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Conference Proceedings

  1. Uehara, D., Sirohi, J., and Matthies, L., “Flight Power Modeling of VTOL Aircraft for Exploration of Titan”, Vertical Flight Society 75th annual forum, Philadelphia, PA, May 2019.
  2. Mortimer, P., Sirohi, J., Platzer, S., and Rauleder, J., “Coaxial Rotor Wake Measurements in Hover Using Phase-Resolved and Time-Resolved PIV”, Vertical Flight Society 75th annual forum, Philadelphia, PA, May 2019.
  3. Uehara, D., and Matthies, L., “Energy Modeling of VTOL Aircraft for Titan Aerial Daughtercraft (TAD) Concepts”, IEEE Aerospace Conference 2019, Big Sky, MT, March 2019.
  4. Uehara, D., Johnson, C., and Sirohi, J., “Transient Blade Deformation and Loads Measurement of a Coaxial Rotor System”, AIAA SciTech Forum and Exposition, San Diego, CA, January 2019.
  5. Uehara, D., Sirohi, J., Feil, R., and Rauleder, J., “Measurement of Transient Blade Passage Loads of a Coaxial Counter-Rotating Rotor in Hover”, 44th European Rotorcraft Forum, Delft, The Netherlands, September 2018.
  6. Uehara, D., Eitner, M., and Sirohi, J., “Automated Operational Modal Identification of a Rotor Blade”, AHS International 74th Annual Forum, Phoenix, Arizona, May 2018.
  7. Uehara, D., Cameron, C., and Sirohi, J., “Deformation Measurement and Modal Identification of an Extremely Flexible Rotor Blade”, 6th Asian-Australian Rotorcraft Forum/Heli Japan, Kanazawa, Japan, Nov. 2017.
  8. Uehara D., and Sirohi J., “Quantification of Swirl Recovery in a Coaxial Rotor System”, AHS International 73rd Annual Forum, Fort Worth, Texas, USA, May 9-11, 2017.
  9. Cameron C., Sirohi J., Feil R., and Rauleder J., “Measurements of Transient Blade Loads and Deformations in a Coaxial Counter-Rotating Rotor”, AHS International 73rd Annual Forum, Fort Worth, Texas, USA, May 9-11, 2017.
  10. Hill B., Tinney C., and Sirohi J., “The Acoustics of Drones”, AHS International 73rd Annual Forum, Fort Worth, Texas, USA, May 9-11, 2017.
  11. Tran J., and Sirohi J., “Measurement of Flapping Wing Deformation and Loads Using Piezoelectric Modal Sensors”, 55th AIAA Aerospace Sciences Meeting, Grapevine, Texas, 9-13 January 2017.
  12. Gray M., Choi Y-J., Sirohi J., and Raja L., “Experimental Investigation of the Internal Structure and Dynamic Behavior of the Rail Plasma Actuator Arc”, 55th AIAA Aerospace Sciences Meeting, Grapevine, Texas, 9-13 January 2017.
  13. Tran J., Cameron C., and Sirohi J., “Measurement Of Flapping Wing Deformation Using Piezoelectric Modal Sensors”, SMASIS2016-9160, Proceedings of the ASME 2016 Conference on Smart Materials, Adaptive Structures and Intelligent Systems SMASIS2016, September 28-30, 2016, Stowe, VT, USA.
  14. Feil R., Rauleder J., Hajek M., Cameron C. and Sirohi J., “Computational and Experimental Aeromechanics Analysis of a Coaxial Rotor System in Hover and Forward Flight” 42nd European Rotorcraft Forum, Lille, France, September 6–8, 2016.
  15. Cameron C., and Sirohi J., “Performance and Loads of a Model Coaxial Rotor Part I: Wind Tunnel Measurements”, AHS International 72nd Annual Forum, West Palm Beach, Florida USA, May 17-19, 2016.
  16. Min B-Y., Karpatne A., Sargent C., Shannon D., Sirohi J., and Wake B., “Numerical and Experimental Study of Centrifugally-Driven Flow inside a Rotating Duct for Rotorcraft Application”, AHS International 72nd Annual Forum, West Palm Beach, Florida USA, May 17-19, 2016.
