摘要
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。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;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;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。
Here,taking complex spacecraft attitude control system as the study object,characteristics of disturbance torque caused by sail flexibility and liquid sloshing in closed-loop of attitude control system were analyzed considering complexity of spacecraft with flexible sails and liquid-filled tanks.Firstly,based on the virtual power method,the overall dynamic equations of complex spacecraft were established,and dynamic equations of sail vibration and liquid sloshing were also established.Then,the phase plane control law was used to complete the closed-loop control simulation of complex spacecraft attitude,and data acquisition was performed for disturbance torque caused by sail flexibility and liquid sloshing.Finally,based on the variational mode decomposition method,the time-frequency analysis was performed for time domain data of disturbance torque to obtain its disturbance characteristics,and provide a theoretical basis for designing subsequent disturbance suppression algorithm.Mathematical simulation results showed that the proposed method is applicable and accurate.
作者
林晓冬
张锐
刘芳
兰青
LIN Xiaodong;ZHANG Rui;LIU Fang;LAN Qing(Innovation Academy for Microsatellites,CAS,Shanghai 201203,China;University of Chinese Academy of Sciences(CAS),Beijing 100049,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第13期303-309,共7页
Journal of Vibration and Shock
关键词
变分模态分解(VMD)
帆板挠性
液体晃动
相平面控制
variational mode decomposition(VMD)
sail flexibility
liquid sloshing
phase plane control
作者简介
第一作者:林晓冬,男,硕士生,副研究员,1988年生;通信作者:张锐,男,博士生,研究员,1974年生。
