aerodynamics of Insect-Based Flapping Wings for Micro Hovering Air Vehicles,” AIAA-2005-2293, 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Austin, TX, April 2005.
  8. Falls, J. and Chopra, I., Piezobimorph Actuated Servotab for Controlling a Trailing-Edge Flap for Rotor Vibration Suppression,” AIAA-2005-1961, 13th AIAA/ASME/AHS Adaptive Structures Conference, Austin, TX, April 2005.
  9. Nagaraj, V. and Chopra, I., “Assessment of Helicopter Wire Strike Accidents and Safety Warning and Protection Devices,” Proceedings of 61st Annual Forum of the American Helicopter Society, Grapevine, TX June 2005.
  10. Datta, A. and Chopra, I., “Prediction of UH-60A Dynamic Stall Loads in High Altitude Level Flight Using CFD/CSD Coupling,” Proceedings of 61st Annual Forum of the American Helicopter Society, Grapevine, TX June 2005.
  11. Roget, B. and Chopra, I., “Closed-Loop Test of a Rotor with Individually Controlled Trailing-Edge Flaps for Vibration Reduction,” Proceedings of 61st Annual Forum of the American Helicopter Society, Grapevine, TX June 2005.
  12. Sirohi, J., Tishchenko, M. and Chopra, I., “Design and Testing of a Micro-Aerial Vehicle with a Single Rotor and Turning Vanes,” Proceedings of 61s Annual Forum of the American Helicopter Society, Grapevine, TX June 2005.
  13. Brindejonc, A., Sirohi, J. and Chopra, I., “Design and Flight Testing of an Autonomous Payload Delivery System: The Autobody,” Proceedings of 61st Annual Forum of the American Helicopter Society, Grapevine, TX June 2005.
  14. Datta, A., Nixon, M. and Chopra, I., “Prediction of Rotor Loads with the Emergence of Rotorcraft CFD,” Proceedings of 31st European Rotorcraft Forum, , Italy, September 2005.
  15. Bao, J., Falls, J. and Chopra, I., “Development of a Swashplateless Rotor,” Proceedings of 2nd International Basic Research Conference on Rotorcraft Technology, Nanjing, China, November 2005.
  16. Robbins, D. H. and Chopra, I., “The Effect of Laminate Kinematic Assumption on the Global Response of Actuated Plates,” 16th International Conference on Adaptive Structures and Technologies, Paris, France, October 2005.

2004

  1. Roget, B. and Chopra, I., “Development and Testing of an Individual Blade Control Algorithm for Vibration Reduction of a Dissimilar Rotor,” AHS 4th Decennial Specialists’ Conference on Aeromechanics, San Francisco, CA, January 2004.
  2. Atulsimha, J., Flatau, A. B. and Chopra, I., “Effect of Stoichiometry on the Behavior of Iron-Gallium,” SPIE's 11th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2004.
  3. Falls, J. and Chopra, I., “Design and Testing of a Servotab Actuated Trailing-Edge Flap for Rotor Vibration Suppression,” SPIE's 11th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2004.
  4. Ellison, J. A. and Chopra, I., “Design and Testing of Bidirectional Magnetostrictive-hydraulic Hybrid Actuator,” SPIE's 11th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2004.
  5. Couch, R. N. and Chopra, I., “Quasi-Static Modeling of NiMnGa Magnetic Shape Memory Alloy,” SPIE's 11th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2004.
  6. Sirohi, J., Nagaraj, V. T. and Chopra, I., “Design and Testing of a Hingeless Rotor for Autonomous Autorotation,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  7. Pereira, J. and Chopra, I., “Hover Performance of a Small-Scale Shrouded Rotor for Micro Air Vehicle,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  8. Bao, J, Chopra, I. and Bernhard, A., “Wind Tunnel Testing of Low Vibration Mach Scale Rotor with Composite Tailored Blades,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  9. Singh, B. and Chopra, I., “Wing Design and Optimization for a Flapping Wing Micro Air Vehicle,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  10. Shen, J. and Chopra, I., “Swashplateless Trailing-Edge Flap Helicopter Rotor in Maneuvering and Autorotative Flights,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  11. Datta, A., Sitaraman, J., Chopra, I., and Baeder, J., “Improved Comprehensive Analysis for Prediction of Rotor Vibratory Loads in High-Speed Forward Flight,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  12. Roget, B. and Chopra, I., “Development and Testing of an Individual Blade Control Algorithm for Vibration Reduction of a Dissimilar Rotor,” Proceedings of 60th Annual Forum of the American Helicopter Society, Baltimore, MD, June 2004.
  13. Shen, J. and Chopra, I., “A Swashplateless Helicopter Rotor System with Trailing-Edge Flaps for Primary and Vibration Control,” 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Palm Springs, CA, April 2004.
  14. Couch, R., Sirohi, J. and Chopra, I., “A Comprehensive Quasi-Static Model for NiMnGa Magnetic Shape Memory Alloy,” 15th International Conference on Adaptive Structures and Technologies, Bar Harbor, Maine, October 2004.