  17. Rizo-Patron S. S., and Sirohi J., “Operational Modal Analysis of a Rotating Cantilever Beam Using High-Speed Digital Image Correlation”, AIAA Paper 2016-1957, 54th AIAA Aerospace Sciences Meeting, San Diego, California, 4-8 January 2016.
  18. Singh R., Kang H., Bhagwat M., Cameron C. and Sirohi J., “Computational and Experimental Study of Coaxial Rotor Steady and Vibratory Loads”, AIAA Paper 2016-1787, 54th AIAA Aerospace Sciences Meeting, San Diego, California, 4-8 January 2016.
  19. Choi Y-J., Gray M., Sirohi J. and Raja L. L., “Experimental Study of a Magnetohydrodynamic Plasma Actuator in Quiescent Atmospheric Air”, AIAA Paper 2015-1964, 53rd AIAA Aerospace Sciences Meeting, Kissimmee, Florida, 5-9 January 2015.
  20. Cameron C., Uehara D. and Sirohi J., “Transient Hub Loads and Blade Deformation of a Mach-Scale Coaxial Rotor in Hover”, AIAA Paper 2015-1412, 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Kissimmee, Florida, 5-9 January 2015.
  21. Tran J., Sirohi J., Gao H. and Wei M., “Reduced order modeling of loads and deformation of a flexible flapping wing”, AIAA Paper 2015-0177, 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Kissimmee, Florida, 5-9 January 2015.
  22. Mula, S. M., Cameron, C., Tinney, C. E., Sirohi, J. “Low-Dimensional Characteristics of Tip Vortices from a Coaxial Rotor in Hover”, AHS International 70th Annual Forum, Montreal, Canada, May 20-22, 2014.
  23. Cameron C., Karpatne A. and Sirohi J., “Performance and Vibratory Hub Loads of a Mach-Scale Coaxial Rotor in Hover”, AHS International 70th Annual Forum, Montreal, Canada, May 20-22, 2014.
  24. Sicard J., and Sirohi J., “Aeroelastic stability of an extremely flexible, variable-diameter rotor in hover”, Fifth Decennial AHS International Aeromechanics Specialists’ Conference, San Francisco, CA, January 22-24, 2014.
  25. Choi Y-J., Sirohi J., and Raja L. L., “Experimental Characterization of a Magnetohydrodynamic Plasma Actuator for Stall Alleviation”, 39th European Rotorcraft Forum, Moscow, 3-6 September, 2013.
  26. Pafford B., Choi, Y-J., Sirohi J., and Raja L. L., “Experimental Characterization of the RailPAc Plasma Flow Actuator”, AIAA-2013-2886, 44th AIAA Plasma Dynamics and Lasers Conference, June 24-27, 2013, San Diego, CA.
  27. Pafford B., Sirohi J., and Raja L. L., “Magnetohydrodynamic Plasma Actuators for Stall Alleviation”, AHS International 69th Annual Forum & Technology Display, May 21-23, 2013, Phoenix, AZ.
  28. Sicard, J., and Sirohi, J., “Investigation of the Divergence Stability Boundary of an Extremely Flexible Helicopter Rotor in Hover”, AIAA-2013-1712, 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 8-11 April 2013.
  29. Sirohi J., “Microflyers: Inspiration from Nature”, Bioinspiration, Biomimetics, and Bioreplication III, SPIE Smart Structures/NDE Symposium, 10-17th Mar. 2013.
  30. Sicard, J., and Sirohi, J., “Modeling of the Large Deformations of an Extremely Flexible Rotor Blade”, 38th European Rotorcraft Forum, Amsterdam, The Netherlands, September 4-7, 2012.
  31. Mula, S. M., Stephenson, J., Tinney, C. E., and Sirohi, J., “Dynamical and Evolutionary Characteristics of the Tip Vortex from a Four-Bladed Rotor in Hover”, American Helicopter Society 68th Annual Forum, Fort Worth, TX, May 1-3, 2012.
  32. Karpatne, A., Sirohi, J., Mula, S. M., and Tinney, C. E., “Investigation of Tip Vortex Aperiodicity in Hover”, American Helicopter Society 68th Annual Forum, Fort Worth, TX, May 1-3, 2012.
