南京理工大学学报（自然科学版）2019，Vol.43Issue(5)：640-646,7.DOI:10.14177/j.cnki.32-1397n.2019.43.05.014
充液挠性航天器液体晃动模态观测及滑模姿态控制
Sloshing mode observer and sliding mode attitude control for liquid-filled flexible spacecraft
摘要
Abstract
Aiming at solving the problems of appendages’ vibration and liquid sloshing during attitude maneuvering of the liquid-filled flexible spacecraft,a sliding mode variable structure control method with steady-state liquid slosh compensation is proposed here. Based on the Lyapunov theory, an improved variable structure attitude control law is designed. To reduce the chattering,the symbol function is replaced by the square root function. Considering the small sloshing frequency and damp-ing ratio of the liquid,in order to improve the performance of attitude stabilization control,a liquid sloshing mode observer is designed to reduce the influence of liquid sloshing in the steady state process. The simulation results show that the proposed control method can effectively improve the steady-state pointing accuracy and the stability of the attitude of the liquid-filled flexible spacecraft.关键词
充液挠性航天器/滑模变结构/姿态控制/观测器Key words
liquid-filled flexible spacecrafts/sliding mode variable strncture/attitude control/observers分类
信息技术与安全科学引用本文复制引用
虞文杰,朱志浩,钟晨星,王璐,郭毓..充液挠性航天器液体晃动模态观测及滑模姿态控制[J].南京理工大学学报（自然科学版）,2019,43(5):640-646,7.基金项目
国家自然科学基金(61973167 （）
61773211 （）
61673214 （）
61673219) （）
江苏省重点研发计划项目(BE2017161) （BE2017161）
江苏高校优势学科建设工程项目 （）
