摘要
精确着陆于火星特定目标区域是未来火星着陆探测的关键技术。面向火星精确着陆需求,研究火星进入过程中基于器间测量的实时高精度导航方法具有重要意义。该方法利用火星已有的环绕探测器,在着陆器接近进入过程中,通过无线电链路获得量测信息,结合器上滤波算法实时估计着陆器的位置与速度状态。仿真结果显示该导航方法可有效提高进入过程中的导航精度。
Precision landing on Mars is the key technology for the future Mars missions. To reduce landing error, a novel navigation method that uses tracking data from other orbiters is studied. The tracking data would provide pseudo range and range-rate data which are used in UKF processing to estimate the lander＇s real-time navigational parameter during the lander entry phase. A numerical simulation has validated the benefits to Mars entry navigation from this method.
出处
《航天返回与遥感》
2012年第6期17-23,共7页
Spacecraft Recovery & Remote Sensing
基金
上海市科委课题(10dz1110100)资助
关键词
火星着陆
自主导航
器间测量
无迹卡尔曼滤波
Mars landing
autonomous navigation
radio tracking
unscented Kalman filter
