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基于测速测角敏感器的火星探测器自主导航方法研究
刘瑞霞, 张剑桥
哈尔滨工业大学 卫星技术研究所, 哈尔滨 150001
摘要:
提出了一种基于天体光谱红移测速和利用星光敏感器测角的测速测角组合导航新方法。该方法与现在的深空探测器导航方法相比,优势明显:一是无需太复杂的轨道动力学模型,简单易行。二是不需要依赖地面的无线电信息,无时延。最重要的是消除了测角导航方法引入的微分误差和测速导航方法引入的积分误差,可以实现精确天文自主导航,满足深空导航连续自主、实时高精度的基础要求。针对该导航方法,首先完成了轨道动力学模型和量测模型的建立工作,然后根据模型的非线性特点,分别采用扩展卡尔曼滤波算法完成了对该组合自主导航方法的研究。最后,对该方法进行仿真验证,通过对仿真结果的分析可以发现,测速测角组合自主导航方法满足巡航段的导航精度指标要求。
关键词:  测速测角;联邦滤波;深空探测
DOI:10.15982/j.issn.2095-7777.2016.03.004
分类号:
基金项目:国家重点基础研究发展计划(2014CB744205)
Research on Autonomous Navigation Algorithms for the Mars Probe via Speed and Angle Measurement Sensors
LIU Ruixia, ZHANG Jianqiao
Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150001, China
Abstract:
In this paper a new navigation method is proposed, which is based on using red shift to measure speed and using star sensor to measure angle. Compared with the existing autonomous navigation methods, this method does not rely on radio message and complicated orbital dynamics model. It has the advantage of highly independent, easy to implement and without time delay. By using this method, the differential error caused by measuring angle method and the integral error caused by measuring speed method can be eliminated, then make precise astronomical autonomous navigation come true to meet the basis of deep space requirements for autonomous navigation, real-time and high precision. Firstly, the orbit dynamics model and the measurement model are established. Secondly, due to the nonlinear characteristics of the model, EKF is used to complete the autonomous navigation for Mars probe. Finally, a numerical example is established to illustrate the effectiveness of the proposed control approach and by analyzing, it can find that this method satisfies the requirement of navigation precision of cruise phase.
Key words:  velocity and angular measurement;federal filter;deep space exploration