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鉴于各类制造因素在表述方式、度量方法及其与成本的关系等方面均存在一定的模糊性和可变性,基于直觉模糊集理论和稳健设计原理,提出了直觉模糊制造知识驱动的公差稳健设计方法.首先,从工艺装备价值、零件可加工性、加工工艺属性、产品属性、人员技术水平等5个方面建立直觉模糊制造知识集,研究了知识元素构成和元素水平划分;然后,建立了包含目标层、准则层和知识层的制造成本评估指标体系,采用多级直觉模糊综合评判法计算制造成本因子,与传统模糊综合评判相比,更符合真实评判逻辑;最后,结合成本-公差模型和装配模糊质量损失函数,建立了公差的模糊稳健优化模型.该方法符合面向制造的设计理念,综合考虑了各类制造知识对公差设计的影响,航空油箱装配的实例分析表明了该方法可行,且具有好的灵活性和鲁棒性等优点.
In view of the fuzziness and variability of all kinds of manufacturing factors in the aspects of expression method, measurement method and its relation with cost, based on intuitionistic fuzzy set theory and robust design principle, the intuitionistic fuzzy manufacturing knowledge-driven tolerance robust design Method.Firstly, the intuitionistic fuzzy manufacturing knowledge set is established from five aspects of the value of process equipment, the processability of parts, the properties of process technology, the product attributes and the technical level of personnel, and the composition of knowledge elements and the division of elements are studied. Then, Target cost, target cost, standard value and knowledge cost. The multi-level intuitionistic fuzzy comprehensive evaluation method is used to calculate the manufacturing cost factor, which is more in line with the true judgment logic than the traditional fuzzy comprehensive evaluation. Finally, combining the cost-tolerance model And assembly fuzzy quality loss function, a fuzzy and robust optimization model of tolerance is established.The method accords with the manufacturing-oriented design concept, considering the influence of various manufacturing knowledge on the tolerance design, the example analysis of aviation fuel tank assembly shows that the method is feasible, And has good flexibility and robustness and other advantages.