Composite control and error suppression for space opto-electronic tracking turntable considering friction characteristic compensation

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-10-03 DOI:10.1016/j.ast.2025.110939

Chaoyong Guo , Ruoying Liu , Lei Tong , Yucong Xiong , Jikui Liu , Qiang Zhang

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引用次数: 0

Abstract

Space opto-electronic turntables are increasingly utilized in space situational awareness missions and high-speed laser communication. However, during full-range maneuvers, these turntables experience significant nonlinear friction forces due to the axis system and friction generated by the conductive ring. These friction forces exhibit drastic changes when the speed exceeds zero, resulting in error spikes. Additionally, the turntable has a structural characteristic of large inertia, which contributes to lagging tracking errors. In order to suppress the tracking error and improve the dynamic performance of the space opto-electronic turntable, this paper proposes a composite control strategy that integrates friction characteristic observation and compensation with position feedforward. The model of friction load such as conductive rings is identified and observed, and the friction torque is reconstructed and compensated by the LuGre model. Furthermore, a composite feedforward control is implemented to mitigate the tracking hysteresis error. The effectiveness of the proposed method is verified through simulation and experimentation. The results demonstrate that the composite control method integrated friction characteristic observation and compensation with position feedforward significantly improves the control bandwidth and obviously reduces the tracking error of the opto-electronic turntable servo system. This innovative control strategy not only advances the performance of opto-electronic turntables but also holds significant implications for the design of other high-performance pointing and tracking servo systems in various applications.

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考虑摩擦特性补偿的空间光电跟踪转台复合控制与误差抑制

空间光电转盘越来越多地应用于空间态势感知任务和高速激光通信。然而，在全范围机动，这些转盘经历显著的非线性摩擦力由于轴系统和摩擦产生的导电环。当速度超过零时，这些摩擦力表现出剧烈的变化，导致误差峰值。此外，转台具有大惯性的结构特性，导致了滞后跟踪误差。为了抑制空间光电转台的跟踪误差，提高其动态性能，提出了一种将摩擦特性观测与补偿与位置前馈相结合的复合控制策略。对导电环等摩擦载荷模型进行识别和观测，利用LuGre模型对摩擦力矩进行重构和补偿。此外，采用复合前馈控制来减小跟踪滞后误差。通过仿真和实验验证了该方法的有效性。结果表明，将摩擦特性观测与补偿与位置前馈相结合的复合控制方法显著提高了控制带宽，显著减小了光电转台伺服系统的跟踪误差。这种创新的控制策略不仅提高了光电转盘的性能，而且对各种应用中其他高性能指向和跟踪伺服系统的设计具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.