An electromechanical system anti-interference control method based on a cascade nested EID estimator

By designing a cascaded nested EID estimator, and employing a multi-stage state observer and a low-pass filter, high-precision interference estimation and compensation under low bandwidth is achieved. This solves the system instability problem caused by noise amplification in existing technologies and improves the anti-interference performance and reliability of electromechanical systems.

CN117348407BActive Publication Date: 2026-07-14JIANGSU UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU UNIV OF TECH
Filing Date
2023-10-30
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing electromechanical system anti-interference methods suffer from high bandwidth, which amplifies noise when noise is present in the measurement signal, affecting system stability and reliability. Existing technologies cannot simultaneously achieve both anti-interference performance and noise suppression.

Method used

This paper proposes an anti-interference control method for electromechanical systems based on a cascaded nested EID estimator. The method employs a multi-level state observer and EID estimator, combined with a low-pass filter and feedback control, to generate a composite control input. The system state and external disturbances are progressively estimated through a nested structure, and noise is filtered out to achieve high-precision interference compensation.

Benefits of technology

It improves the anti-interference performance and control accuracy of electromechanical systems at lower bandwidths, reduces the impact of noise, improves system reliability, and effectively suppresses the impact of interference on electromechanical systems.

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Abstract

The application provides an anti-interference control method for electromechanical systems based on cascade nested EID estimators, which comprises the following steps: establishing a state equation of the electromechanical system under external interference and measurement noise; designing multiple state observers with different control inputs according to the established state equation, which are used for observing the state of the system; designing multiple EID estimators with cascade nested structures, which are used for estimating the external interference; designing a low-pass filter in each EID estimator, which is used for filtering the noise in the interference estimation value; and designing an interference compensation strategy according to the interference estimation value output by each EID estimator, which generates multiple composite control inputs for inhibiting the influence of the interference on the electromechanical system. The application has the beneficial effects that: in the measurement noise environment, the accuracy of the interference estimation and compensation can be improved by increasing the number of the cascade nested EID estimators, the influence of the measurement noise on the system can be effectively inhibited, and the control accuracy and reliability of the electromechanical system are improved.
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