2003

  1. Yoo, J., Sirohi, J., Wereley, N. M. and Chopra, I., “Magnetorheological Hydraulic Actuator Driven by a Piezoelectric Pump,” SPIE's 10th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2003.
  2. Couch, R. N. and Chopra, I., “Experimental Characterization of NiMnGa Magnetic Shape Memory Alloy Rods under Dynamic Magnetic Field,“ SPIE's 10th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2003.
  3. Atulsimha, J. and Chopra, I., “Testing of Torsional SMA Actuator in a Rotating Environment for a Variable Twist Tiltrotor Blade,” 11h AIAA/ASME/AHS/ Adaptive Structures Conference, Norfolk, VA, April 2003.
  4. Sirohi, J. Cadou, C. and Chopra, I., “Performance Modeling of a Piezohydraulic Actuator,” 11h AIAA/ASME/AHS/ Adaptive Structures Conference, Norfolk, VA, April 2003.
  5. Bao, J, Nagaraj, V. T., Chopra, I. and Bernhard, A., “Design and Hover Test of Low Vibration Mach Scale Rotor with Twisted Composite Tailored Blade,” 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Norfolk, VA, April 2003.
  6. Singh, B. and Chopra, I., “A Comprehensive Aeroelastic Analysis for Two-Bladed Tiltrotors,” 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Norfolk, VA, April 2003.
  7. Tarascio, M. J. and Chopra, I., “Design and Development of a Thrust Augmented Entomopter: An Advaned Flapping Wing Micro Hovering Air Vehicle,” Proceedings of 59th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2003.
  8. Shen, J., Chopra, I. and Johnson, W., “Evaluation of Trailing-Edge Flaps for Simultaneous Primary Controls and Vibration Minimization of an Ultralight Helicopter,” Proceedings of 59th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2003.
  9. Datta, A. and Chopra, I., “Validation of Structural and Aerodynamic Modeling Using UH-60 Flight Test Data,” Proceedings of 59th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2003.
  10. Sitaraman, J., Baeder, J. and Chopra, I., “Validation of UH-60 Rotor Blade Aerodynamic Characteristics Using CFD,” Proceedings of 59th Annual Forum of the American Helicopter Society, Phoenix, AZ, May 2003.
  11. Sitaraman, J., Datta, A., Baeder, J. and Chopra, I., “Fundamental Understanding and Prediction of Rotor Vibratory Loads in High-Speed Forward Flight,” Proceedings of 29th European Rotorcraft Forum, Friedrichshafen, Germany, September 2003.
  12. Sirohi, J. and Chopra, I., “Measurement of the Dynamic Response of Piezohydraulic Actuator,” 14th International Conference on Adaptive Structures and Technologies, Seoul National University, Seoul, Korea, October 2003.
  13. Yoo, J. Sirohi, J., Wereley, N. and Chopra, I., “A Hybrid MR Piezohydraulic Actuator,” 14th International Conference on Adaptive Structures and Technologies, Seoul National University, Seoul, Korea, October 2003.

