Safety control method of network motion control system with quantization

Abstract

A safety control method of a network motion control system with quantization comprises the following steps of modeling a network control system, and building a state equation and an output equation; performing dimension expansion on the state equation of the network control system; designing an intermediate observer; and designing a linear matrix inequality solution, estimating a gain matrix L, and designing a controller. By the safety control method, attacks of an executor and a sensor can be simultaneously detected, a quantization effect is prevented by adjusting a special parameter, an intrusion-tolerant controller is designed according to an estimation value, so that the state of a closed-loop system is uniformly and ultimately bounded, and the safety running 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 quantization, which can simultaneously detect the attacks of actuators and sensors and suppress the quantization effect by adjusting specific parameters, and according to the estimated value The intrusion-tolerant controller is designed to make the state of the closed-loop system consistent and finally bounded, so as 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 developed prosperously and are widely used in 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 a...

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

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