Adaptive fault-tolerant robust control for a linear system with adaptive fault identification

作者：Shen, Yi^*; Liu, Lijun; Dowell, Earl H.

来源：IET Control Theory and Applications, 2013, 7(2): 246-252.

DOI：10.1049/iet-cta.2012.0696

• ACTUATOR FAILURE COMPENSATION
• UNCERTAIN NONLINEAR-SYSTEMS
• H-INFINITY CONTROL
• TRACKING CONTROL
• STATE-FEEDBACK
• FLIGHT CONTROL
• DESIGN
• ACCOMMODATION

An integrated design of the adaptive robust control and the fault identification for a linear system with actuator faults is proposed. When actuators suffer from unpredicted faults, the proposed control strategy can track the actuator fault parameters adaptively without any prior fault information, and guarantee the robustness of the faulty system. An unknown input observer is designed to decouple the disturbance and the actuator faults. Then an adaptive control law with projection is presented to track the fault parameters. A new definition of robust H-infinity-like performance is proposed to ensure that the system is robust for both exogenous disturbance and unpredicted faults. Then the adaptive robust control law is designed to guarantee the system satisfying the robust H-infinity-like performance. Finally, the effectiveness of this control strategy is illustrated through the fault-tolerant longitudinal control of the simplified F-18 aircraft model.

• 出版日期2013-1
• 单位厦门大学; 哈尔滨工业大学