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�������պ����ѧѧ�� 2012, Vol. 38 Issue (5) :670-674    DOI:
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Fusion algorithm for transient loading volume with accumulative error
Wang Xinfeng, Wang Hongzhi, Gao Minzhong*
Jiuquan Satellite Launch Center of China, Jiuquan 732750, China

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Abstract�� In order to improve measuring accuracy of rocket propellant loading volume, an ultrasonic flowmeter and a high precision liquid-level meter were added to the original loading-system based on the single flowemeter. The relationship between the liquid-level and the volume was calibrated in advance. Thus, the loading volume was measured with three devices at the same time. Through analyzing the variation characteristic and error characteristic of the three measurement data, variance estimations of the three loading volume error were deduced respectively using time-domain estimation and data window, and the optimal weighted fusion algorithm was given using the least squares method. Practical application shows that the fusion algorithm is able to inhibit the expansion of accumulative error, offer more precise real-time loading volume data.
Keywords�� loading volume   transient   accumulative error   fusion   variance estimation     
Received 2011-01-07;
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���·�, ����־, ������.�����ۻ����ЧӦ��˲���ע���ں��㷨[J]  �������պ����ѧѧ��, 2012,V38(5): 670-674
Wang Xinfeng, Wang Hongzhi, Gao Minzhong.Fusion algorithm for transient loading volume with accumulative error[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2012,V38(5): 670-674
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2012/V38/I5/670
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