Abstract
The fault-tolerant control problem is studied for a class of discrete-time systems subjected to sensor fault. The data-based fault detection method is constructed to detect sensor fault, which avoids obtaining residual signal by designing fault detection observer. When the fault is detected, a discrete-time observer is built for estimating sensor fault. The fault estimation is employed to realize controller reconstruction. For the purpose of obtaining better control performance, a model-free adaptive fault-tolerant controller is developed by employing more past control information. Accordingly, the flexibility and adaptability of the fault-tolerant controller are improved by introducing more adjustable parameters. Finally, the developed method is validated to be effective by a simulation example.
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