Abstract: To evaluate the comprehensive performance of globoidal cam reduction mechanism,an evaluation model based on entropy weight extension theory was proposed.Based on the extension theory,eight innovative schemes of point and line engagement globoidal cam deceleration mechanism were designed.Ten evaluation indexes were extracted from four aspects of structural design,manufacturing,dynamic characteristics and static characteristics to establish the comprehensive performance evaluation system of globoidal cam deceleration mechanism.The comprehensive performance evaluation model was established based on the entropy weight extension theory,and the qualitative and quantitative index data were integrated.The index weight combination was assigned by Analytic Hierarchy Process (AHP)-entropy weight method,and the comprehensive evaluation results were obtained by extension evaluation method.Considering both subjective and objective evaluation,the comprehensive performance of the linear and point-mesh globoidal cam reducer was evaluated and analyzed,and the comprehensive performance of the globoidal cam reduction mechanisms was sorted and optimized under the same general design parameters,the same motion conditions and the same load,which provided theoretical support for the subsequent application of the globoidal cam deceleration mechanisms.

Key words: globoidal cam, comprehensive performance evaluation model, entropy weight extension theory, analytic hierarchy process, entropy weight method

摘要： 为评价弧面凸轮减速机构的综合性能,提出了基于熵权可拓理论的弧面凸轮减速机构综合性能评价模型。基于可拓理论设计出点、线啮合两种类型8种弧面凸轮减速机构创新方案,从结构设计、加工制造、动态特性和静态特性4个方面提取了10个评价指标建立弧面凸轮减速机构综合性能评价体系,基于熵权可拓理论建立综合性能评价模型,融合定性指标和定量指标数据,并通过层次分析法(AHP)熵权法进行指标权重组合赋值,采用可拓评价方法得出综合评价结果。该评价方法同时考虑主观性和客观性评价,对线啮合型和点啮合型两种啮合类型的弧面凸轮减速机构进行综合性能评价分析,在通用设计参数相同、运动条件相同和负载相同条件下对弧面凸轮减速机构综合性能进行排序选优,为后续弧面凸轮减速机构应用提供理论支持。

关键词: 弧面凸轮, 综合性能评价模型, 熵权可拓理论, 层次分析法, 熵权法