关键词: 故障特征属性, 加速应力, 模糊关系矩阵, 模糊综合评判

Abstract:

Based on the definition of failure characteristic attribute, the attribute collection was used to represent the failure. The fuzzy relation between system failures and failure stresses could be established according to the fuzzy theory. On the basis of the expert knowledge, the fuzzy relation matrix could be calculated by binary sorting. The failure attribute weight and system failure weight could be calculated by using the fuzzy consistent matrix. According to the fuzzy transformation theory, the fuzzy comprehensive evaluation of the failure stress alternative set could be achieved, and the problem of the selection of the accelerated stresses in a accelerated reliability growth test could be solved. With the analysis of how the end-toothed disc dividing type NC rotary works, this paper gained the results of the fuzzy comprehensive evaluation of the system failure stress and picked up the best accelerated stress combination. In addition, this paper also testified the availability of this method by comparing with the traditional methods.

Key words: failure characteristic attribute, accelerated stress, fuzzy relation matrix, fuzzy comprehensive evaluation