CONDUIT® Technical Papers

  1. Tischler, M. B., Berger, T., Ivler, C. M., Mansur, M. H., Cheung, K. K., Soong, J. Y., "Practical Methods for Aircraft and Rotorcraft Flight Control Design: An Optimization-Based Approach," AIAA, 2017.
  2. Tischler, M. B., Colbourne, J. D., Morel, M. R., Biezad, D. J., Levine, W. S., Moldoveanu, V., "CONDUIT-A New Multidisciplinary Integration Environment for Flight Control Development," [pdf] Proceedings of the AIAA Guidance, Navigation, and Control Conference, New Orleans, LA, August 11–13, 1997.
  3. Colbourne, J. D., “The Development of the CONDUIT Advanced Control System Design and Evaluation Interface with a Case Study Application to an Advanced Fly by Wire Helicopter Design,” [pdf] Published as a NASA Technical Memorandum, March 1999.
  4. Colbourne, J. D., Frost, C. R., Tischler, M. B., Cheung, K. K., Hiranaka, D. K., Biezad, D. J., “Control Law Design and Optimization for Rotorcraft Handling Qualities Criteria Using CONDUIT,” [pdf] Proceedings of the American Helicopter Society 55th Annual Forum, Montréal, Canada, May 25–27, 1999.
  5. Frost, C. R., Tischler, M. B., Bielefield, M., LaMontagne, T., "Design and Test of Flight Control Laws for the Kaman BURRO Unmanned Aerial Vehicle," [pdf] AIAA Atmospheric Flight Mechanics Conference, Denver, CO, August 14–17, 2000.
  6. Tischler, M. B., Lee, J. A., Colbourne, J. D., “Optimization and Comparison of Alternative Flight Control System Design Methods Using a Common Set of Handling-Qualities Criteria,” [pdf] Proceedings of the AIAA Guidance, Navigation, and Control Conference, Montréal, Canada, August 6–9, 2001.
  7. Johnson, C. K., Mittleider, D., Tischler, M. B., Cheung, K. K., “Analysis, Design, & Optimization of the Helicopter Active Control Technology (HACT) Flight Control System,” [pdf] Proceedings of the American Helicopter Society 58th Annual Forum, Montréal, Canada, June 11–13, 2002.
  8. Tischler, M. B., Blanken, C. L., Cheung, K. K., Swei, S. S. M., Sahasrabudhe, V., Faynberg, A., “Optimization and Flight Test Results of Modern Control Laws for the UH-60 Black Hawk,” [pdf] Proceedings of the American Helicopter Society 4th Decennial Specialists' Conference on Aeromechanics, San Francisco, CA, January 21–23, 2004.
  9. Tischler, M. B., Blanken, C. L., Cheung, K. K., Swei, S. S. M., Sahasrabudhe, V., Faynberg, A., “Modernized Control Laws for UH-60 Black Hawk Optimization and Flight-Test Results,” [pdf] AIAA Journal of Guidance, Control and Dynamics, Vol. 28, No. 5, September–October 2005.
  10. Harding, J. W., Moody, S. J., Mansur, M. H., Tischler, M. B., “Development of Modern Control Laws for the AH-64D in Hover/Low Speed Flight,” [pdf] Proceedings of the American Helicopter Society 62nd Annual Forum, Phoenix, AZ, May 9–11, 2006.
  11. Downs, J., Prentice, R., Dalzell, S., Besachio, A., Ivler, C. M., Tischler, M. B., Mansur, M. H., “Control System Development and Flight Test Experience with the MQ-8B Fire Scout Vertical Take-Off Unmanned Aerial Vehicle (VTUAV),” [pdf] Proceedings of the American Helicopter Society 63rd Annual Forum, Virginia Beach, VA, May 1–3, 2007.
  12. Christensen, K. T., Campbell, K. G., Griffith, C. D., Ivler, C. M., Tischler, M. B., Harding, J. W., “Flight Control Development for the ARH-70 Armed Reconnaissance Helicopter Program,” [pdf] Proceedings of the American Helicopter Society 63rd Annual Forum, Virginia Beach, VA, May 1-3, 2007.
  13. Harding, J. W., Mansur, M. H., Tischler, M. B., Moody, S. J., McCann, R. C., “Optimization and Piloted Simulation Results of the AH-64D Modern Control Laws,” [pdf] Proceedings of the American Helicopter Society 63rd Annual Forum, Virginia Beach, VA, May 1–3, 2007.
  14. Fletcher, J. W., Lusardi, J. A., Moralez III, E., Robinson, D. E., Arterburn, D. R., Cherepinsky, I., Driscoll, J., Morse, C. S., Kalinowski, K. F., “UH-60M Upgrade Fly-By-Wire Flight Control Risk Reduction using the RASCAL JUH-60A In-Flight Simulator, [pdf]” Proceedings of the American Helicopter Society 64th Annual Forum, Montréal, Canada, April 29–May 1, 2008.
