This paper investigates the problem of robust guaranteed cost fault-tolerant control for networked control system with norm-bounded uncertain parameters. Both network-induced delay and data packet dropout are taken into consideration, and data packet dropout is regard as a kind of special delay. The synthetical delay is a interval time-varying delay, and possesses fast time-varying characteristic, namely, the derivative of delay is more than 1 and is difficult to determine the upper bound. Based on state feedback control strategy and the Lyapunov-Krasovakii approach, the delay-dependent robust guaranteed cost fault-tolerant control sufficient condition against sensor failures is derived. Because the Lyapunov-Razumikhin approach is not used and the lower bound of delay is introduced, the results possess less conservativeness. Meanwhile, the design approach of the optimal controller are given. Finally, an example is used to illustrate the effectiveness and the feasibility of proposed approach.

In this paper, the problem of robust integrity considering actuator structural failures for a class of uncertain nonlinear networked control system (NNCS) subject to actuator saturation is investigated. By utilizing the delay-dependent Lyapunov method and convex combination expression of input saturation function, the less conservative stability criteria and the approach of robust fault-tolerant state feedback controller are derived for the control problem. By introducing a definition of the fault-tolerant attraction domain and solving an optimization problem with LMIs constraints, the maximum fault-tolerant attraction domain can be estimated. The key features of the proposed approach include the use of a tighter bounding technique for reducing conservativeness and the introduction of augmented matrix items into the Lyapunov-Krasovakii functional for reducing computational demand. Finally, an example is used to illustrate the effectiveness and the feasibility of proposed approach.

This paper investigates the problem of robust integrality for networked control system with norm-bounded parameter uncertainties. Both network-induced delay and data packet dropout are taken into consideration, and data packet dropout is regard as a kind of special delay. A new type of Lyapunov-Krasovakii functional is proposed which contains some triple-integral terms. Based on dynamic output feedback control strategy, a delay-dependent robust integrality sufficient condition against actuator failures is derived in terms of integral inequality technique. Because the model tranformation is not used and the lower bound of delay is introduced, meanwhile, we don't ignore some useful items when estimating the upper bound of derivative of Lyapunov-Krasovskii function, the results possess less conservativeness. Moreover, the design approach of the controller are given via solving linear matrix inequalities. Finally, an example is used to illustrate the effectiveness and the feasibility of proposed approach.