A switched LPV observer for actuator fault estimation. Issue 26 (2015)

• Record Type: Journal Article
• Authors: Nguyen, M.Q.; Sename, O.; Dugard, L.
• Is Part Of: IFAC-PapersOnLine. Volume 48:Issue 26(2015)
• Page Start: 194
• Page End: 199
• Publication Date: 2015
• Subjects: Multiplicative fault -- fault estimation -- switched extended observer -- LPV system; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2015.11.136
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: In this paper, an actuator fault estimation problem is tackled, based on the LPV approach. First, the actuator fault is modeled in the form of a multiplicative fault by using a constant coefficient representing the loss of efficiency of the actuator's power α. Therefore, the estimation of a time varying faulty actuator can be transformed into the estimation of a constant coefficient α. Then, the faulty system is rewritten in the form of a switched LPV system. The coefficient α and the system states are estimated using an extended switched observer. The stability and performance of the observer is ensured considering a switched time-dependent Lyapunov function. The observer gains are derived based on LMI solutions for polytopic switched systems. Some simulation results are presented that show the effectiveness of this approach.