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1. �������պ����ѧ ���տ�ѧ�빤��ѧԺ, ���� 100191;
2. �й��ռ似���о�Ժ ���岿, ���� 100094
Disturbance modeling and parameters identification of reaction wheel assembly on spacecraft
Zhang Pengfei1, Cheng Wei1, Wang He1, Zhao Yu2*
1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Department of Integration Engineering, China Academy of Space Technology, Beijing 100094, China

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Abstract�� An improved disturbance model was proposed to predict the effects of reaction wheel assembly (RWA) micro-disturbance on the spacecraft. Because the disturbance amplification by excitation of the structure modes was the most dominating effect on spacecraft attitude accuracy by RWA, the improved model expressed the effect of the structure-s nature frequency to disturbance by introducing amplification coefficients. As the nonlinear characteristic of improved model, simulated annealing genetic algorithm was used to identify the parameters of improved model. A rigid six-axis test bed was designed, and the disturbance of RWA was measured. The improved model as well as the results of parameters identification was validated by experimental data. The experimental results show that the improved model captures the disturbance characteristic precisely, and simulated annealing genetic algorithm can improve the identification accuracy.
Keywords�� reaction wheel assembly   modeling   parameters identification   simulated annealing   genetic algorithms     
Received 2009-05-31;
Fund:

���տ�ѧ����������Ŀ(20071551016)

About author: ������(1986-),��,�ӱ�������,˶ʿ��,zhangpf@ase.buaa.edu.cn.
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������, ��ΰ, ����, ����.���������������Ŷ���ģ��������ʶ[J]  �������պ����ѧѧ��, 2010,V36(7): 879-882
Zhang Pengfei, Cheng Wei, Wang He, Zhao Yu.Disturbance modeling and parameters identification of reaction wheel assembly on spacecraft[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2010,V36(7): 879-882
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