Title :
An adaptive actuator failure compensation controller using output feedback
Author :
Tao, Gang ; Chen, Shuhao ; Joshi, Suresh M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Virginia Univ., Charlottesville, VA, USA
Abstract :
An adaptive control scheme using output feedback for output tracking is developed for systems with unknown actuator failures that some unknown inputs are stuck at some unknown fixed values at unknown time instants. An effective controller structure is proposed which achieves desired plant-model output matching when implemented with matching parameters and asymptotic output tracking when implemented with adaptive parameter estimates. A completely parametrized linear error equation is obtained based on which a stable adaptive law is derived for parameter adaptation in the presence of parameter uncertainties. All dosed-loop signals are bounded and the plant output tracks a given reference output asymptotically, despite the uncertainties in actuator failures and plant parameters, as shown analytically and by simulation results from a case study of yaw rate control of Boeing 747 lateral dynamics
Keywords :
adaptive control; closed loop systems; feedback; stability; state feedback; Boeing 747 lateral dynamics; adaptive actuator failure compensation controller; adaptive control scheme; closed-loop signals; output feedback; output tracking; parameter adaptation; parameter uncertainties; parametrized linear error equation; plant-model output matching; yaw rate control; Actuators; Adaptive control; Equations; Failure analysis; Impedance matching; Output feedback; Parameter estimation; Programmable control; Uncertain systems; Uncertainty;
Conference_Titel :
American Control Conference, 2001. Proceedings of the 2001
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-6495-3
DOI :
10.1109/ACC.2001.946391
