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一种平面约束辅助测量的深空探测器自主天文导航方法
马辛1,2, 宁晓琳1,2, 刘劲2, 刘刚1,2
1.北京航空航天大学 前沿科学技术创新研究院, 北京 100191;2.北京航空航天大学 仪器科学与光电工程学院, 北京 100191
摘要:
深空探测任务中自主导航测量误差是影响深空探测自主导航系统精度的主要影响因素。针对抑制自主导航测量误差的问题,提出一种平面约束辅助测量的深空探测器自主天文导航方法,该方法在对系统非线性不等式几何平面约束建模的基础上,利用序列二次规划(Sequential Quadratic Programming,SQP)非线性规划方法,对深空探测器自主天文导航系统的非线性不等式约束进行非线性规划,直接辅助减小深空探测器自主导航系统的量测误差;利用CKF-SQP量测优化非线性约束滤波方法,对深空探测器自主导航系统的状态进行估计,进一步减小系统随机误差。仿真结果表明:所提方法可以有效抑制测量误差,实现深空探测器高精度自主导航。该方法可为深空探测器提供一种可行的高精度自主导航方法。
关键词:  深空探测;自主导航;天文导航;非线性约束;SQP算法
DOI:10.15982/j.issn.2095-7777.2019.03.014
分类号:V448.2
基金项目:国家自然科学基金(61703022,61873196,61233005);国家973计划项目(2014CB744202);中国博士后科学基金面上资助(2016M600027)
An Autonomous Celestial Navigation Method for Deep Space Probe Based on Coplanar Constraint Aided Measurement
MA Xin1,2, NING Xiaolin1,2, LIU Jin2, LIU Gang1,2
1.Research Institute of Frontier Science, Beihang University, Beijing 100191, China;2.School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China
Abstract:
Measurement error is the main factor that affects the accuracy of the autonomous navigation system for deep space exploration. In this paper,aiming at restraining the measurement error of autonomous navigation system,an autonomous celestial navigation method of deep space probe based on coplanar constrained auxiliary measurement is proposed. Based on the model of the system nonlinear inequality geometric plane constraints, Sequential Quadratic Programming (SQP) is used to deal with the nonlinear inequality constraints of deep space probe autonomous celestial navigation system,which directly aids in reducing the measurement error of the deep space probe autonomous navigation system. CKF-SQP,nonlinear constrained filtering method with measurement optimization, estimates the states of deep space probe autonomous navigation system to further reduce the system random error. Simulation results show that the proposed method can effectively suppress the measurement error and achieve highprecision autonomous navigation of deep space probes. The method can provide a feasible high-precision autonomous navigation method for deep space probe.
Key words:  deep space exploration;autonomous navigation;celestial navigation;nonlinear constraints;SQP