Detection and isolation of actuator and sensor faults for networked control systems

Ahmadi, Ali-Akbar and Salmasi, Farzad R. (2016) Detection and isolation of actuator and sensor faults for networked control systems. Optimal Control Applications and Methods. ISSN 0143-2087

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Abstract

Detection and isolation of actuator and sensor faults in presence of disturbance for a class of linear networked control systems is considered, while unknown network-induced delay is taken into account. The network-induced delay effect is modeled by time-varying polytopic uncertainties. Using eigen-structure assignment approach, a fault detection filter is designed to decouple the fault and plant disturbance, while minimizing the effect of the induced delays in the network, using H∞ and H− index theories and benefiting from the free parameters in the eigen-structure assignment approach. If the full disturbance de-coupling is not feasible, another filter is designed to achieve partial de-coupling and maximum robustness against the disturbance and network-induced delay, while sensitivity to the fault is optimized. The actuator fault and disturbance vectors are augmented to define a new disturbance vector for isolation of the sensor and actuator faults. Numerical simulations are performed to evaluate the feasibility and applicability of the proposed approach.

Item Type: Article
Subjects: Construction and engineering
Depositing User: Farzad Rajaei Salmasi
Date Deposited: 17 Jun 2016 09:13
Last Modified: 20 Dec 2016 16:30
URI: http://repository.uwl.ac.uk/id/eprint/2558

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