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Dr. Inderjit Chopra

Dr. Inderjit Chopra
Alfred Gessow Professor and
Director, Alfred Gessow Rotorcraft Center and
Dirctor, Microsystems Mechanics Center

Room 3148 Glenn L. Martin Hall
University of Maryland
College Park, MD  20742

(301) 405-1122 TEL
chopra@umd.edu | Vitae | personal website

Research in helicopter dynamics and smart structures

Education

M.E.,  Indian Institute of Science ( Aeronautical Engineering)
Sc.D., Massachusetts Institute of Technology (Aeronautics & Astronautics)

Publications

Bao, J., Chopra, I. and Bernhard, A., “Development of Mach Scale Composite Tailored Rotors with Flap-Bending/Torsion Couplings for Vibration Reduction,” Journal of Aircraft, 2006.

Couch, R. and Chopra, I., “Constitutive Model of NiMnGa Ferromagnetic Shape Memory Alloy Bars” Accepted for Publication in Smart Material and Structures Journal, 2006.

Datta, A. and Chopra, I., “CFD/CSD Coupling for the Prediction of Rotor Vibratory Loads in High-speed Flight, Accepted for Publication in Journal of Aircraft, 2006.

Datta, A. and Chopra, I., “Validation of Structural and Aerodynamic Modeling Using UH-60A Flight Test Data,” Journal of the American Helicopter Society, Vol. 51, No. 1, Jan 2006.

Robbins, D. H. and Chopra, I., "The Effect of Laminate Kinematic Assumptions on the Global Response of Actuated Plates," Publication in Journal of Intelligent Material Systems and Structures, 2006.

Prahlad, H. and Chopra,I., “Development of SMA Torsional Actuators for Active Twist Rotor Blades,” Accepted for Publication in Journal of Intelligent Material Systems and Structures, 2006.

Sirohi, J. and Chopra, I., "Measurement of the Dynamic Response of Piezohydraulic Actuator," Accepted for Publication in Journal of Intelligent Material Systems and Structures, 2006.

Shen, J., Yang, M. and Chopra, I., "Swashplateless Helicopter Rotor System with Active Trailing-Edge Flaps for Primary and Vibrations Controls, Publication in the Journal of Aircraft, 2006.

Sirohi, J.. Cadou, C. and Chopra, I., “Investigation of the Dynamic Characteristics of Piezohydraulic Actuator,” Journal of Intelligent Material Systems and Structures, Vol. 16, No. 6, June 2005, pp. 481-492.

Singh, B. and Chopra, I., “Elastic Blade Whirl Flutter Stability Analysis for Two-Bladed Proprotor/Pylon Systems,” Journal of Aircraft, Vol. 42, No. 2, March-April 2005, pp. 519-527.

Tarascio, M. J., Ramasamy, M., Chopra, I., and Leishman J. G., “Flow Visualization of Micro Air Vehicle Scaled Insect-Based Flapping Wings,” Journal of Aircraft, Vol. 42, No. 2, March-April 2005, pp. 385-390.

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Articles in conference proceedings

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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 2004.

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 2004.

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Honors and Awards

Best Paper Award: “Prediction of UH-60A Dynamic Stall Loads--" Datta, I. and Chopra, AHS Forum 2005 Research

AHS Student Design Competition: First Place, Faculty Advisor Education

Invited Keynote Speaker: 2005 SPIE Fareast International Conference in Smart Structures, July 2005 Research

Keynote Speaker: Indo-US Workshop on Micro Air Vehicle, Bangalore, India, August 2005 Research

Distinguished Speaker:Ist US-European Micro-Aerial Vehicle Technology , Garmisch, Germany, Sept 05

Institutional Services

Minta-Martin Chair Professor Selection Committee ENGR-A. James Clark School of Engineering
Member Engineering Council ENGR-A. James Clark School of Engineering
Director Alfred Gessow Rotorcraft Center ENGR-Aerospace Engineering
Member Department chair Selection Committee ENGR-Aerospace Engineering
Chair Faculty Search committee ENGR-Aerospace Engineering
Faculty Advisor Sigma Gama Tau ENGR-Aerospace Engineering
Member Research Council UMCP - Graduate School
Member Graduate Council UMCP - Graduate School

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