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| Received:April 23, 2008Revised:September 20, 2008 |
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| Adaptive fault-tolerant control of linear time-invariant systems in the presence of actuator saturation |
| Wei GUAN, Guanghong YANG |
| (Key Laboratory of Integrated Automation for the Process Industry, Ministry of Education, and College of Information Science and Engineering, Northeastern University, Shenyang Liaoning 110004, China; School of Automation, Shenyang Institute of Aeronautical Engineering, Shenyang Liaoning 110136, China) |
| Abstract: |
| This paper studies the problem of designing adaptive fault-tolerant controllers for linear time-invariant systems with actuator saturation. New methods for designing indirect adaptive fault-tolerant controllers via state feedback are presented for actuator fault compensations. Based on the on-line estimation of eventual faults, the adaptive fault-tolerant controller parameters are updating automatically to compensate the fault effects on systems. The designs are developed in the framework of linear matrix inequality (LMI) approach, which can enlarge the domain of attraction of closed-loop systems in the cases of actuator saturation and actuator failures. Two examples are given to illustrate the effectiveness of the design method. |
| Key words: Actuator saturation Linear systems Adaptive control Fault-tolerant control Domain of attraction LMIs |
