计及尺寸公差和配合的平面连杆机构优化设计  

Optimal design of planar linkage mechanism with tolerances of dimensional and fit

作　　者：王兴东[1] 杨柏[1] 孔建益[1] 张华[1] Wang Xingdong Yang Bo Kong Jianyi Zhang Hua(School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China)

机构地区：[1]武汉科技大学机械自动化学院,湖北武汉430081

出　　处：《华中科技大学学报（自然科学版）》2017年第3期23-28,共6页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51275365);国家高技术研究发展计划资助项目(2014AA041504)

摘　　要：分析了设计与制造过程的关联性,考虑了杆长公差和孔轴配合对系统运动精度的影响,基于蒙特卡罗算法,提出了计及公差和配合的平面连杆机构优化设计方法,预测了制造后机构运动的误差.优化设计了含间隙连杆角位移机构,与经典的模糊稳健优化设计及稳健优化设计相比,误差的均值和标准差变化一致,说明了所提方法的有效性;将其拓展应用于不同配合的间隙模型优化,实现了设计阶段对机构运动误差范围的预测,为机构优化设计提供了一套可量化的评价体系.Abstract The problems of the relationship between design and manufacturing were analyzed. The influence of dimensional tolerance and fit tolerance on the motion accuracy of the system was considered in the design phase. Then based on the Monte Carlo simulation, the planar linkage mechanism optimal design model was set up. A typical four-bar mechanism was used as an illustrative example to carry out the optimal design. Compared with the results of the typical fuzzy robust optimal design and robustness design, it shows that the mean value and the standard deviation have the similar variation characteristics, so the method is effective. The method was furthermore applied in the optimization of the schemes with different fit tolerances, the prediction of motion errors in the design phase was a- chieved, and the set of the quantitative evaluation system for mechanism optimal design was provided.

关 键 词：不确定性 平面连杆机构 蒙特卡罗算法 尺寸公差 配合公差 优化设计 

分 类 号：TH112[机械工程—机械设计及理论] TH122