Extended state observer control method and system based on airborne optoelectronic tracking system

By constructing a fifth-order extended state observer and introducing a first-order filter in the airborne optoelectronic tracking system, the problem of reduced tracking accuracy caused by attitude disturbances and high-frequency vibrations is solved, better disturbance suppression effect is achieved, and the tracking accuracy and anti-disturbance capability of the system are improved.

CN120595559BActive Publication Date: 2025-09-30JILIN HENGHUI PRECISION CONTROL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511100701.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-07
Publication Date
2025-09-30
Estimated Expiration
2045-08-07

AI Technical Summary

Technical Problem

In airborne optoelectronic tracking systems, the tracking accuracy is reduced due to the influence of attitude disturbances and high-frequency vibrations. Traditional PID algorithms are difficult to effectively suppress nonlinear disturbances.

Method used

An extended state observer control method based on an airborne optoelectronic tracking system is adopted. By establishing a mathematical model, constructing a fifth-order extended state observer, and introducing the differential equation of a first-order filter, a speed loop controller is designed to suppress attitude disturbances and high-frequency vibrations.

Benefits of technology

The tracking accuracy of the optoelectronic tracking system has been improved, and the anti-interference ability to low-frequency and high-frequency disturbances has been enhanced. The parameters can be easily adjusted and are suitable for various actual working conditions.

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Abstract

This invention relates to an extended state observer control method and system for an airborne optoelectronic tracking system. This method belongs to the technical field of servo control systems. It addresses the technical problem of reduced tracking accuracy in airborne optoelectronic tracking systems due to the influence of attitude disturbances and high-frequency vibrations. A mathematical model of the airborne optoelectronic tracking system is established; the state-space equation of the airborne optoelectronic tracking system is derived based on the mathematical model; the differential equation of the first-order filter is introduced into the state-space equation of the airborne optoelectronic tracking system, and a fifth-order extended state observer is reconstructed; the fifth-order extended state observer is proved to have Lyapunov stability, and the conditions for its asymptotic stability are solved. The fifth-order extended state observer is then adjusted based on these conditions; a velocity loop controller is designed based on the expected frequency method, and the velocity observed by the fifth-order extended state observer is introduced into the controller through feedback, ultimately achieving a closed-loop system.
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