Fault Diagnosis and Self-Restore Fault-Tolerant Control for Systems with State Delays
Facing to a class of faults whose dynamic characteristics are known, but initial states and initial instants are unknown, fault diagnosis and self-restore fault-tolerant control are researched for linear systems with state delays. A novel observer-based approach to fault diagnosis is proposed, and a design approach to fault-tolerant control law is given. By introducing a special linear transformation, the time-delay systems are transformed into the delay-free ones. Then, the problem of fault diagnosis for time-delay systems is transformed into a problem of state observation for delay-free systems. By constructing a novel fault diagnoser which doesnt need residual to embody faults, fault diagnosis is realized on-line. Finally, by using the results of fault diagnosis, a dynamic self-restore control law and a compensation law for output measurement values are designed, so that the states and the measured outputs of the system are isolated from faults. A simulation example is given to demonstrate the feasibility and validity of the proposed scheme.
State Delay Fault Diagnosis Delay-Free Transformation Observer Fault-Tolerant Control Self-Restore
Xin-Li Lv Juan Li
College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109, China
国际会议
2009年中国控制与决策会议(2009 Chinese Control and Decision Conference)
广西桂林
英文
902-907
2009-06-17（万方平台首次上网日期，不代表论文的发表时间）