Active Fault-Tolerant/Active Passive Intrusion-Tolerant    H   ∞    Cooperative Control of Discrete NCS under the Background of Big Data

Wang Jun,Meng Xiao-Li,Thippa Reddy G

doi:10.1155/2021/9258411

Abstract

For the linear discrete networked control system (NCS) which may suffer DoS attack on both sides of the controller, when the actuator has time-varying failure, the intelligent sensor unit uses wireless sensors to collect data. According to the large amount of data collected, the active fault tolerance/active passive capacity of linear discrete NCS under the discrete event-triggered communication mechanism (DETCS) is studied. The problem of cooperative controller design is discussed. Firstly, a linear discrete NCS model integrating DETCS, actuator fault, and network attack is established. Then, based on the idea of integral sliding mode control, an active fault-tolerant/attack active passive intrusion-tolerant cooperative controller is designed, and the actuator attack side network attack and sensor side network attack are extended to the state to obtain a new state vector. Then, an adaptive Kalman filter estimator (AKF) estimates the fault and attack information and then adjusts the initial fault-tolerant/intrusion-tolerant cooperative controller in real time according to the estimated information obtained by the adaptive Kalman filter estimator; finally, the MATLAB simulation example is used to verify the improvement of system performance by the designed control law and the saving of network resources by the introduction of DETCS.

Highlights

Compared with the traditional control system, networked control system (NCS) has the unique properties of remote operation, remote monitoring, security detection and resource sharing due to the existence of networks
Due to the existence of networks, the structure of the control system is more complex, the data transmission will be affected to a certain extent, the system is more prone to component failure, and network transmission is more vulnerable to attack, so the physical fault tolerance is very important The research of intrusion control and network attack tolerance control has great practical significance and practical application value [1,2,3]
Fault-tolerant control (FTC) technology is divided into passive fault-tolerant control (PFTC) [4,5,6] and active fault-tolerant control (AFTC) [7,8,9,10]

Summary

Introduction

Compared with the traditional control system, NCS has the unique properties of remote operation, remote monitoring, security detection and resource sharing due to the existence of networks. Reference [11] studies the stability of control and measurement packets transmitted over a communication network under DoS attack. For NCS with actuator failure and network attack coexisting, the research on comprehensive security control of fault tolerance and intrusion tolerance is rarely involved, and only literature [14] and literature [15] can be consulted at present. In view of this, aiming at the actuator fault and DoS network attack on both sides of the controller, this paper establishes a closed-loop linear NCS fault/attack coexistence model by constructing the active fault-tolerant/active passive intrusion-tolerant system structure of NCS under DETCS with the help of the joint modeling method of network attack and controlled object. The active fault-tolerant control is used to compensate the actuator network attack with the active intrusion-tolerant strategy, and the passive intrusiontolerant mechanism is used to be robust to the sensor network attack, so as to realize the state feedback and active fault-tolerant and active passive intrusion-tolerant cooperative control

Material and Method

Related Lemmas

Analysis

Result and Discussion

Conclusion