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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

Active Publication Date: 2021-02-26
ZHEJIANG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

Due to the inevitable uncertainty in the network, quantization processing is required in the process of equipment exchange information and data sampling, which will lead to signal distortion and make it difficult for the observer to make accurate estimates of system parameters
In view of the inevitable influence of quantization, and the existence of quantization will inevitably lead to the decline of system stability performance, these factors will inevitably seriously affect the estimation accuracy of actuator attacks and sensor attacks
At present, there is no effective solution to the safety control problem of networked motion control system with quantization

Method used

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

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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 ...

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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.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B23/02
CPCG05B23/0243G05B2219/24065
Inventor 朱俊威吴珺冯宇俞晓天
Owner ZHEJIANG UNIV OF TECH
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