无拖曳航天器连续推力分配的伪逆法二次优化方案  

Optimizing Continuous Thrust Allocation of a Drag Free Spacecraft with Pseudo-Inverse Method

作　　者：刘睿[1] 周军[1] 

机构地区：[1]西北工业大学精确制导与控制研究所,陕西西安710072

出　　处：《西北工业大学学报》2017年第6期948-953,共6页Journal of Northwestern Polytechnical University

基　　金：航天科工支撑基金(2015-HT-XGD)资助

摘　　要：主要研究了应用伪逆法进行无拖曳航天器连续推力分配时的二次优化方法。首先,根据伪逆法初值求取方法,得出其解存在推力为负和超出执行机构约束饱和限制情况的结论;然后提出了伪逆法二次优化两步方案,针对推力为负提出了利用推力器间的关联关系进行替代的方法,针对推力器约束饱和限制确定了约束上下限。最后,通过干扰跟踪仿真和推力输出仿真,此二次优化方案满足了推力器输出为正和输出限幅的要求,并且计算简单,可以实现在轨实时分配,也可应用于其他需要连续推力的航天器推力分配任务。According to the initial value solution procedures of the pseudo-inverse method, reach the conclusion that its solutions may have negative thrust or exceed the saturation constraints of the thruster of a drag-free spacecraft. Then we put forward the two-step optimization method and build up the relations between thrusters. If the output of one thruster is negative, we replace it with a coherent thruster to assure all its outputs are positive. If the saturation constraints of the thruster are exceeded, we determine the upper and lower boundaries of the saturation constraints to make sure all the outputs for the thruster are within the threshold. Finally, we simulate the interference tracking and the thrust output of the drag-free spacecraft. The simulation results show that our optimization method can satisfy the output requirements of the thruster and realize the real-time continuous thrust allocation of the drag-free spacecraft.

关 键 词：无拖曳航天器 推力分配 伪逆法 二次优化 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] V448.2[自动化与计算机技术—控制科学与工程]