为了解决某型加速度计进行可靠性寿命试验最小试验样本量难以确定的难题, 基于可靠性统计推断理论和机电产品寿命分布特点,提出一种结合原始数据修正、分布模型建立和抽样方法设计的适合于工程应用的最小样本量抽样方法。通过该方法得到了该型加速度计进行可靠性寿命试验的样本量为11, 并进行了试验验证。结果表明, 该抽样方法计算得到的先验参数值与原值之间的相对误差不超过1.5%, 可以满足工程应用。

In order to solve the problem that it is difficult to determine the minimum sample size for the reliability life test of an accelerometer, based on the reliability statistical inference theory and the life distribution characteristics of mechanical and electrical products, a minimum sample size sampling method suitable for engineering application is proposed, which combines the original data modification, distribution model establishment with sampling method design.It is obtained through this method that the sample size of the accelerometer for reliability life test is 11, which is experimentally verified.The results show that the relative error between the prior parameter value calculated by the sampling method and the original value is less than 1.5%, which can meet the engineering application.