A security control method for a networked motion control system with quantization

A motion control system and networked control technology, applied in the field of network security, can solve problems such as system stability performance degradation, signal distortion, and impact on the accuracy of sensor attack estimation

CN110794811BActive Publication Date: 2021-02-26ZHEJIANG UNIV OF TECH
7 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-02-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A safety control method for a networked motion control system under the influence of quantification, comprising the following steps: modeling the networked control system, establishing a state equation and an output equation; expanding the dimension of the state equation of the networked control system; designing an intermediate Observer; design a linear matrix inequality to solve the estimated gain matrix L and design a controller. The invention can detect the attack of the actuator and the sensor at the same time, suppress the quantitative effect by adjusting specific parameters, and design an intrusion-tolerant controller according to the estimated value, so that the state of the closed-loop system is consistent and finally bounded, and the safe operation of the system is guaranteed.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of network security, and in particular relates to a security control method for a networked motion control system under the influence of quantification. The intrusion-tolerant controller is designed to make the state of the closed-loop system consistent and ultimately bounded to ensure the safe operation of the system. Background technique

[0002] With the advancement of computer control technology and the rapid replacement of electronic hardware equipment in recent years, networked control systems have flourished and are widely used in the process of industrial practice. The mature application of industrial Ethernet has brought great progress to the motion control system, and the high-precision coordinated motion between the motion axes is a necessary basis for realizing complex functions. The networked motion control system improves the reliability and security of the traditional control system, but beca...

Examples

Embodiment Construction

[0058] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described below with reference to the accompanying drawings and simulation data.

[0059] refer to Figure 1 to Figure 3 , a security control method for a networked motion control system in a quantitative environment. The method first models the motion control system, considers that the actuators and sensors are attacked at the same time, constructs an intermediate observer, and directly adjusts the value of specific parameters by The influence of quantization is suppressed, and the actuator attack and sensor attack are estimated at the same time, and the intrusion-tolerant controller is designed according to the estimated value, so that the state of the closed-loop system is consistent and eventually bounded.

[0060] The present invention is a safety control method for a networked motion control system in a ...