A motion-coupled spaceborne laser communication terminal fixed-time disturbance control method

By designing a fixed-time anti-interference control method in the laser communication terminal, the problem of pointing control under multi-source interference is solved, achieving fast and accurate pointing control, which is suitable for laser communication terminals in complex environments.

CN116736707BActive Publication Date: 2026-04-24BEIHANG UNIV
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Patent Information

Application Number
CN202310676709.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-08
Publication Date
2026-04-24
Estimated Expiration
2043-06-08

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively achieve rapid pointing control of laser communication terminals under multi-source interference from space environment disturbances, floating satellite platform coupling torque, and shaft friction torque. Traditional methods fail to fully consider the influence of pointing mechanism coupling torque and satellite attitude motion, resulting in insufficient control performance.

Method used

A fixed-time anti-interference control method for a spaceborne laser communication terminal under motion coupling is designed. By establishing a deep coupling model, using interference estimation compensation and feedback suppression techniques, and combining a fixed-time controller, a rapid estimation and compensation of multi-source interference is achieved, ensuring that the pointing control meets the accuracy requirements within a fixed time.

Benefits of technology

It achieves fast and accurate pointing control of laser communication terminals under multi-source interference, has strong robustness, and can converge control errors within a fixed time. It is suitable for communication terminal systems with multi-source interference and fast pointing requirements.

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Abstract

The present application relates to a kind of motion coupling under spaceborne laser communication terminal fixed time disturbance control method, for the periscope type laser communication terminal fast pointing control problem under the influence of multi-source disturbance such as space environment interference, floating satellite platform coupling moment and rotation shaft friction moment, first, the deep coupling model of spaceborne communication terminal containing above-mentioned multi-source disturbance is established, and multi-source disturbance is regarded as total disturbance moment by analyzing interference structure and characteristics;Second, fixed time disturbance observer is designed to quickly estimate the total disturbance moment suffered by communication terminal;Third, nominal fixed time controller is designed and combined with disturbance observer to form fixed time compound anti-interference controller;Finally, combined with the pointing time demand of communication terminal, observer and controller parameter selection are analyzed and guided, and fixed time anti-interference control of spaceborne laser communication terminal under motion coupling is completed.The control method of the present application has the characteristics of strong robustness, fast pointing speed and guaranteeing pointing error fixed time convergence.
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