  15. Tischler, M. B., Ivler, C. M., Mansur, M. H., Cheung, K. K., Berger, T., Berrios, M. G., “Handling-Qualities Optimization and Trade-offs in Rotorcraft Flight Control Design,” [pdf] Proceedings of the RAeS Rotorcraft Handling-Qualities Conference, University of Liverpool, United Kingdom, November 4–6, 2008.
  16. Mansur, M. H., Lusardi, J. A., Tischler, M. B., Berger, T., “Achieving the Best Compromise between Stability Margins and Disturbance Rejection Performance,” [pdf] Proceedings of the American Helicopter Society 65th Annual Forum, Grapevine, TX, May 27–29, 2009.
  17. Berger, T., Tischler, M. B., Blanken, C. L., Fujizawa, B. T., Harding, J. W., Borden, C. C., Cothren, L. E., Wright, J. J., Arterburn, D. R., Pfrommer, M. R., “Improved Handling Qualities for the OH-58D Kiowa Warrior in the Degraded Visual Environment,” [pdf] Proceedings of the American Helicopter Society 67th Annual Forum, Virginia Beach, VA, May 3–5, 2011.
  18. Link, D. W., Kashawlic, B. E., Fujizawa, B. T., Tischler, M. B., “Influence of Frequency Response Analysis on MH-47G DAFCS Development and Flight Test,” [pdf] Proceedings of the American Helicopter Society 67th Annual Forum, Virginia Beach, VA, May 3–5, 2011.
  19. Mansur, M. H., Tischler, M. B., Bielefield, M. D., Bacon, J. W., Cheung, K. K., Berrios, M. G., Rothman, K. E., “Full Flight Envelope Inner-Loop Control Law Development for the Unmanned K- MAX®,” [pdf] Proceedings of the American Helicopter Society 67th Annual Forum, Virginia Beach, VA, May 3–5, 2011.
  20. Ivler, C. M., Tischler, M. B., Powell, J. D., “Cable Angle Feedback Control Systems to Improve Handling Qualities for Helicopters with Slung Loads,” [pdf]Proceedings of the AIAA Guidance, Navigation, and Control Conference, Portland, OR, August 8–11, 2011.
  21. Fujizawa, B. T., Tischler, M. B., Arlton, P. E., Arlton, D. J., “Control System Development and Flight Testing of the Tiger Moth UAV,” [pdf] Proceedings of the American Helicopter Society 68th Annual Forum, Fort Worth, TX, May 1–3, 2012.
  22. Ivler, C. M., Powell, J. D., Tischler, M. B., Fletcher, J. W., Ott, C., “Design and Flight Test of a Cable Angle/Rate Feedback Flight Control System for the RASCAL JUH-60 Helicopter,” [pdf] Proceedings of the American Helicopter Society 68th Annual Forum, Fort-Worth, TX, May 1–3, 2012.
  23. Juhasz, O., Celi, R., Ivler, C. M., Tischler, M. B., Berger, T., “Flight Dynamic Simulation Modeling of Large Flexible Tiltrotor Aircraft,” Proceedings of the American Helicopter Society 68th Annual Forum, Fort Worth, TX, May 1–3, 2012. [pdf]
  24. Berger, T., Tischler, M. B., Hagerott, S. G., Gangsaas, D., Saeed, N., “Longitudinal Control Law Design and Handling Qualities Optimization for a Business Jet Flight Control System,” [pdf] Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Minneapolis, MN, August 13–16, 2012.
  25. Mansur, M. H., Tischler, M. B., “Flight Test Comparison of Alternate Strategies for Multi-Loop Control Law Optimization,” [pdf] Proceedings of the American Helicopter Society 69th Annual Forum, Phoenix, AZ, May 21–23, 2013.
  26. Berger, T., Tischler, M. B., Hagerott, S. G., Gangsaas, D., Saeed, N., “Lateral/Directional Control Law Design and Handling Qualities Optimization for a Business Jet Flight Control System,” [pdf] Proceedings of the AIAA Atmospheric Flight Mechanics Conference, Boston, MA, August 19–22, 2013.
  27. Berrios, M. G., Tischler, M. B., Cicolani, L. S., Powell, J. D., “Stability, Control, and Simulation of a Dual Lift System Using Autonomous R-MAX Helicopters,” [pdf] Proceedings of the American Helicopter Society 70th Annual Forum, Montreal, Canada, May 20–22, 2014.
  28. Fujizawa, B. T., Tischler, M. B., Ott, C. R., Blanken, C. L., “UH-60 Partial Authority Modernized Control Laws for Improved Handling Qualities in the Degraded Visual Environment,” [pdf] Proceedings of the American Helicopter Society 70th Annual Forum, Montreal, Canada, May 20–22, 2014.