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2002

  1. K. Singh and Chopra, I., “Design of an Improved Shape-Memory Alloy Actuated In-Flight Tab Deflection Mechanism for Helicopter Rotor Blades,” SPIE's 9th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2002.
  2. Sirohi, J. and Chopra, I., “Design and Testing of a High Pumping Frequency Piezoelectric hydraulic Hybrid Actuator,” SPIE's 9th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2002.
  3. Couch, R., Chopra, I. and Wuttig, M. R., “Experimental Characterization of NiMnGa Ferromagnetic Shape Memory Alloy Rods Under Variable Loading Conditions,” SPIE's 9th Annual International Symposium on Smart Structures and Materials, San Diego, Calif., March 2002.
  4. Shen, J. and Chopra, I., “Actuation Requirements for a Swashplateless Helicopter Control System,” 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Denver, CO, April 2002.
  5. Prahlad, H. and Chopra,I., “Development of SMA Torsional Actuators for Active Twist Rotor Blades,” 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Denver, CO, April 2002.
  6. Roget, B. and Chopra, I., “Methodology for Individual Blade Control (IBC) of Helicopter with a Dissimilar Rotor,” 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Denver, CO, April 2002.
  7. Singh, B. and Chopra, I., “Aeroelastic Stability of Two-Bladed Propellor/Pylon Systems in High Speed Flight,” 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Denver, CO, April 2002.
  8. Bao, J., Chopra, I. and Bernhard, A., “Development of a Low Vibration Mach Scaled Rotor with Composite Couplings,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  9. Shen, J. and Chopra, I., “Stability and Loads of a Swashplateless Rotor with Smart Flaps,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  10. Datta, A. and Chopra, I., “Validation and Understanding of UH-60A Vibration Loads in Steady Level Flight,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  11. Prahlad, H. and Chopra, I., “Development of a Shape Memory Alloy Torsional Actuator for Active Twist of a Tilt Rotor Blade,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  12. Yang, M., Chopra, I. and Haas, D., “Sensitivity of Rotor Fault Induced Vibrations of Operational and Design Parameters,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  13. Nagaraj, V. T. and Chopra, I., “Consideration for High Speed Flight of Compound Helicopters,” Proceedings of 58th Annual Forum of the American Helicopter Society, Montreal, Canada, June 2002.
  14. Roget, B. and Chopra, I., “Methodology for Individual Blade Control (IBC) of Helicopter with a Dissimilar Rotor,” Proceedings of 28th European Rotorcraft Forum, Bristol, UK, October 2002.
  15. Shen, J. and Chopra, I., “Ultralight Helicopter with Trailing-Edge Flap for Primary Controls,” Proceedings of AHS Technical Specialists’ Meeting on Advanced Rotorcraft Technology and Life Saving Activities, Utsunomiya, Japan, November 2002.
  16. Sirohi, J. and Chopra, I., “Design and Testing of High Pumping Frequency Piezoelectric-Hydraulic Hybrid Actuator,” International Conference on Adaptive Structures and Technologies, Potsdam, Germany, October 2002.

2001

  1. Koratkar, N. and Chopra, I., “Wind Tunnel Testing of Mach-Scaled Active Flap Rotor,” 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Seattle, WA, April 2001.
  2. Roget, B. and Chopra, I., “Trailing-Edge Flap Control Methodology for Vibration Reduction of Helicopter with Dissimilar Blades,” 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Seattle, WA, April 2001.
  3. Shen, J. and Chopra, I., “Coupled Aeroelastic Stability of Trailing-Edge Flap Rotor with Smart Actuators,” 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Seattle, WA, April 2001.
  4. Chopra, I., “Review of State-of-Art of Smart Structures and Integrated Systems,” ASME Adaptive Structures and Material Systems Prize Lecture, 42nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Seattle, WA, April 2001.
  5. Lee, T. and Chopra, I., “Design of a Bidirectional Piezoelectric Actuator for Blade Trailing-Edge Flap,” SPIE's 8th Annual International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2001.
  6. Sirohi, J. and Chopra, I., “Development of a Compact Piezoelectric-Hydraulic Hybrid Actuator,” SPIE's 8thAnnual International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2001.
  7. Prahlad, H. and Chopra, I., “Design of Variable Twist Tiltrotor Blade Using SMA Actuators,” SPIE's 8th International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2001.
  8. Yang, M., Chopra, I. and Haas, D. J., “Rotor-Fuselage Analysis for a Dissimilar Rotor with Single and Multiple Faults,” Proceedings of 57th Annual Forum of the American Helicopter Society, Washington DC, May 2001.
  9. Koratkar, N. and Chopra, I., “Wind Tunnel Testing of a Mach-Scaled Rotor Model with Trailing-Edge Flaps,” Proceedings of 57th Annual Forum of the American Helicopter Society, Washington DC, May 2001.
  10. Lee, T. and Chopra, I., Wind Tunnel Test of Blade Sections with Piezoelectric Trailing-Edge Flap Mechanism,” Proceedings of 57th Annual Forum of the American Helicopter Society, Washington DC, May 2001.
  11. Koratkar, N. and Chopra, I., “Wind Tunnel Testing of a Smart Rotor with Trailing Edge Flaps,” International Conference on Adaptive Structures and Technologies, College Park, MD, October 2001.
  12. Prahlad, H. and Chopra, I., “Shape Memory Alloy Torsional Actuators for Variable Twist Tiltrotor Blades,” International Conference on Adaptive Structures and Technologies, College Park, MD, October 2001.
  13. Sirohi, J. and Chopra, I., “Compact Piezo-Hydraulic Hybrid Actuators,” International Conference on Adaptive Structures and Technologies, College Park, MD, October 2001.

