基于变分模态分解的复杂航天器姿态扰动分析

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摘要本文以复杂航天器姿态控制系统为研究对象，在考虑航天器配置挠性帆板和充液贮箱的复杂情况下，对姿态控制系统闭环中由于帆板挠性和液体晃动产生的干扰力矩进行特性分析。首先基于虚功率法建立复杂航天器整体动力学方程，同时建立帆板振动和液体晃动动力学方程；然后采用相平面控制律完成复杂航天器姿态闭环控制仿真，对帆板挠性和液体晃动产生的干扰力矩进行数据采集；最后基于变分模态分解法对扰动力矩时域数据进行时频分析得到其扰动特性，为后续扰动抑制算法的设计提供理论基础。通过数学仿真结果表明该方法的适用性和准确性。

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	林晓冬1
	2
	张锐1
	2
	刘芳1
	兰青2

关键词 ：变分模态分解, 帆板挠性, 液体晃动, 相平面控制

Abstract：Attitude control system of complex spacecraft is taken as the research object. Considering the complex situation of the flexible panel and liquid storage tank of spacecraft, the characteristics of the interference torques caused by the flexible panel and liquid sloshiness in the closed loop of the attitude control system are analyzed. Firstly, the dynamic equations of the complex spacecraft were established based on the virtual power method, and the dynamics equations of the vibration and liquid sloshiness of the spacecraft were also established. Then, the phase plane control law is used to complete the closed-loop control simulation of complex spacecraft attitude, and the interference torques generated by the flexibility and liquid sloshiness are collected. Finally, based on the variational mode decomposition method, the time-frequency analysis of the time domain data of the disturbance torque is carried out to obtain its disturbance characteristics, which provides a theoretical basis for the design of the subsequent disturbance suppression algorithm. Simulation results show the applicability and accuracy of the proposed method.

Key words： Variational modal decomposition Flexibility of sailboard Liquid slosh Phase plane control

收稿日期: 2022-05-23 出版日期: 2023-07-15

引用本文:

林晓冬1,2，张锐1,2,刘芳1，兰青2. 基于变分模态分解的复杂航天器姿态扰动分析[J]. 振动与冲击, 2023, 42(13): 303-309.
LIN Xiaodong1,2, ZHANG Rui1,2, LIU Fang1, LAN Qing2. Attitude disturbance analysis for complex spacecraft based on variational mode decomposition. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(13): 303-309.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I13/303

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