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�������պ����ѧѧ�� 2009, Vol. 35 Issue (11) :1287-1289    DOI:
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1. �������պ����ѧ ����ϵͳ����ϵ, ���� 100191;
2. �Ϻ���ҫ�����������޹�˾, �Ϻ� 201203
Optimization method of schemes of engine groups based on system reliability
Huang Min1, Yang Jun1, Zhao Yu2*
1. Dept. of System Engineering of Engineering Technology, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Shanghai MicroPowers Ltd, Shanghai 201203,China

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Abstract�� The power equipment of a large system consists of three engines, which has two kinds of design scheme: cold standby and down-rating. The cold standby design scheme is that two engines run in power rating and the left one is reserved; after one failure, the cold reserved engine is switched. Yet the down-rating design scheme is that three engines work at the same time, once one fails, the other two run in power rating. On condition that each engine-s life distribution follows the different Weibull distributions, the reliability models were established for these two design schemes. Based on the life distributions of engines in power rating situation and down rating situation, the time-varying reliability curves of these two design schemes were given. Then according to the comparison with the two design scheme-s reliability curves with time varying, the better design scheme was chosen. At the end, the example shows that the method is reasonable.
Keywords�� reliability model   cold standby   derating   reliability curve     
Received 2008-10-17;
About author: �� ��(1968-),Ů,����������,������,hm@buaa.edu.cn.
�� ��, �� ��, �� ��, ����Ƽ.����ϵͳ�ɿ��ȵķ������鷽���Ż�ѡ�񷽷�[J]  �������պ����ѧѧ��, 2009,V35(11): 1287-1289
Huang Min, Yang Jun, Zhao Yu, Tang Suping.Optimization method of schemes of engine groups based on system reliability[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(11): 1287-1289
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2009/V35/I11/1287
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