基于最小二乘法的月球探测器自主导航  

Autonomous Navigation of Lunar Probe Using Least Square Algorithm

作　　者：母方欣[1] 方群[1] 罗建军[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《计算机仿真》2007年第11期45-47,共3页Computer Simulation

摘　　要：对于地月转移轨道的月球探测器,其受力复杂,轨道动力学方程难以精确建立,因此难以应用已有的基于轨道动力学方程的滤波方法对其进行自主导航。文中提出了以太阳和恒星的天文信息为观测量,采用迭代最小二乘法进行纯几何解析定位来实现月球探测器自主导航的方法。最后还对定位结果的优化的进行了研究。通过数学仿真分析了敏感器精度、观测星个数等因素对定位精度的影响,结果表明这种方法简单可靠,可以作为深空探测自主导航的滤波方案的初值。In the cislunar transfer orbit, the probe is attracted by many bodies, its equation cannot be founded precisingly. This paper presents a deep space autonomous navigation method which uses the geometrical localization algorithm based on least square to obtain probe＇s position. Finaly, it provides a method for optimizing the positioning result. Simulation is used to analyse the influencing factors on positioning precision. Result shows that this method is simple and realiable and can be used as the initial value of kallman filter in deep space autonomous navigation.

关 键 词：自主导航 月球探测器 最小二乘法 几何法定位 

分 类 号：V448.224[航空宇航科学与技术—飞行器设计]