Integrated Active Fault-Tolerant H-infinity Control by Designing an Auxiliary Self-Examination Plant

This paper proposes an integrated design of active fault-tolerant H_∞ control in the presence of unknown actuator faults. An adaptive tracking law is designed by designing an auxiliary self-examination plant, so that actuator fault parameters and their boundaries are estimated accurately and the identification of each actuator fault is decoupled from exogenous disturbance and other actuator faults in a fault observer. With the information of fault diagnosis, especially the boundaries of estimation errors, an integrated fault-tolerant H_∞ control method is constructed to guarantee the overall H_∞ performance of the system in the presence of unknown actuator faults. Finally, the effectiveness of the proposed approach is validated by stabilizing an F-16 fighter.