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�������պ����ѧѧ�� 2011, Vol. 37 Issue (2) :220-222    DOI:
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Online calibration based on in-flight alignment and optimal design
Zhang Xiaoyue, Yang Gongliu, Zhang Chunxi*
School of Instrument Science and Opto_electronic Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� The navigation system precision was influenced by the output error of fiber optic gyro(FOG) inertial measurement unit(IMU). In order to complement ground calibration, FOG strapdown inertial navigation system(SINS) online calibration was carried out in airborne guidance weapon in-flight alignment process. In-flight alignment/online calibration model of FOG-SINS was introduced, based on which the Kalman filter was designed. Simulation analysis of error excitation and influence on navigation precision were carried out, and filter optimal design was completed. At last, the simulation results with or without optimal design were obtained which indicated that: FOG-SINS free inertial navigation precision was improved after optimal design.
Keywords�� fiber optic gyro   in-flight alignment   online calibration   optimal design     
Received 2009-12-03;


About author: ��СԾ(1982-),��,����������,��ʦ,zhangxiaoyue@buaa.edu.cn.
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Zhang Xiaoyue, Yang Gongliu, Zhang Chunxi.Online calibration based on in-flight alignment and optimal design[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(2): 220-222
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