天基光学短弧观测约束域的粒子群优化定轨方法

摘要

In order to determinate the orbit of space objects,an orbit-determination method with particle swarm optimization (PSO)using space-based optical short-arc observation in admissible region was proposed.The concepts of the attributes,the admissible region and the construction of optimization-function were introduced.A method with PSO for searching best key to optimization-function was proposed to avoid the problem of various keys,local optimizations and mass calculations.An orbit-determination course was simulated with 3rd part software to validate the correctness of the proposed orbit-determination method.Simulation results indicate the proposed method with PSO reaches more precise orbit without various keys and mass calculations,the performance of proposed method is close to Crame-rao low bound.%针对空间目标定轨问题，提出一种利用两段天基光学短弧观测数据的粒子群优化定轨新算法。在介绍天基光学短弧观测测量帧集、测量约束域及目标函数构造的基础上，为解决已有的基于网格搜索思想寻优的算法存在的多解、局部最优解及运算量过大等问题，提出了一种利用粒子群优化算法在约束域内对目标函数值寻优达到定轨目的的新算法。对算法的性能进行了仿真验证。多次仿真结果表明：该算法大大降低了计算量，且有效地解决了目标函数多解和局部最优解问题，对目标定轨的精度与定轨算法的克拉美罗下限接近。