  33. Sicard, J., and Sirohi, J., “Prediction and Measurement of the Deformations of an Extremely Flexible Rotor using Digital Image Correlation”, American Helicopter Society 68th Annual Forum, Fort Worth, TX, May 1-3, 2012.
  34. Stephenson, J., Mula, S. M., Tinney, C. and Sirohi, J., “Far Wake Rotorcraft Vortex Tumbling” AIAA-2012-425, 50th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Nashville, Tennessee, Jan. 9-12, 2012.
  35. Lawson, M. S. and Sirohi, J., “Measurement of Deformation of Rotating Blades Using Digital Image Correlation, AIAA-2011-1876, 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Denver, Colorado, April 2011.
  36. Mula, S. M., Stephenson, J., Tinney, C. E., and Sirohi, J., “Vortex Jitter in Hover”, AHS Southwest Region Technical Specialists’ Meeting, 23-25 February, 2011, Fort Worth, TX.
  37. Sicard, J., and Sirohi, J., “Twist Control of an Extremely Flexible Rotor Blade for Micro-Aerial Vehicles”, AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Tempe, AZ, Jan 25-27, 2011.
  38. Mahadik, R., Karpatne, A., and Sirohi, J., “Design and Testing of a Morphing Micro Aerial Vehicle”, AHS International Specialists’ Meeting on Unmanned Rotorcraft and Network Centric Operations, Tempe, AZ, Jan 25-27, 2011.
  39. Albright, J., and Sirohi, J., “Conceptual Design of a Hover-Capable High-Speed Multi-Role MAV”, AHS 66th Annual Forum, Phoenix, AZ, 11-13 May 2010.
  40. Sicard, J., and Sirohi, J., “Behavior of an Extremely Flexible Rotor in Hover and Forward Flight”, AHS 66th Annual Forum, Phoenix, AZ, 11-13 May 2010.
  41. Stephenson, J. H., Tinney, C. E., and Sirohi, J., “The Near Field Pressure of a Small-Scale Rotor During Hover”, AIAA-2010-8, 48th AIAA Aerospace Sciences Meeting and Exhibit, Orlando, FL, 4-7 January 2010.
  42. Sirohi, J. and Chopra, I., “Overview of Piezoceramic Actuators and Sensors”, Proceedings of the 20th International Conference on Adaptive Structures Technology, Hong Kong, p. 70-81, October 2009.
  43. Mahadik, R., and Sirohi, J., “Harvesting Wind Energy Using A Galloping Piezoelectric Beam”, ASME 2009 Conference on Smart Materials, Adaptive Structures & Intelligent Systems, Oxnard, CA, Sept. 21-23, 2009.
  44. Sirohi, J., and Datta, A., “Investigation of an Extremely Flexible Stowable Rotor”, AHS 65th Annual Forum, Grapevine, TX, 27-29 May 2009.
  45. Sirohi, J., Allen. K., and Chopra, I., “Development of Mach-Scale Swashplateless Rotor with Embedded Trailing-Edge Flaps”, 33rd European Rotorcraft Forum, Kazan, Russia, September 10-13, 2007.
  46. Bubert, E.A., Woods, B.K.S., Sirohi, J., Kothera, C.S., and Wereley, N.M., “Spin Testing of Pneumatic Artificial Muscle Systems for Helicopter Rotor Applications”, Paper No. DETC2007-35653, ASME International Design Engineering Technical Conference, Las Vegas, NV, September 4-7, 2007.
  47. John, S., Sirohi, J., and Wereley, N., “Development of a Piezohydraulic Active Pitch Link for a Swashplateless Helicopter Rotor”, Paper No. AIAA2007-1720, 48th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, Apr. 23-26, 2007.
  48. Woods, B.K.S., Bubert, E.A., Kothera, C.S., Sirohi, J., and Wereley, N.M., “Experimental Testing of Pneumatic Artificial Muscles for Trailing Edge Flap Actuation”, Paper No. AIAA2007-1718, 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, Apr. 23-26, 2007.
  49. Benedict, M., Sirohi, J., and Chopra, I., “Design and Testing of a Cycloidal-Rotor MAV”, AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Chandler, AZ, January 23-25, 2007.
