Observer-based fault-tolerant control for a class of networked control systems with transfer delays

Abstract

In this paper, an observer-based fault-tolerant control (FTC) method is proposed for a class of networked control systems (NCSs) with transfer delays. Markov chain is employed to characterize the transfer delays. Then, such kind of networked control systems are modelled as markovian jump systems. An observerbased FTC scheme using the delayed state information and the estimated fault value is presented to guarantee the stability of the faulty systems. An inverted pendulum example is used to illustrate the efficiency of the proposed method.

Consensus of networked multi-agent systems via the networked predictive control and relative outputs

“…Analogously, consensus results corresponding to Theorem 4.1 and Corollary 4.3 can be easily obtained for DNMAS (12). That is to say, for DNMAS (12) with a directed topology G and constant network delay t40, protocol (13) solves the consensus problem if and only if A-LC and I NÀ1 AÀðL 22 À1 NÀ1 L 12 Þ ðBKÞ are Schur.…”

“…and set initial conditions to be For DNMAS (12) with a fixed topology G and constant network delay t40, by estimating and predicting each agent's state, Tan et al [26] have provided necessary and sufficient conditions of achieving consensus when exact outputs of system (12) are measured. As discussed in Remark 2, all results drawn in this paper are correct on the premises of [26].…”

Reliable H∞ control for uncertain nonlinear discrete-time systems subject to multiple intermittent faults in sensors and/or actuators

“…Usually, all reported FTC studies can be divided into two categories: active FTC (AFTC) [5][6][7][8][9][10][11] and passive FTC (PFTC) [12][13][14][15][16][17][18]. To achieve the purpose of AFTC, fault detection and diagnosis, which itself also draws considerable concern in control community [19,20], is necessary to provide real-time fault information to reconfigure the controller.…”

Integrated fault‐tolerant control methodology for non‐linear dynamical networked control systems subject to time‐varying delay

“…Georges et al [27] proposed an active FTC scheme based on interacting multiple model algorithm for a linear NCS with packet losses. Mao et al [28] use Markov chain to characterise the transfer delays, and then present an observer-based FTC scheme for linear NCSs with large delays. For the purpose of real-time application in industrial automation, Ding et al [29] developed an active FTC framework for a wireless linear NCS, and it makes an integrated design of controllers, FDI units and networks.…”