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�������պ����ѧѧ�� 2000, Vol. 26 Issue (5) :516-518    DOI:
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Application of  H Filtering to Fast Ground Alignment of Inertial Navigation Systems
WANG Yan-dong, FAN Yue-zu*
Beijing University of Aeronautics and Astronautics, Dept. Of Automatic Control

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Abstract�� The approach of ��H filtering is presented, which is applied to alignment of inertial navigation systems. The error model of INS(Inertial Navigation System) is introduced,and the observability of the INS error model is analyzed. ��H filter is designed to an observable subsystem. The simulation results of alignment are given in the condition of bounded noise variance and unknown noise statistics.The results show that ��H filtering is robustness and it is less sensitive to uncertainty in the noise signals statistics than Kalman filtering. It is demonstrated that ��H filtering is efficient to alignment of inertial navigation systems. In order to improve the velocity of alignment, a fast estimation method of the azimuth error angle is proposed for the initial alignment of INS . The simulation results illustrate the efficiency of the method.
Keywords�� inertial navigation   Kalman filtering   detectability   H filtering     
Received 1999-05-17;
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���޶�, ��Ծ��.H�˲��ڹߵ�ϵͳ������ٶ�׼�е�Ӧ��[J]  �������պ����ѧѧ��, 2000,V26(5): 516-518
WANG Yan-dong, FAN Yue-zu.Application of  H Filtering to Fast Ground Alignment of Inertial Navigation Systems[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2000,V26(5): 516-518
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