Fault tolerant control for a class of nonuniformly sampled-data systems

This paper preliminarily investigates the problem of fault tolerant control for nonuniformly sampled-data systems. Firstly, based on the analysis that the adaptive fault diagnosis observer is not appropriate for sampled-data systems, a novel augmented fault estimation observer is developed to simultaneously estimate continuous-time state and fault by use of discrete-time nonuniformly sampled output. Using the on-line fault and state information, a sampled-data state feedback fault tolerant controller which is nonuniformly updated is designed to guarantee the stability of closed-loop system in presence of faults. Finally simulation results are presented to illustrate the efficiency of the proposed method.