Integral estimation method of constant stress accelerated test data under periodic inspection

Constant stress accelerated life test is one of the best effective methods which can verify the reliability of products with high reliability and long lifetime index, and how to evaluate the reliability of products exactly with the accelerated test data under periodic inspection is concerned especially in the engineering. An integral estimation method for the grouped data of the constant stress accelerated life test is presented in this paper, the method can make the grouped data from different stress levels an integral for statistical analysis, and it can reach higher precision than the traditional method.