Robust fault detection in hybrid systems using set-membership parameter estimation★. Issue 21 (2015)

• Record Type: Journal Article
• Authors: Maïga, M.; Ramdani, N.; Travé-Massuyès, L.
• Is Part Of: IFAC-PapersOnLine. Volume 48:Issue 21(2015)
• Page Start: 296
• Page End: 301
• Publication Date: 2015
• Subjects: Bounded error -- hybrid systems -- interval analysis -- nonlinear systems -- estimation -- reachability -- uncertain systems; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2015.09.543
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: Hybrid systems exhibit continuous and discrete dynamics and are encountered in many complex and safety-critical systems. Due to their complex nature, the fault diagnosis task becomes very challenging. In this paper, we present a method to perform fault detection with a nonlinear hybrid system using set-membership parameter estimation in a bounded-error framework. Our method relies on a consistency test between the feasible parameter set as computed in normal fault-free operation or given as nominal, and the feasible parameter set as estimated during on-line operation over a given time horizon. Hence, a fault is detected if the feasible set for the parameter vector estimated online is inconsistent with nominal values. An illustrative example is presented.