Title :
An LQ control based actuator failure compensation scheme for possibly nonminimum phase systems
Author :
Liyan Wen ; Gang Tao ; Hao Yang
Author_Institution :
Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
In this paper, an LQ control based actuator failure compensation control scheme is developed for possibly nonminimum phase systems with actuator failures. The failure compensation control problem is formulated as a new LQ control problem for systems with failure disturbances. A new disturbance rejection problem for systems with unmatched disturbances is solved through an LQ based control algorithm to ensure the maximum reduction of the disturbance effect on the system output. New controller structures and design conditions are derived using dynamic programming in the presence of actuator failures, and state feedback and observer-based feedback designs are presented. Simulation results are presented to verify the desired control system performance in the presence of actuator failures.
Keywords :
compensation; control system synthesis; dynamic programming; linear quadratic control; state feedback; LQ based control algorithm; actuator failure compensation control scheme; disturbance rejection problem; dynamic programming; failure disturbances; maximum disturbance effect reduction; observer-based feedback designs; possibly nonminimum phase systems; state feedback; Actuators; Adaptation models; Control design; Cost function; Feedback control; Mathematical model; Observers;
Conference_Titel :
American Control Conference (ACC), 2015
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4799-8685-9
DOI :
10.1109/ACC.2015.7171184