雷达板级双应力交叉步降加速退化试验优化设计

针对某型雷达板级的性能往往受到多个应力的影响,且在加速退化试验中该产品有限试验时间内难以获得大量性能退化信息的问题,提出一种雷达板级双应力交叉步降加速退化试验优化设计方法。采用Monte-Carlo对加速试验进行仿真模拟,在样本量大小一定的条件下,以监测频率、应力水平数、监测次数作为设计变量,以总的试验费用作为约束条件,以正常使用应力下的p阶分位寿命渐进方差估计作为目标函数,建立下双应力交叉步降加速退化试验优化设计模型。通过仿真实例,验证了该方法的有效性、可行性。

Optimization design of radar board laver double-cross-step-down-stress accelerated degradation test

According to the fact that the performance of the radar board laver is affected by several stresses and it is hard to get the performance degraded information in the limited test time of the accelerated degradation test, this paper presented a method of optimal design for the double-step-down-stress accelerating degradation test （DSDS-ADT） on condition of small sample. The procedure of the test was simulated with Monte-Carlo in the condition that the sample size was specified. Number of stress and inspection frequency were considered as variables and the asymptotic variance estimation of 100pth percentile of the lifetime distribution of the product at use condition was considered as the goal function under the constraint of the total experiments cost. The optimal designed model of the radar board laver double-step-down-stress accelerated degradation test （DSDS-ADT） was established. Simulation results verify the feasibility and validity of this method.