空间飞行器视线坐标系悬停最优控制  

Optimal Control for Spacecraft Hovering Based on Line-of-sight Coordinate Frame

作　　者：沈昱恒[1] 侯明善[1] 

机构地区：[1]西北工业大学自动化学院,西安710072

出　　处：《航天控制》2010年第5期40-44,50,共6页Aerospace Control

摘　　要：研究了指定相对位置的共轨道面悬停控制问题。由于空间悬停任务具有时间持续性特点,不可忽略控制模型中存在的地球引力场非线性影响。因此,从精确非线性视线相对运动方程出发,提出了基于θ-D非线性次优算法的悬停闭环控制方法。数值仿真验证了该方法的有效性,消除了初始位置、速度和角度误差,并适用于圆轨道和椭圆轨道上的悬停控制任务。The control strategy of hovering at the pointed position for a target spacecraft is researched,which is based on a coplanar line-of-sight（LOS） related dynamic model.For the ease of achieving hovering with the help of relative range and angle,a precise LOS model is adopted in control design process.Due to the LOS model＇s time variability and nonlinear influence that could not be ignored in a long time hovering mission,an optimal closed-loop control strategy is presented by using the Theta-D suboptimal control method.The numerical simulations for the target spacecraft on circular and elliptical orbits are both given to validate the control law.

关 键 词：悬停 视线 非线性 次优控制 

分 类 号：TP273.1[自动化与计算机技术—检测技术与自动化装置]