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�������պ����ѧѧ�� 2007, Vol. 33 Issue (08) :920-924    DOI:
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Fault tolerant architecture design of EHA
Ma Jiming, Fu Yongling*
School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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ժҪ һ�廯��Һ������(EHA, Electrical Hydrostatic Actuator)�ǹ��ʵ紫(PBW, Power by Wire)�ɿز���ϵͳ��һ����,Ϊ�˱�֤�����ɿ�ϵͳ�Ŀɿ���,������ö���Ƚṹ����.�ɿ�ϵͳ�ֱ�ӿɿ��ȡ�����ɹ��ʡ���Ⱥ͹��Ϲ���ˮƽ�Լ����ܡ������ȽǶ������EHA�����ָ��Ҫ��,���������ָ��Ҫ��,��EHA������ɲ��ֵ�ʧЧ�ʽ����˼���.���ݼ�����,���һ�ֿ��е�EHA�ݴ�ṹ,�ֱ����������EHA���ϵ��µ������ж���(PMA, Probability of Mission abort)��ʧ����(PLOC, Probability of Loss of Control).�������������ֽṹ��ʽ�ܹ�����ɿ�ϵͳ���������ɿ��ȵ�Ҫ��.������ѡ�õĿɿ���ģ��,��Ƴ������ݴ������Ķ��������ϵͳ,���Դ��ݴ�ṹ��������ϸ����.
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Abstract�� The integrated EHA (electrical hydrostatic actuator) is an important component of the PBW (power by wire) flight control system. Fault tolerant architecture design is necessary to improve the whole reliability of flight control system. Performance parameters were offered by the demand of reliability, mission abort, redundancy, failure management level, performance, weight and size. The failure rate about each EHA-s component was calculated. Based on the calculation result, a feasible fault tolerant architecture of EHA was selected. Then the probability of mission abort and loss of control results from the EHA-s failure were calculated separately. Calculation results show that the fault tolerant architecture can meet the flight control system-s reliability requirement. Detail design about EHA-s architecture was given based on the selected EHA-s reliability model, and this kind of EHA system-s function was described in particular.
Keywords�� power by wire   electrical hydrostatic actuator   redundancy   reliability     
Received 2006-10-20;


About author: �����(1979-),��,�����ܿ���,��ʿ��,Jiming.ma@buaa.edu.cn.
�����, ������.һ�廯��Һ�������ݴ�ṹ���[J]  �������պ����ѧѧ��, 2007,V33(08): 920-924
Ma Jiming, Fu Yongling.Fault tolerant architecture design of EHA[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(08): 920-924
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