A New Diagnosis Approach of Hybrid Systems through Observers and Hybrid Automata

Abstract

This paper gives a new approach of fault detection and isolation of hybrid dynamical systems based on hybrid observers and hybrid automata; a methodology for the design of dynamical observers has been proposed. The hybrid observer composed of two blocks: a location observer that identifies the current mode and a continuous observer that detects faults. Although this approach is interesting, it is still unable to detect instantly the change of the continuous state; as a result and in case of a fault, the system can't identify correctly the defected mode. In this paper, a new version is proposed to improve this approach and reach good diagnosis results.