  29. Theodore, C. R., Malpica, C. A., Blanken, C. L., Tischler, M. B., Lawrence, B., Lindsey, J. E., Berger, T., “Effect of Control System Augmentation on Handling Qualities and Task Performance in Good and Degraded Visual Environments,” [pdf] Proceedings of the American Helicopter Society 70th Annual Forum, Montreal, Canada, May 20–22, 2014.
  30. Berger, T., Tischler, M. B., Hagerott, S. G., “Piloted Simulation Handling Qualities Assessment of a Business Jet Fly-By-Wire Flight Control System,” [pdf] Proceedings of the AIAA SciTech Conference, Kissimmee, FL, January 5–9, 2015.
  31. Wei, W., Tischler, M. B., “System Identification and Controller Optimization of a Quadrotor UAV,” [pdf] Proceedings of the American Helicopter Society 71st Annual Forum, Virginia Beach, VA, May 5–7, 2015.
  32. Fujizawa, B., T., Tischler, M. B., Minor, J. S., “Outer-Loop Development and DVE Flight Test Assessment of a Partial Authority Model-Follow Control System for the UH-60,” [pdf] Proceedings of the American Helicopter Society 72nd Annual Forum, West Palm Beach, FL, May 17–19, 2016.
  33. Berger, T., Tischler, M. B., Hagerott, S. G., et al., “Handling Qualities Flight Test Assessment of a Business Jet NzU P-β Fly-By-Wire Control System,” [pdf] Proceedings of the  AIAA Atmospheric Flight Mechanics Conference, AIAA Science and Technology Forum and Exposition, Grapevine, Texas, January 9–13, 2017.
  34. Berrios, M. G., Berger, T., Tischler, M. B., Juhasz, O., Sanders, F. C., “Hover Flight Control Design for UAS using Performance-based Disturbance Rejection Requirements,” [pdf] Proceedings of the American Helicopter Society 73rd Annual Forum, Fort Worth, TX, May 9–11, 2017.
  35. Cheung, K. K., Wagster, J. A., IV., Tischler, M. B., Ivler, C. M., Berrios, M. G., Berger, T., Juhasz, O., Tobias, E. L., Goerzen, C. L., Barone, P. S., Sanders, F. C., Lopez, M. J. S., Lehmann, R. M., “An Overview of the U.S. Army Aviation Development Directorate Quadrotor Guidance, Navigation, and Control Project,” [pdf] Proceedings of the American Helicopter Society 73rd Annual Forum, Fort Worth, TX, May 9–11, 2017.
  36. Knapp, M. E., Ivler, C. M., Berrios, M. G., Berger, T., Tischler, M. B., “Kalman Filter Estimation of Rotor-State Flapping: An Optimization-based Approach with UH-60 Flight Test Data,” [pdf] Proceedings of the American Helicopter Society 73rd Annual Forum, Fort Worth, TX, May 9–11, 2017.
  37. Cho, S. H., Bhandari, S., Sanders, F. C., Cheung, K. K., Tischler, M. B., “System Identification and Controller Optimization of a Coaxial Quadrotor UAV in Hover,” [pdf] Proceedings of the AIAA Scitech Forum, San Diego, CA, January 7–11, 2019.
  38. Lopez, M. J. S., Tischler, M. B., Takahashi, M. D., Cheung, K. K., and Prasad, J.V.R., “Development and Evaluation of a Full Flight Envelope Integrated Flight and Vibration Controller,” Journal of the American Helicopter Society, Volume 64, Number 1, pp. 1-11(11), January 2019.
  39. Berger, T., Blanken, C. L., Tischler, M. B., and Horn, J. F., [pdf]“Flight Control Design and Simulation Handling Qualities Assessment of High-Speed Rotorcraft,” [pdf] Proceedings of the Vertical Flight Society’s 75th Annual Forum Proceedings, Philadelphia, PA, May 13–16, 2019.
  40. Lopez, M. J. S., Tischler, M. B., Juhasz, O., Gong, A., Sanders, F. C., Soong, J. Y., and Nadell, S. J., “Flight Test Comparison of Gust Rejection Capability for Various Multirotor Configurations,” [pdf] Proceedings of the Vertical Flight Society’s 75th Annual Forum & Technology Display, Philadelphia, PA, May 13–16, 2019.
  41. Knapp, M.E., Ivler, C. M., Horn, J. F., Johnson, E. N., Bridges, D. O., Lopez, M. J. S., Tischler, M. B., Wagster, J. A., and Cheung, K. K., “Development and Simulation of Damage Tolerant Control Laws for a Compound Helicopter,” [pdf] Proceedings of the AIAA SciTech Guidance Navigation and Control Conference, Orlando, January 6–10, 2020.
