基于非对称质量损失模型的函数机构稳健设计  

Robust Synthesis of Function Mechanisms by Using Asymmetric Quality Loss Models

作　　者：杨昌明[1] 段胜秋 

机构地区：[1]西华大学机械工程学院,四川成都610039

出　　处：《西华大学学报（自然科学版）》2016年第2期30-33,共4页Journal of Xihua University:Natural Science Edition

基　　金：教育部重点实验室资助项目流体及动力机械(SBZDPY-11-22)

摘　　要：为解决产品的质量特性偏离理想值所带来的非对称质量损失问题,提出一种非对称质量损失模型。应用截尾正态分布理论,推导出非对称质量损失的均值计算公式,以曲柄滑块机构为例,建立对称与非对称2种稳健优化模型。与对称质量损失函数相比,基于非对称质量损失函数的优化结果能够有效避开质量损失大的方向,从而有效减小质量损失。蒙特卡洛仿真实验验证了该方法的有效性。In order to account for asymmetric quality loss problems resulted from quality characteristics deviation to targets,we propose asymmetric loss models. Firstly,truncated normal distribution theory is applied to computing the expected value for asymmetric loss functions. Symmetric and asymmetric optimization models are then built for robust synthesis of a slider-crank mechanism. Compared with symmetric quality loss model,asymmetric quality loss model has the advantage to shift away from big quality loss and reduce quality loss. Finally,the Monte Carlo simulation solutions show that the proposed approach is effective in robust design for problems with asymmetric quality losses.

关 键 词：稳健设计 非对称质量损失函数 曲柄滑块机构 蒙特卡洛法 

分 类 号：TH112[机械工程—机械设计及理论]