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�������պ����ѧѧ�� 2007, Vol. 33 Issue (04) :459-462    DOI:
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1. �������պ����ѧ ����ϵͳ����ϵ, ���� 100083;
2. ��154��, ��Ʒ���̲�, ���� 550009
Statistical analysis of step-stress accelerated life testing for repairable product
Li Xiaoyang1, Jiang Tongmin1, Li Meijun2*
1. Dept. of System Engineering of Engineering Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Department of Product Engineering, 154 Factory of China National Guizhou Aviation Industry Co. Ltd., Guiyang 550009, China

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Abstract�� During step-stress accelerated life testing (SSALT), in order to evaluate life and reliability characteristics of repairable product, the equation principle of accumulative hazard functions under two different stress levels was put forward. On the base of the rule, time conversion function was presented. After failure data were converted to the same stress condition by the way of iterative algorithm, the three-parameter Weibull process that includes the position element with Peck accelerated model was utilized to fit them. This model assumed "minimal repairing" such that any repair had no impact on the failure rate. By the use of maximum likelihood estimation, life and reliability of repairable system under normal stress conditions could be extrapolated. Residual distribution sampling was used to generate the two simulation examples. Results show that the model and method proposed is not only good at parameter evaluation with high accuracy in comparison with the traditional,but also can be applied to reliability growth testing.
Keywords�� reliability   life   random processes   repair   statistical methods   estimation   accelerated testing     
Received 2006-05-19;
Fund:

"ʮһ��"Ԥ����Ŀ(51319030301)

About author: ������(1980��),Ů,���ݹ�����,��ʿ��,leexy@dse.buaa.edu.cn
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������, ��ͬ��, ��÷�B.���޲�Ʒ�IJ���Ӧ��������������ͳ�Ʒ���[J]  �������պ����ѧѧ��, 2007,V33(04): 459-462
Li Xiaoyang, Jiang Tongmin, Li Meijun.Statistical analysis of step-stress accelerated life testing for repairable product[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(04): 459-462
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