Research on optimum design of temperature-vibration accelerated storage test plan

摘要：

　　In allusion to the phenomenon that single stress is being used to conduct accelerated storage test currently, in order to establish a reasonable accelerated storage test program, an optimization design method of temperature and vibration step-down-stress accelerated storage test based on cumulative damage method was proposed.The minimum asymptotic variance of products medium life estimated value at normal working stresses is taken as optimum target, each accelerated stress level as design variable.Meanwhile, employing maximum likelihood estimation theory for fisher matrix, the mathematic model of multi-stress accelerated storage test plans optimal design was built.Comparing the minimum asymptotic variance of each scheme by an example of space electric connector, k =5 is determined to be the optimal scheme.Using Monte-Carlo simulation to analyze volatility of minimum asymptotic variance and mean minimum asymptotic variance, it further proves the scheme when k is 5 to be optimal.The optimized test plan can not only solve optimization design and evaluation for small sample accelerated storage test, but also can ensure the accuracy of evaluation, reduce test times, shorten test time and save cost.

关键词： electromechanical products multiple stresses step-down-stress accelerated storage test optimum design the minimum asymptotic variance

作者: Zhou Jie Yao Jun Su Ouan Hu Honghua

作者单位: School of Reliability and System Engineering, Beihang University, Beijing, China College of Automation, Guilin University of Aerospace Technology, Guilin, China

会议类型: 国际会议

会议名称: the International Conference Vibroengineering-2014

会议地点: 贵阳

会议语种:英文

页码: 63-68

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）