空间相对悬停轨道闭环控制方法研究

Study of Close-loop Control Method for Spacecraft Relative Hovering Orbit

空间相对悬停轨道在空间操作中具有重要的作用。提出了一种相对圆轨道目标星任意位置的悬停闭环控制方法,并基于李雅普诺夫方法设计了反馈系数,解决了由于Hill方程线性化误差导致开环控制难以保持悬停效果的问题。实验结果表明,在服务星上增施加少量的额外燃料,可以实现服务星相对目标星长时间、高精度、稳定的悬停,并通过数值仿真验证了该方法的有效性。

The hovering orbit plays an important role in space operation. A close-loop control method of hovering at any position to the target satellite is proposed for circular orbit target, and the feedback is designed based on the Lyapunov method. The problem that it＇s hard to maintain the hovering caused by Hill Equation＇s error in the open-loop control is solved. The result shows that it can hover long, highly precise and stable to the target satellite though exert a little more fuel on the servicing satellite. Numerical simulation is performed and the method is validated.