强迫绕飞无控旋转目标的控制策略

Control strategy of forced flying-around uncontrolled rotating targets

针对无控旋转目标航天器强迫绕飞的控制策略问题,强迫绕飞时要求追踪器对无控旋转目标器具备视线指向的能力,以便在较短的时间内进行全面观测。首先分析了无控旋转目标的姿态及运动特性,在视线旋转坐标系上建立了追踪器与目标器的三维相对运动方程。将追踪器对目标器的绕飞问题转化为视线瞬时旋转平面内的二维控制问题,采用基于模糊切换增益调节的滑模控制器对视线方向和垂直视线方向的目标运动进行了控制。数值仿真验证了所提控制策略的有效性。

Aiming at the control strategy problem of forced flying-around uncontrolled rotating target spacecraft, forced flying-around requires the chaser to have line of sight pointing ability on the uncontrolled rotating target in order to observe it comprehensively in a relatively short time. Firstly, the attitude and motion characteristics of the uncontrolled rotating target are analyzed, the three-dimensional relative motion equations of the chaser and the target are established on the line of sight rotation coordinate system. The problem of chaser flying around the target is turned into a two-dimensional control problem in the instantaneous plane of the line of sight rotation. The sliding mode controller based on fuzzy switching gain adjustment is used to control the movement of targets on the line of sight direction and the vertical line of sight direction. The effectiveness of the proposed control strategy is verified by numerical simulation.