基于传动可供性评价的机械系统方案设计方法

Schematic design of mechanism system based on transmissionaffordance evaluation

针对基于功能的设计方法无法将非功能性作用融入机械系统方案设计阶段的问题,提出传动可供性评价的机械系统方案设计方法.给出传动可供性定义;构建设计需求、传动类型、传动元件、传动可供性的关联关系模型;以设计需求为统一颜色、传动类型为个人颜色、传动件为元素、传动可供性为约束、传动可供性性质为约束统一颜色,建立机械传动系统多色模型.通过设计需求与传动类型、传动类型与传动件围道推理及合取规则,获得传动类型组合方案粗糙集.考虑机械传动件约束统一颜色评估为设计准则,以功能可供性信息量最小、非功能可供性理想度最大为综合评价目标,建立传动元件配置优化多目标0-1线性规划模型.借助跳跃路径二进制位置更新机制和多样性测度维护的布谷鸟算法求解最优传动系统配置方案.以实例验证该方法的有效性.

A novel schematic design method of mechanism transmission system based on transmission affordance evaluation was presented aiming at the problem that the function-based design method cannot integrate nonfunctional impact into the schematic design stage of the mechanical transmission system.Firstly,the definition of transmission affordance was given.An association model was constructed to demonstrate the relationship of design requirement,transmission type,transmission part and transmission affordance.Then,the association model was represented by polychromatic sets theory,through viewing design requirements as uniform color,transmission type as individual color,transmission part as element,transmission affordance as constraint uniform,and feature of transmission affordance as constraint uniform.The transmission type combination schemes’rough set was obtained by two kinds of contour reasoning and conjunctive rules inference based on the association model.One kind of contour reasoning was the reasoning between design requirements and transmission type,and the other was the reasoning between trainsmission type and transmission part.Additionally,a multi-objective zero one linear programming model for optimal configuration of transmission components was developed,considering the uniform color evaluation of mechanical transmission constraints as a design criterion.The purpose of the design criterion was to minimize the functional affordance information,and maximize the non-functional ideal degree.Finally,the optimal transmission system configuration scheme was solved by the improved Cuckoo algorithm that utilizing skip path binary location update mechanism and diversity measure.The effectiveness of the proposed method was verified by an example.