MAIN RESEARCH AREAS:
Fault-Tolerant Flight Control
During the previous decade members of the FCSL have investigated several control architectures for the design of fault-tolerant flight control systems. Specifically, FCSL was involved in the design and validation of the control laws for both ‘Gen-1’ and ‘Gen-2’ of the NASA IFCS program. The specific tasks performed by FCSL researchers included the development of a detailed Simulink-based IFCS simulation environment, the Simulink coding of the ‘Gen-1’ control laws (known as the SOFFT control laws), the development and the evaluation of parameter identification algorithms within the ‘Gen-1’ phase of the program, the design and the development of the “Safety Monitor” scheme within the ‘Gen-2’ of the program, as well as the Simulink-coding of the Versatile Control Augmentation System (VCAS) that were later flight tested within ‘Gen-2’. In 2004, FCSL also started a parallel NASA funded effort with the goal of assessing the performance of the “Gen-2” flight control laws through flight-testing using the WVU YF-22 subscale research aircraft. Specifically, a subset of the ‘Gen-2’ control laws were successfully tested and validated in flight in the presence of actuator failures injected on the primary control surfaces of the WVU YF-22 aircraft.
The current research on fault-tolerant flight control, funded by NASA Langley, focuses on integrating three uncertainly handling tools: robustness, adaptation, and switching. Flight tests are currently underway to evaluate the performance of control laws under actuator and propulsion system failure conditions.
Tancredi, D., Gu, Y., Phillips, K., Gururajan, S., and Napolitano, M.R., “Development of Adaptive Control Laws for Actuator Fault Accommodation,” 2010 AIAA Guidance, Navigation, and Control, Toronto, Ontario, Canada, Aug. 2-5, 2010.
Sagoo, G.K., Gururajan, S., Napolitano, M.R., Perhinschi, M.G., Gu, Y., Seanor, B., and Campa, G., “Pilot-in-the-Loop Assessment of Neurally Augmented Dynamic Inversion Based Fault Tolerant Control Laws in a Motion-Based Flight Simulator,” 2008 AIAA Modeling and Simulation Technologies Conference, AIAA 2008-6843, Honolulu, Hawaii, August 2008.
Perhinschi, M.G., Napolitano, M.R., Campa, G., Seanor, B., Gururajan. S., and Gu, Y., “ Development of Fault-Tolerant Flight Control Laws for the WVU YF-22 Model Aircraft,” Proceedings of the AIAA Guidance, Navigation, and Control Conference, AIAA 2007-6511, Hilton Head, SC, August 2007.
Campa G., Fravolini M.L., Mammarella M., Napolitano M.R. “Bounding Set Calculation for Neural Network Based Output Feedback Adaptive Control Systems”, Neural Computing and Applications. On-line: DOI: 10.1007/s00521-010-0404-6. April 2010
Perhinschi M. G., Napolitano M.R., Campa G., “A Simulation Environment for Design and Testing of Aircraft Adaptive Fault-Tolerant Control Systems”, Aircraft Engineering and Aerospace Technology: An International Journal, Vol. 80,Issue 6, pp. 620-632, Dec. 2008
Campa G., Fravolini M.L., Napolitano M.R. “A Stochastically Optimal Feedforward and Feedback Technique for Flight Control Systems of High Performance Aircraft.” Automatic control in Aerospace Year 2 - N°1 - June 2009, ISSN 1974-5168.
Perhinschi, M. G., Napolitano, M. R., Campa, G., Seanor, B., Burken J., Larson R., "An Adaptive Threshold Approach for the Design of an Actuator Failure Detection and Identification Scheme", IEEE Transactions on Control Systems Technology, Vol.14, No 3, pp 519-525, May 2006.
Perhinschi M. G., Napolitano M.R., Campa G., Seanor B., Burken J., Larson R., "Design Of Safety Monitor Schemes For A Fault Tolerant Flight Control System", IEEE Transactions on Aerospace and Electronic Systems, Vol. 42, Issue 2, pp 562-571, Apr 2006.
Perhinschi, M. G., Campa, G., Napolitano, M. R., Lando, M., Massotti, L., Fravolini, M. L., "Modeling and Simulation of Closed Loop Aircraft/Fault Tolerant Control System", International Journal of Modeling and Simulation, Vol. 26, No 1, 2006.