H _∞ fault‐tolerant control of networked control systems with actuator failures

Abstract

The problem of H ∞ fault-tolerant control for networked control systems (NCSs) with actuator failures is addressed in this study. The authors consider the network-induced delays, including sensor-to-controller delay and controller-to-actuator delay, to have both an upper bound and a non-zero lower bound. By using a sampled-data approach, a new model is formulated based on the updating instants of the ZOH. They derive the criteria which ensure that the sample-data NCS is stable with H ∞ norm γ . The authors design the H ∞ fault-tolerant controller that guarantees the closed-loop NCS stability with H ∞ norm γ , when all control components are operational, as well as when some actuators fail to operate. Simulation examples are given to show the effectiveness and less conservative needs of the proposed method.

Advances in Gain-Scheduling and Fault Tolerant Control Techniques

“…Recent research has also dealt with the same problem for networked control systems [340]. However, when the magnitude of the fault goes beyond the range considered for the design, the H ∞ norm performance can no longer be guaranteed.…”

Model‐free fault‐tolerant control approach for uncertain state‐constrained linear systems with actuator faults

“…Because actuator failures may result in severe degradation of system performance, the study on accommodating actuator failures and maintaining system performance has gained considerable attention from the research community. The methods and techniques that were developed to address the presence of actuator failures in control systems can be broadly classified into two categories: passive approaches [1][2][3][4][5] and active approaches [6][7][8][9][10]. The former approaches mainly use fixed controllers to control systems, and the latter approaches compensate for actuator faults by utilizing control reconfiguration to adjust controllers online.…”

Energy‐efficient distributed control of large‐scale systems: A switched system approach

“…According to the activation process in Figure 3, we have ³ . Moreover, one also sees from Figure 3 that the closed-loop system (22) can be modelled as a switched systems with two subsystems. In this simulation, We run experiment for 100 time steps.…”

“…Also, the switched system approach was proposed in [11] to model the NCS with time-delay, and the explicit relation between the control performance and the occurrence frequency of long delay has been established. For more latest works on NCSs, readers can refer to [12][13][14][15][16][17][18][19][20][21][22][23] and the references therein.On the other hand, the last decades have witnessed an increase interest in modelling and controlling the dynamical systems with large scale and complexity. A large-scale system is often considered as a set of interconnected subsystems and referred to as large-scale interconnected systems.…”