Journal
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume 69, Issue 1, Pages 154-158Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSII.2021.3076890
Keywords
Circuit faults; Data models; Adaptation models; Estimation; Discrete-time systems; Observers; Fault tolerant systems; Data-driven; discrete-time systems; sensor fault; model-free adaptive control; partial form dynamic linearization; fault-tolerant control
Categories
Funding
- Liaoning Revitalization Talents Program [XLYC1802010]
- National Natural Science Foundation of China [61973070]
- SAPI Fundamental Research Funds [2018ZCX22]
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This study focuses on a class of discrete-time systems subjected to sensor fault. A data-based fault detection method and a discrete-time observer are constructed to detect and estimate sensor fault, respectively. Controller reconstruction is realized through fault estimation, resulting in a model-free adaptive fault-tolerant controller with improved flexibility, adaptability, and control performance.
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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