2000

  1. Koratkar, N. and Chopra, I., “Hover Testing of a Mach-Scaled Rotor Model with Trailing-Edge Flaps,” SPIE's 6th International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2000.
  2. Lee, T. and Chopra, I., “Development of a Smart Trailing-Edge Flap Actuator with Multistage Stroke Amplifier,” SPIE's 6th International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2000.
  3. Spencer, M. G., Sanner, R. M. and Chopra, I., “Closed-Loop Hover Test Results with a Neuro-Controller on a Piezo-Actuated Smart Rotor Blades,” SPIE's 6th International Symposium on Smart Structures and Materials, Newport Beach, Calif., March 2000.
  4. Shen, J. and Chopra, I., “Aeroelastic Modeling of Trailing-Edge Flaps with Smart Material Actuators,” 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Atlanta, GA, April 2000.
  5. Prahlad, H. and Chopra, I., “Development of an Adaptive Flexbeam for Rotorcraft Using Embedded Shape Memory Alloys (SMA),” 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Atlanta, GA, April 2000.
  6. Sirohi, J. and Chopra, I., “Actuator Power Reduction Using Tuned L-C Oscillator Circuits,” 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference and Adaptive Structures Forum, Atlanta, GA, April 2000.
  7. Koratkar, N. and Chopra, I., “Hover and Wind Tunnel Testing of a Mach-Scaled Rotor Model with Trailing-Edge Flaps,” 56th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2000.
  8. Bernhard, A. P. and Chopra, “Mach-Scale Testing of a Rotor-Model with Active Blade Tips,” 56th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2000.
  9. Yang, M. and Chopra, I., “Rotor System Health Monitoring Using Coupled Rotor-Fuselage Vibration Analysis,” 56th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2000.
  10. Epps, J. and Chopra, I., “in-flight Tracking of Helicopter Rotor Blades with Tabs Using Shape Memory Alloy Actuators, 56th Annual Forum of the American Helicopter Society, Virginia Beach, VA, May 2000.
  11. Chopra, I., “Recent Progress on the Development of a Smart Rotor System,” Proceedings of the 26th European Rotorcraft Forum, Hague, Neatherlands, Sept. 2000.
  12. Koratkar, N. and Chopra, I., “Development of an Active Rotor Blade with Trailing-Edge Flaps,” AHS Northeast Region Technical Specialists’ Meeting on Improving Rotorcraft Acceptance Through Active Control Technology, Bridgeport, CT, October 2000.
  13. Shen, J. and Chopra, I., “Coupled Aeroelastic Stability of a Trailing-Edge Flap Rotor with Smart Actuators,” AHS Northeast Region Technical Specialists’ Meeting on Improving Rotorcraft Acceptance Through Active Control Technology, Bridgeport, CT, October 2000.
  14. Bernhard, A. P. F. and Chopra, I., “Hover Test of an Active-Twist, Mach-Scale Rotor using a Piezo-Induced Bending-Torsion Actuator Beam,” AHS Northeast Region Technical Specialists’ Meeting on Improving Rotorcraft Acceptance Through Active Control Technology, Bridgeport, CT, October 2000.
  15. Lee, T. and Chopra, I., “Wind Tunnel and Vacuum Chamber Testing of a Piezoelectric Double-Lever Actuator for Trailing-Edge Flap Control,” AHS Northeast Region Technical Specialists’ Meeting on Improving Rotorcraft Acceptance Through Active Control Technology, Bridgeport, CT, October 2000.
  16. Prahlad, H., Epps, J. J. and Chopra, I., “In-Flight Tracking of Helicopter Rotor Blades Using Shape Memory Alloy Actuators,” AHS Northeast Region Technical Specialists’ Meeting on Improving Rotorcraft Acceptance Through Active Control Technology, Bridgeport, CT, October 2000.
  17. Chopra, I., “Update on Developments in Application of Smart Structures Technology to Rotorcraft Systems,” International Conference on Adaptive Structures and Technologies, Nagoya, Japan, October 2000.

Papers Presented at Symposia and Seminars

Many papers have been presented at symposia, workshops, invited conferences, and seminars. These typically range 5 - 10 per year. To save space, these are not included.

For years prior to 2000, see Conference Archives

For Journals, See Recent Journals

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