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材料的合理选择在很大程度上决定了产品的质量和成本,然而材料选择过程涉及因素众多,不仅有定量因素还有定性因素,定量因素又有精确数和不可精确确定的区间数,属性之间又存在不同程度的关联,因此材料选择是一个关联的混合多属性决策问题。首先利用距离的方法把不同属性规范化的方法统一为一个公式,简洁明了。利用λ模糊测度的方法计算属性集的模糊测度,利用Choquet积分集成属性值。最后通过滑动轴承材料选择的实例,阐明了先根据零件的可能失效形式及客户要求确定性能指标,再确定可行解,最后确定最优解的决策步骤。决策结果经实践检验是合理的,进一步说明了该方法的实用性和有效性。
The rational choice of materials largely determines the quality and cost of the product. However, there are many factors in the material selection process, including not only the quantitative factors but also the qualitative factors. The quantitative factors have exact numbers and inaccurately defined intervals. Therefore, material selection is an associated mixed multiple attribute decision making problem. First of all, using the method of distance to normalize the different attributes of the method as a unified, concise. The fuzzy measure of attribute set is calculated by λ fuzzy measure, and the attribute value is integrated by Choquet integral. Finally, through the examples of the material selection of the plain bearing, the decision steps of determining the performance index according to the possible failure modes of the parts and customer requirements, and then determining the feasible solution and finally determining the optimal solution are illustrated. The result of the decision is proved by practice to be reasonable, further illustrating the practicability and effectiveness of the method.