伪谱法在SGKW轨道快速优化中的应用  

Application of Pseudo-spectral Method in Rapid Orbit Optimization for SGKW

作　　者：胡正东[1] 丁洪波[1] 曹渊[1] 郭才发[1] 蔡洪[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《航天控制》2009年第4期3-7,共5页Aerospace Control

基　　金：国防科技大学优秀研究生创新资助项目(B070103)

摘　　要：天基对地打击动能武器(SGKW)用于从太空对地面高价值战略目标进行快速、准确的打击。针对作战实时性要求,探讨了基于伪谱法的SGKW轨道快速优化技术,该方法的实质是将最优控制问题转化为非线性规划问题。为了提高优化计算的快速性,提出了轨道分段生成的策略,即首先根据参考配点获得满足落点要求的再入点参数,再将求得的再入点参数作为终端约束并运用序列二次规划算法对过渡段进行优化。仿真结果验证了上述方案的有效性。The space-to-ground kinetic weapon （ SGKW ） is mainly used to strike the ground strategic targets accurately and rapidly from space. According to the combat requirement of real-time capability, rapid orbit optimization for SGKW is discussed based on pseudo-spectral method which translate optimal control problem into nonlinear programming problem in essence. To improve the rapidity of optimization calcula- tion, a solution by orbit subsection generation is presented. Firstly the reentry parameters meeting the re- quirement of point of fall are figured out following reference collocation points. And then the transition orbit is optimized using sequential quadratic programming under terminal constraints determined by reentry pa- rameters. Simulation results show effectiveness of the method stated.

关 键 词：SGKW 伪谱法 轨道快速优化 轨道分段生成 参考配点 序列二次规划 

分 类 号：V474.28[航空宇航科学与技术—飞行器设计]