Publication

Actuator multiplicative fault estimation in discrete-time LPV systems using switched observers

Journal Article (2016)

Journal

Journal of Franklin Institute

Pages

3176–3191

Volume

353

Number

13

Doc link

http://dx.doi.org/10.1016/j.jfranklin.2016.06.007

File

Download the digital copy of the doc pdf document

Authors

  • Rotondo, Damiano

  • Lopez Estrada, Francisco Ronay

  • Nejjari Akhi-Elarab, Fatiha

  • Ponsart, Jean Christophe

  • Theilliol, Didier

  • Puig Cayuela, Vicenç

Abstract

This paper proposes an observer for the joint state and fault estimation devoted to discrete-time linear parameter varying (LPV) systems subject to actuator faults. The major contribution of this work is that the observer is able to estimate multiplicative faults, contrarily to the existing approaches, that consider additive faults. The main characteristic of this observer is that it is scheduled not only by means of the endogenous varying parameters of the faulty model, but also by the input vector. Another contribution of this paper consists in adding a switching component in order to guarantee the feasibility of the conditions for designing the observer gains. It is proved that, as long as the input sequence satisfies some characteristics, the convergence of the observer error dynamics to zero is assured. A numerical example is used to demonstrate the effectiveness of the proposed strategy.

Categories

control theory.

Scientific reference

D. Rotondo, F.R. Lopez, F. Nejjari, J.C. Ponsart, D. Theilliol and V. Puig. Actuator multiplicative fault estimation in discrete-time LPV systems using switched observers. Journal of Franklin Institute, 353(13): 3176–3191, 2016.