基于积分终端滑模的SGCMG伺服系统抗干扰控制
收稿日期: 2024-06-03
修回日期: 2024-07-11
录用日期: 2024-08-20
网络出版日期: 2024-09-02
基金资助
国家自然科学基金(62273040)
Anti-interference control of a single-frame controlled moment SGCMG servo system based on integral terminal sliding mode
Received date: 2024-06-03
Revised date: 2024-07-11
Accepted date: 2024-08-20
Online published: 2024-09-02
Supported by
National Natural Science Foundation of China(62273040)
单框架控制力矩陀螺（SGCMG）是空间飞行器姿态控制的重要组成部分。对柔性隔振器和太空中存在的未知干扰影响，设计了一种基于积分终端滑模控制器（ITSMC）和有限时间干扰观测器（FTDO）的复合控制方案，它能够消除柔性隔振器中存在的不确定干扰，并在收敛时间内达到期望速度。与传统PI控制器相比，设计的积分终端滑模的波动幅度和振荡频率更低，稳态误差≤0.032，调节时间快40%，超调量降低24%，抗扰能力更强；在积分末端滑模控制器上设计有限时间观测器进行抗干扰补偿，组成的复合控制器稳态误差再次缩小不超过0.003，超调量降低至1%，具有低抖震、强抗干扰效果，对于空间中存在的未知干扰进行了有力的消除。最后，通过MATLAB仿真验证了上述方法可以达到预期效果。
鲁明 , 宿诺 , 赵维珩 , 曹歌 , 田利梅 , 张强 . 基于积分终端滑模的SGCMG伺服系统抗干扰控制[J]. 航空学报, 2024 , 45(S1) : 730768 -730768 . DOI: 10.7527/S1000-6893.2024.30768
The Single Gimbal Control Moment Gyroscope （SGCMG） is a crucial component in spacecraft attitude control. To address the impact of flexible isolators and unknown disturbances in space， a composite control scheme based on Integral Terminal Sliding Mode Control （ITSMC） and Finite-Time Disturbance Observer （FTDO） has been designed. This scheme effectively eliminates the uncertain disturbances present in flexible isolators and achieves the desired velocity within the convergence time. Compared to traditional PI controllers， the designed integral terminal sliding mode controller exhibits lower fluctuation amplitude and oscillation frequency， with a steady-state error ≤ 0.032， a 40% faster adjustment time， and a 24% reduction in overshoot， demonstrating stronger disturbance rejection capabilities. Additionally， a finite-time observer is designed for disturbance compensation on the integral terminal sliding mode controller， resulting in a further reduction of steady-state error to ≤ 0.003 and an overshoot reduced to 1%. The composite controller shows low chattering and strong disturbance rejection， effectively eliminating unknown disturbances in space. Finally， MATLAB simulations confirm that the proposed method achieves the desired performance.
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