Collaborative design method of fault detection filter and controller under DoS attack

Abstract

The invention discloses a cooperative design method of fault detection filter and controller under DoS attack. The method is applied to a USV course control system, and is a cooperative design methodof a fault detection filter and an elastic event trigger controller based on a state observer, and the method comprises the following steps of: establishing a mathematical model based on the state observer USV control system under the influence of an actuator fault, a DoS attack and a network delay; introducing an event trigger mechanism related to the state of the observer, and establishing the model of the USV control system capable of simultaneously describing the time delay of the network transmission and the influence of the event trigger mechanism by using the time-delay system theory, determining an event trigger matrix W of the USV control system model, a state observer gain matrix L1, L2, a fault detection filter gain matrix V1, V2 and a controller gain matrix K; establishing a fault detection filter and an elastic event trigger controller based on a state observer under the DoS attack. The cooperative design method of fault detection filter and controller under DoS attack caneffectively resist the DoS attack and detect the fault in time.

Description

technical field [0001] The invention relates to the technical field of networked control systems, and is applied in a USV (Unmanned Surface Vehicle, unmanned surface vehicle) course control system, and in particular relates to a fault detection based on an observer under a DoS (Disk Operating System, disk operating system) attack Co-design approach for filters and elastic event-triggered controllers. Background technique [0002] In recent years, the security control of network control systems has become a major research hotspot. Network control systems often adopt distributed control methods, and the collected dynamic information and various control signals are transmitted through network communication channels. As the network becomes more and more open The higher the network size and the continuous expansion of the network scale, this will inevitably increase the possibility of network attacks, such as spoofing attacks and denial of service attacks. Denial of service attac...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the security control of network control systems has become a major research hotspot. Network control systems often adopt distributed control methods, and the collected dynamic information and various control signals are transmitted through network communication channels. As the network becomes more and more open The higher the network size and the continuous expansion of the network scale, this will inevitably increase the possibility of network attacks, such as spoofing attacks and denial of service attacks. Denial of service attacks will occupy communication channels, consume network bandwidth, and cause normal communication to be blocked; If the transmission is blocked, the entire control system may be unstable, which brings new problems to the research of control theory.

Due to the inevitable existence of transmission delays and faults in network communication, this also brings new challenges to networked control

Images