绳系拖曳离轨过程中的摆动抑制策略

摘要

以周向常值连续小推力作用下的绳系拖曳离轨为背景，针对离轨过程中的系绳摆动抑制问题，建立了系统质心轨道动力学方程及系绳摆动动力学方程，分析了无系绳收放控制时的系绳摆动特性以及系绳收放对系绳摆动的作用效果，构造了使系绳摆动衰减的期望绳长收放速率并设计了系绳张力控制律。仿真结果表明：无系绳收放控制时，系绳摆动表现为平衡位置附近的周期性往复运动；张力控制连续平滑，很好地实现了系绳实际长度对期望长度的跟踪，同时有效地抑制了离轨过程中的系绳摆动。%The dynamic equations of system centroid orbit and tether oscillation were established.And the dynamic characteristics of tether oscillation without tether control and the effects of tether control on tether oscillation were analyzed.An expect rate of tether which suppress tether oscillation was constructed and tether tension control law was designed.Simulation results indicate that when there is no tether control,tether oscillation is in periodic reciprocating motion around the equilibrium position.The tether tension control is continuous and smooth,which makes tether actual length keep well track of the expected length,and the tether oscillation is suppressed effectively at the same time.