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�������պ����ѧѧ�� 2012, Vol. 38 Issue (1) :22-27    DOI:
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Autonomous pulsars navigation method based on ASUKF for Mars probe
Ning Xiaolin, Ma Xin, Zhang Xueliang, Wu Jinyuan*
School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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ժҪ �����ǵ����ɿ����ȶ������ȸ�, ��ʵ�ֻ���̽����������������Ч�ֶ�֮һ.��������ǵ��������嵽��ʱ���΢С��������޴��λ�ù��������һ����,�����һ�ֻ�����άUnsented�������˲�(ASUKF,Augmented State Unscented Kalman Filter)�Ļ���̽����������������������,��������λ�á��ٶȺ����嵽��ʱ��ij�ֵ���������Ϊ״̬���ĵ���ϵͳ��ѧģ��,���ڶ�̽����λ�á��ٶȽ��й��Ƶ�ͬʱ��Ч���Ʋ��������嵽��ʱ��ij�ֵ�������,�����������������Ӱ��.�����������÷����ĵ�����λ���ȿɴ�350m����,�����������̽��������������Ҫ.
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Abstract�� Autonomous navigation using pulsars is characterized by its steady, credible performance, high navigation accuracy, which is suitable for mars probe. Because errors in photons time of arrival reduce location accuracy, a kind of pulsars navigation method based on ASUKF (augmented state unscented Kalman filter) was presented. System models using position, velocity and constant error in time of arrival as state parameters were built. The method could not only estimate and correct the constant error in photons time of arrival, but reduce the influence of random error as well. Simulations show that a estimated position error within 350m is obtained, which demonstrates this method can satisfy the requirements of Mars exploration.
Keywords�� pulsars   autonomous navigation   Mars exploration   augmented state unscented Kalman filter(ASUKF)     
Received 2010-09-02;
Fund:

������Ȼ��ѧ����������Ŀ(60874095,60736025); ������������������Ŀ; ���������㲩ʿ����ָ����ʦ������Ŀ(YB20091000601); ����973�ƻ�������Ŀ(2009CB724002)

About author: ������(1979-),Ů,ɽ��������,������,ningxiaolin@buaa.edu.cn.
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������, ����, ��ѧ��, �����.����ASUKF�Ļ���̽����������������������[J]  �������պ����ѧѧ��, 2012,V38(1): 22-27
Ning Xiaolin, Ma Xin, Zhang Xueliang, Wu Jinyuan.Autonomous pulsars navigation method based on ASUKF for Mars probe[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V38(1): 22-27
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