摘要
针对电动力绳系轨道机动控制与系绳稳定控制互相耦合的问题,提出通过结构设计使二者解耦控制的方法。采用多段系绳结构,通过调节不同段系绳中电流的大小和方向,使轨道机动和系绳稳定实现独立控制。分析气动阻力作用下的系绳运动规律,设计控制器来调节系绳中的电流以抑制系绳通电时产生的偏心力矩和初始扰动所引起的系绳天平动。最后进行了仿真研究,结果表明:气动阻力作用下惯性系绳以初始扰动为幅值在平衡位置作等幅振荡;和传统单段系绳结构相比,基于多段系绳结构设计的控制器能够以较小的电流实现系绳的稳定控制。
To realize orbit maneuver and suppress the libration independently of the electrodynamic tether through modulating the tether current,multi-segment structure is designed.The libration of the tether is analyzed in the presence of the aerodynamic drag,and the controllers are designed to suppress the libration caused by the eccentric moment and the initial disturbance.At last,the simulations are done to verify performance of the controllers.The results show that the tether under the aerodynamic drag is marginally stable; and the controller based on the multi-segment structure could accomplish the stability of the tether by use of a small current.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2014年第3期291-297,共7页
Journal of Astronautics
基金
国家自然科学基金(61021002)
民用航天预先研究项目资助
关键词
电动力绳系
气动阻力
稳定控制
多段系绳结构
Electrodynamic tether
Aerodynamic drag
stability control
Multi-segment structure
