Fault detection for networked systems with uncertain time delay and packet dropout using delta operator
This paper addresses the problem of observer based fault detection for networked control systems (NCSs) with uncertain time delays and data packet dropouts. The uncertain time varying delays and packet dropouts of NCSs are modeled as parameter uncertainties of the NCSs and a stochastic variable satisfying Bernoulli distribution, respectively. Combining with the delta operator theory, a new discrete model is constructed to depict the behavior of the NCSs. Then, based on the established model, an observer based H fault detection filter is proposed to guarantee the stability of the delta operator system and the sufficient conditions of the H performance for the filtering error system are derived with linear matrix inequalities (LMIs) and Lyapunov Krasovskii functional technique. The parameters of the filter are solved via LMI toolbox. A simulation example is provided to illustrate the effectiveness of the proposed method.
2016 IEEE 11th Conference on Industrial Electronics and Applications (ICIEA)