不完全概率信息牛头刨床机构运动精度可靠性稳健设计  

Reliability-based Robust Design for Kinematic Accuracy of the Shaper Mechanism under Incomplete Probability Information

作　　者：张义民[1] 黄贤振[1] 贺向东[2] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004 [2]大连工业大学机械工程与自动化学院,大连116034

出　　处：《机械工程学报》2009年第4期105-110,共6页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划(863计划,2007AA04Z442);国家自然科学基金(50875039);高等学校创新团队资助项目。

摘　　要：将可靠性优化设计理论、可靠性灵敏度技术与稳健设计方法相结合,讨论不完全概率信息牛头刨床主运动机构运动精度可靠性稳健设计问题。从平面机构的几何约束方程出发,推导机构运动精度误差表达式,建立牛头刨床机构运动精度失效的极限状态方程,提出牛头刨床机构运动精度可靠性稳健设计模型。在已知基本随机参数前四阶矩的情况下,通过计算机程序可以实现牛头刨床机构的运动精度可靠性稳健设计,迅速准确地得到牛头刨床机构的设计信息。The reliability-based robust design for kinematic accuracy of the shaper mechanism under incomplete probability information is extensively discussed by combining the reliability-based optimization design theory, the reliability sensitivity technique and the robust design method. The loop closure equations are used to estimate the kinematic accuracy errors of planar mechanism, and the limit state function for kinematic accuracy failure of the shaper mechanism is developed. The mode of reliability-based robust design of the shaper mechanism is proposed, and under the condition that the first four moments of basic random parameters are available, the computer program based on this model can complete the reliability-based robust design for kinematic accuracy of the shaper mechanism and acquire the design information accurately and quickly.

关 键 词：牛头刨床机构 可靠性优化 稳健设计 不完全概率信息 

分 类 号：TH112.1[机械工程—机械设计及理论]