Results and perspectives on fault tolerant control for a class of hybrid systems

Abstract

This article addresses the fault tolerant control (FTC) issue for a class of hybrid systems (HS) modelled by hybrid automata. Two kinds of faults are considered: continuous fault that affects each continuous system mode; discrete fault that affects the switching conditions. In these two faulty cases, the FTC design has two main objectives: (1) maintain the continuous performances including various stabilities of the origin and the output tracking/regulation behaviours along the trajectories of HS; (2) maintain the discrete specifications that have to be followed by HS, e.g. a desired switching sequence. The following three FTC methodologies are considered: FTC for HS with continuous stability goal; FTC for HS with discrete specifications; supervisory FTC design via hybrid control techniques. Some perspectives are also provided. This article provides the readers a survey on the main techniques that can be used to achieve these FTC goals of HS.

Keywords:

• fault diagnosis
• fault tolerant control
• hybrid systems
• switched systems
• discrete event systems

Acknowledgements

This work is partially supported by International campus on safety and intermodality in transportation (CISIT), Natural Science Foundation of China (60874051, 61034005), Natural Science Foundation of Jiangsu Province (BK2010072), NUAA Research Funding (NZ2010003, S1012-031).