应用模糊数学中的模糊综合评判理论，提出一种确定系统主要失效零件的新方法，即失效严重度模糊综合评判。该方法克服了以往的主要失效零件确定方法的不足，它能够考虑有关失效的各种因素、因素权重和因素对各等级的隶属度，并引入等级加权向量，使计算结果能全面准确地反映失效的严重程度。 Applying the fuzzy comprehensive evaluation theory in fuzzy mathematics, a new method to determine the main failure parts of the system is proposed, namely the fuzzy comprehensive evaluation of failure severity. The method overcomes the shortcomings of the previous methods of determining the main failure components. It can take into account the various factors related to failure, the weight of the factors and the membership degree of the factors to each level, and introduces the rank-weight vector so that the calculation results can fully and accurately reflect the failure The severity of