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	利用火星卫星光学测量实现火星探测器自主导航
	马鹏斌 ; 宝音贺西 ; 沐俊山 ; MA Peng-bin ; BAOYIN He-xi ; MU Jun-shan
	2016-03-30 ; 2016-03-30
关键词	火星探测器 火星卫星 光学测量 自主导航 Mars prober Martian moon optical observation autonomous navigation V448.23
其他题名	Autonomous navigation of Mars probe based on optical observation of Martian moon
中文摘要	以火星探测为例,提出了通过对火星卫星进行光学测量实现火星探测器自主导航的方法。该方法在火星探测器上搭载光学相机,在飞向火星过程中对火星天然卫星(Phobos,火卫一;Deimos,火卫二)拍摄带有恒星背景的图像;通过恒星位置确定精确的惯性指向,利用得到的光学观测数据完成对火星探测器的自主导航。分别给出了基于扩展卡尔曼滤波(EKF)和无迹卡尔曼滤波(UKF)进行自主导航的方法和仿真计算结果。数据显示:EKF和UKF得到的结果基本一致,说明EKF在线性化过程中损失精度并不多。在巡航段后半程,与火星距离越近,导航精度越高。距离火星(1~5)×107 km时,取数据间隔为1min,如果测量精度为0.1″,导航精度可达10~100km量级,速度精度为0.01m/s量级;如果测量精度为1″,导航精度也相应要低一个量级。另外,单独使用火卫二的导航精度要高于单独使用火卫一,联合使用火卫一和火卫二的精度最高。仿真计算结果表明,利用火星卫星光学测量的火星探测器自主导航,可满足火星探测器高精度导航的要求。; By taking Mars probing for an example,an autonomous navigation method for a Mars probe based on the optical observation of Martian moon is proposed.By carrying the Mars probe on an optical camera,the method uses the camera to take the images for natural satellites of the Mars(Phobos, Deimos)and their backgrounds in the process of flying to Mars.The star position is used to determine precisely inertial pointing,then,the autonomous navigation of Mars is completed by obtained right ascension and declination data from optical observation.The sequential estimation algorithms based on Extended Kalman Filter(EKF)and Unscented Kalman Filter(UKF)are given.The results show thatthe precision of EKF is similar to that of the UKF,which means that the precision loss of the EKF is not much in the linearization process.At cruising in the second half,the closer is the camera to Mars, the higher the navigation precision is.When the distance is(1-5)×107 km from Mars and the data interval is set to be 1min,the navigation accuracy can reach 10-100km magnitude,and the speed accuracy is 0.01m/s.When the measurement precision is 0.1″,the navigation precision is lowered an order of magnitude.In addition,the navigation precision of Deimos alone is higher than that of the Phobos,and both of them to be used will get the highest accuracy.Simulation computation results show that the autonomous navigation for Mars detectors by the Martian moon optical measurement can satisfy the requirement of high precision navigation.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/143673]
专题	清华大学
推荐引用方式 GB/T 7714	马鹏斌,宝音贺西,沐俊山,等. 利用火星卫星光学测量实现火星探测器自主导航[J],2016, 2016.
APA	马鹏斌,宝音贺西,沐俊山,MA Peng-bin,BAOYIN He-xi,&MU Jun-shan.(2016).利用火星卫星光学测量实现火星探测器自主导航..
MLA	马鹏斌,et al."利用火星卫星光学测量实现火星探测器自主导航".(2016).

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