  50. Hrishikeshavan, V., Sirohi, J., Tishchenko, M., and Chopra, I., “Design and Stability of a Shrouded Rotor Micro Air Vehicle With Anti-Torque Vanes”, AHS International Specialists’ Meeting on Unmanned Rotorcraft: Design, Control and Testing, Chandler, AZ, January 23-25, 2007.
  51. Kothera, C.S., Jangid, M., Sirohi, J., and Wereley, N.M., “Experimental Characterization and Static Modeling of McKibben Actuators”, Paper No. IMECE2006-15390, ASME International Mechanical Engineering Congress and Exposition, Chicago, IL, November 5-10, 2006, pp. 357—367.
  52. John, S., Sirohi, J., Wang, G., and Wereley, N., “Comparison of Piezoelectric, Magnetostrictive and Electrostrictive Hybrid Hydraulic Actuators”, Paper No. IMECE2006-15698, Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Chicago, IL, November 5-10, 2006, pp. 409—418.
  53. Sirohi, J., Parsons, E., and Chopra, I., “Cycloidal Rotor Micro Air Vehicle”, presented at AHS 62nd Annual Forum, Phoenix, AZ, May 9 – 12, 2006.
  54. Couch, R., Sirohi, J., and Chopra, I., “Testing and Modeling of NiMnGa Ferromagnetic Shape Memory Alloy for Static and Dynamic Loading Conditions”, presented at SPIE Smart Structures & Materials Conference, San Diego, CA, February 26 – March 2, 2006.
  55. John, S., Yoo, J-H., Sirohi, J., and Wereley, N., “Bi-Directional Actuation of a Piston using MR Valves and a Piezoelectric Pump”, Paper No. IMECE2005-82771, Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Orlando, FL, November 2005, pp. 411—420.
  56. Sirohi, J., Tishchenko, M., and Chopra, I., “Design and Testing of a Micro-Aerial Vehicle with a Single Rotor and Turning Vanes”, AHS 61st Annual Forum, Grapevine, TX, 1-3 June 2005.
  57. Brindejonc, A., Sirohi, J., and Chopra, I., “Design and Flight Testing of an Autorotative Payload Delivery System: The Autobody”, AHS 61st Annual Forum, Grapevine, TX, 1-3 June 2005.
  58. Samuel, P., Sirohi, J., Bohorquez, F., and Couch, R., “Design and Testing of a Rotary Wing MAV with an Active Structure for Stability and Control”, AHS 61st Annual Forum, Grapevine, TX, 1-3 June 2005.
  59. Ellison, J., Sirohi, J., and Chopra, I., “Investigation of Active Materials as Driving Elements of a Hydraulic Hybrid Actuator”, Proc. SPIE Vol. 5764, p. 274-289, Smart Structures and Materials 2005: Smart Structures and Integrated Systems; Alison B. Flatau; Ed., May 2005.
  60. Parsons, E., Sirohi, J., and Chopra, I., “Investigation of a Cycloidal Rotor Concept for Micro Hovering Aerial Vehicles”, AHS International Specialists’ Meeting Unmanned Rotorcraft: Design, Control and Testing, Chandler, AZ, January 18-20, 2005.
  61. Samuel, P., Sirohi, J., Couch, R., and Bohorquez, F., “Development of a Rotary Wing MAV with an Active Flexible Structure for Stability and Control”, AHS International Specialists’ Meeting Unmanned Rotorcraft: Design, Control and Testing, Chandler, AZ, January 18-20, 2005.
  62. Couch, R., Sirohi, J. and Chopra, I., “A Comprehensive Quasi-Static Model of NiMnGa Magnetic Shape Memory Alloy”, 15th International Conference on Adaptive Structures Technology, Bar Harbor ME, October 2004.
  63. Yoo, J-H., Sirohi, J., John, S., Chaudhuri, A., Cadou, C., Wereley, N., “Bidirectional Control of a Magnetorheological Piezo-Hydraulic actuator”, SPIE Vol. 5390, p. 116-126, Smart Structures and Materials 2004: Smart Structures and Integrated Systems; Alison B. Flatau; Ed., July 2004.
  64. Ellison, J., Sirohi, J., Chopra, I., “Design and Testing of a Bidirectional Magnetostrictive-Hydraulic Hybrid Actuator”, Proc. SPIE Vol. 5390, p. 483-494, Smart Structures and Materials 2004: Smart Structures and Integrated Systems; Alison B. Flatau; Ed., July 2004.