  42. Niemeic, R., Gandhi, F., Lopez, M. J. S., and Tischler, M. B., “System Identification and Handling Qualities Predictions of an eVTOL Urban Air Mobility Aircraft Using Modern Flight Control Methods,” [pdf] Proceedings of the Vertical Flight Society’s 76th Annual Forum & Technology Display, Virtual, October 6–8, 2020.
  43. Raz, R., Rosen, A., Nadell, S. J., Cicolani, L., Horn, J. F., Enciu, J., Chen, Z., Tischler, M. B., and Cheung, K. K., “Hardware-in-the-loop dynamic wind tunnel investigation of slung loads dynamics with application to active cargo hook stabilization of an M119 howitzer,” [pdf] Proceedings of the Vertical Flight Society’s 76th Annual Forum & Technology Display, Virtual, October 6–8, 2020.
  44. Berger, T., Tischler, M. B., and Horn, J. F., “Outer-Loop Flight Control Design and Simulation Handling Qualities Assessment for Coaxial-Compound and Tiltrotor Aircraft,” [pdf] Proceedings of the Vertical Flight Society’s 76th Annual Forum Proceedings, October 2020.
  45. Berger, T., Tischler, M. B., and Horn, J. F., “High-Speed Rotorcraft Pitch Axis Response Type Investigation,” [pdf]Proceedings of the Vertical Flight Society’s 77th Annual Forum Proceedings, May 2021.
  46. McKay, M., Vayalali, P., Gandhi, F., Berger, T., and Lopez, M. J. S., “Redistributed Allocation for Flight Control Failure on a Coaxial Helicopter,” [pdf] Proceedings of the Vertical Flight Society’s 77th Annual Forum & Technology Display, Virtual, May 11–13, 2021.
  47. Gong, A., Tischler, M. B., and Hess, R. A., “Deterministic Reconfiguration of Flight Control Systems for Multirotor UAV Package Delivery,” [pdf] Proceedings of the Vertical Flight Society’s 77th Annual Forum, May 2021.
  48. Berger, T., Tischler, M. B., Hagerott, S. G., Cotting, M. C., and Gray, W. R., “Business Jet Fly-By- Wire Control Laws Handling Qualities Flight Test Assessment,” Journal of Guidance, Control, and Dynamics, Vol. 44, No. 8, August 2021. 
  49. Walker, J., and Tischler, M. B., “Identification and Control Design of a Sub-Scale Flybarless Helicopter,” [pdf] Proceedings of the Vertical Flight Society 77th Annual Forum & Technology Display, Virtual, May 11–13, 2021.
  50. Tischler, M. B., “Flight Control Technology Advancements and Challenges for Future Rotorcraft 40th Alexander A. Nikolsky Honorary Lecture,” [pdf] Journal of the American Helicopter Society, Vol. 67, 2022.
  51. Ivler, C. M., Russell, K., Gong, A., Berger, T., and Lopez, M. J. S., “Toward a UAS Handling Qualities Specification: Development of UAS-Specific MTEs,” [pdf] Proceedings of the Vertical Flight Society’s 78th Annual Forum. 
  52. Walter, A., McKay, M., Niemiec, R., Gandhi, F., and Berger, T., “Hover Dynamics & Flight Control of a UAM-Scale Quadcopter with Hybrid RPM & Collective Pitch Control,” [pdf] Proceedings of the Vertical Flight Society’s 78th Annual Forum Proceedings, Ft. Worth, TX, May 10–12, 2022.
  53. Walker, J., and Tischler, M. B., “Simulation Model Update and Optimized Control Design of a Sub-Scale Flybarless Helicopter,” [pdf] Proceedings of the Vertical Flight Society 78th Annual Forum & Technology Display, Ft. Worth, TX, May 10–12, 2022.
  54. Gong,  A., Tischler, M. B., and Shalev-Eggert, O., “Flight Dynamics, Control, and Testing of a Coaxial Helicopter UAV with Folding Rotor Blades,” [pdf] Proceedings of the Vertical Flight Society 79th Annual Forum & Technology Display, West Palm Beach, FL, May 16–18, 2023.
  55. Nadell,  S. J., Berger, T., DiJoseph, A., and Huang, E., “Development, Simulation, and Flight Testing of Damage Tolerant Control Laws for the ADAPT™ Winged Compound Helicopter Scaled Demonstrator,” [pdf] Proceedings of the Vertical Flight Society 79th Annual Forum & Technology Display, West Palm Beach, FL, May 16–18, 2023.
  56. Walter,  A., Niemiec, R., Farhan, G., and Berger, T., “Forward Flight & MTE Simulation of a UAM-Scale Quadcopter with Hybrid RPM & Pitch Control,” [pdf] Proceedings of the Vertical Flight Society 79th Annual Forum & Technology Display, West Palm Beach, FL, May 16–18, 2023.