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In this paper, a class of time delayed nonlinear systems is considered where both parametric uncertainty and structural uncertainty are involved. The delay is time-varying and the unknown parameters are embedded in the system nonlinearly. The only limitation on the structural uncertainty is that its bound is known. A sliding mode observer is proposed to estimate the system state and an adaptive law...
Considering a class of networked control systems with long time delays, the fault detection is carried out when the control delays are present between the controller and the actuator. Firstly, a modeling approach of networked control system is presented, and the state estimate error equation is given by constructing the fault observer. And then, based on Lyapunov stability theory, a linear matrix...
The problem of the delay-dependent observer-based control for networked control systems is described under the concerns of the synthesis effect of sampled-data, network induced delay, packet dropout and disordering. By using the lyapunov-krasovskii functionals, delay dependent criteria are given to guarantee the stability of the delay dependent observer-based control systems. In terms of linear matrix...
Based on observer, delay-dependent robust H∞ controller design problem for time-delay systems with a class of nonlinear uncertainties is discussed in the paper. Assuming that the nonlinear uncertain functions in the considered model are gain-bounded, we obtain a sufficient condition for the robustly asymptotic stability and H∞ performance of the closed-loop system in the light of Lyapunov stability...
An observer-based robust H∞ control for a class of linear uncertain neutral-type systems is presented in this paper. Based on Lyapunov-Krasovskii theory, a delay-dependent condition for the existence of a linear full-order robust H∞ controller is constructed. By the singular value decomposition (SVD) approach, the result can be expressed in terms of a set of strict linear matrix inequalities (LMIs)...
In this paper, the fault detection problem for nonlinear networked control systems (NCSs) with packet dropout and delay is investigated. A nonlinear stochastic systems model is proposed to account for the NCSs with random packet dropout and network-induced time-varying delay in both from sensor to controller (S/C) and from controller to actuator (C/A). Based on the obtained NCSs model, employing observer-based...
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