Journal of Systems Engineering and Electronics ›› 2014, Vol. 25 ›› Issue (5): 877-885.doi: 10.1109/JSEE.2014.00101

• CONTROL THEORY AND APPLICATION • Previous Articles     Next Articles

Fault reconstruction observer design for continuous-time systems with measurement disturbances via#br# descriptor system approach

Qingxian Jia1,*, Yingchun Zhang1,2, Chengliang Li1, and Xueqin Chen1   

  1. 1. Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150001, China;
    2. Aerospace Dongfanghong Development Ltd, Shenzhen 518057, China
  • Online:2014-10-23 Published:2010-01-03


This paper addresses a problem of observer-based sensor fault reconstruction for continuous-time systems subject to sensor faults and measurement disturbances via a descriptor system approach. An augmented descriptor plant is first formulated, by assembling measurement disturbances and sensor faults into an auxiliary state vector. Then a novel descriptor state observer for the augmented plant is constructed such that simultaneous reconstruction of original system states, sensor faults and measurement disturbances are obtained readily. Sufficient conditions for the existence of the proposed observer are explicitly provided, and the application scope of the observer is further discussed. In addition, an extension of the proposed linear approach to a class of nonlinear systems with Lipschitz constraints is investigated. Finally, two numerical examples are simulated to illustrate the effectiveness of the proposed fault-reconstructing approaches.