- Title
- Fault estimation and controller compensation in Lure systems by LPV-embedding
- Creator
- Hanafi, Ainain Nur; Seron, Maria M.; De Dona, Jose A.
- Relation
- International Journal of Control Vol. 92, Issue 8, p. 1914-1927
- Publisher Link
- http://dx.doi.org/10.1080/00207179.2017.1418984
- Publisher
- Taylor & Francis
- Resource Type
- journal article
- Date
- 2019
- Description
- Previous works have considered the use of set invariance theory for fault detection and isolation in non- linear Lure systems. This paper extends those results and proposes a new actuator fault-tolerant control approach. The fault-tolerant control scheme is designed based on linear parameter-varying (LPV) models of Lure systems. The actuator fault situation is diagnosed by an invariant set-based fault detection and iso- lation algorithm. Faults are compensated by adapting the controller gain based on estimates of the fault magnitude. Conditions for correct fault detection and isolation, and closed-loop stability are derived. The proposed fault-tolerant control scheme is compared with a linearised model approach and the performance of both, LPV-embedding and linearised, approaches are analysed for scalar and second-order systems. An example of a chaotic Chua circuit is also provided to illustrate the proposed fault-tolerant control scheme in higher-order systems.
- Subject
- set invariance; nonlinear lure systems; LPV-embedding; fault diagnosis; fault estimation
- Identifier
- http://hdl.handle.net/1959.13/1469089
- Identifier
- uon:48148
- Identifier
- ISSN:0020-7179
- Language
- eng
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