关于序进应力加速寿命试验中若干问题的探讨

采用若干基本假定,用分段函数连续化方法,给出了在恒定应力条件下寿命服从指数分布或威氏分布的产品,在序进应力加速寿命试验中的寿命分布;并给出了在加速寿命方程满足逆幂律且等速加载情况下的具体分布形式.文中还利用序进应力试验中所获得的数据,应用极大似然估计法估计加速寿命方程与寿命分布中的参数,并对参数估计值的性质进行了讨论.

Some Aspects of Accelerated Life Testing by Progressive Stress

This paper uses some basic assumptions to derive the life distribu-tion of product under accelerated life testing by progressive stress,when thelife distribution under design constant stress follows an exponential or a Wei-bull distribution.It discusses the special case when the acceleration equationsatisfies the inverse power law and progressive stress is directly proportionalto time.The estimators of maximum likelihood(ML)methods are derivedand their properties are discussed.