  65. Sirohi, J. and Nagaraj, V. T., and Chopra, I., “Design and Testing of a Rotor for Autonomous Autorotation”, 60th AHS forum, Baltimore, MD, 7-10 June 2004.
  66. Sirohi, J., and Chopra, I., “Measurement of the Dynamic Response of a Piezohydraulic Actuator”, 14th International Conference on Adaptive Structures Technology, Seoul, Korea, 7-9th October 2003.
  67. Yoo, J-H., Sirohi, J., and Wereley, N., “A Hybrid MR and Piezo Hydraulic Actuator”, 14th International Conference on Adaptive Structures Technology, Seoul, Korea, 7-9th October 2003.
  68. Yoo, J-H., Sirohi, J., Wereley, N. and Chopra, I., “A Magnetorheological Hydraulic Actuator Driven by a Piezopump”, Proc. SPIE Vol. 5056, p. 444-456, Smart Structures and Materials 2003: Smart Structures and Integrated Systems; Amr M. Baz; Ed., August 2003.
  69. Yoo, J-H., Sirohi, J., Wereley, N. and Chopra, I., “Magnetorheological Hydraulic Actuator Driven by a Piezopump”, Paper No. IMECE2003-43315, Proceedings of the ASME International Mechanical Engineering Congress and Exposition, Washington, DC, USA, November 15–21, 2003, 389—397.
  70. Sirohi, J., Cadou, C., and Chopra, I., “Frequency Domain Modeling of a Piezohydraulic Actuator”, AIAA Paper #2003-1641, Proceedings of the 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Norfolk VA, 7-10 April 2003.
  71. Sirohi, J., and Chopra, I., “Design and Testing of a High Pumping Frequency Piezoelectric- Hydraulic Hybrid Actuator”, Proceedings of the 13th International Conference on Adaptive Structures Technology, Potsdam, Germany, 7-9 October 2002.
  72. Sirohi, J., and Chopra, I., “Design and Testing of a High Pumping Frequency Piezoelectric-Hydraulic Hybrid Actuator”, Proc. SPIE Vol. 4701, p. 552-569, Smart Structures and Materials 2002: Smart Structures and Integrated Systems; L. Porter Davis; Ed., August 2002.
  73. Sirohi, J., and Chopra, I., “Compact Piezo-Hydraulic Hybrid Actuator”, Proceedings of the 12th International Conference on Adaptive Structures Technology, University of Maryland, University College, MD 20742, p. 70-81, October 2001.
  74. Sirohi, J., and Chopra, I., “Development of a Compact Piezoelectric-Hydraulic Hybrid Actuator”, Proc. SPIE Vol. 4327, p. 401-412, Smart Structures and Materials 2001: Smart Structures and Integrated Systems; L. Porter Davis; Ed. August 2001.
  75. Yoo, J-H., Sirohi, J., and Wereley, N., “Design of a MR Hydraulic Power Actuation System”, Proc. SPIE Vol. 4327, p. 148-158, Smart Structures and Materials 2001: Smart Structures and Integrated Systems; L. Porter Davis; Ed. August 2001.
  76. Sirohi, J., and Chopra, I., “Actuator Power Reduction Using L-C Oscillator Circuits”, AIAA Paper #2000-1791, Proceedings of the 41st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Atlanta GA, 3-6 April 2000.
  77. Samuel, P., Sirohi, J., Rudd, L., Pines, D., and Perel R., “Design and Analysis of a Micro Coaxial Rotorcraft”, Presented at the American Helicopter Society Vertical Lift Aircraft Design Conference, San Francisco CA, 19-21st January 2000.
  78. Sirohi, J., and Chopra, I., “Fundamental Understanding of Piezoelectric Strain Sensors”, Proc. SPIE Vol. 3668, p. 528-542, Smart Structures and Materials 1999: Smart Structures and Integrated Systems; Norman M. Wereley; Ed. June 1999.
  79. Sirohi, J., and Chopra, I., “Fundamental Behavior of Piezoceramic Sheet Actuators”, Proc. SPIE Vol. 3329, p. 626-646, Smart Structures

and Materials 1998: Smart Structures and Integrated Systems; Mark E. Regelbrugge; Ed. July 1998.