基于B样条转速函数的凸轮机构运动优化  

Motion optimization of cam mechanisms based on B-spline speed function

作　　者：肖海文[1] 葛荣雨[2] 王进 陈英雷 孙凯 

机构地区：[1]山东劳动职业技术学院信息工程系,山东济南250022 [2]济南大学机械工程学院,山东济南250021

出　　处：《机械设计》2018年第2期72-76,共5页Journal of Machine Design

基　　金：山东省高等学校优秀青年教师国内访问学者资助项目;山东省重点研发计划资助项目(2015GGX103005)

摘　　要：改变凸轮转速函数,而不改变凸轮轮廓,可以调整出合适的凸轮机构输出特性。B样条曲线作为通用的数学描述形式,具有灵活的调整性。文中首先推导出变速凸轮机构的传递函数,提出以非均匀B样条曲线作为凸轮转速函数,讨论了节点矢量的确定方法。构建了凸轮机构的运动优化模型,并确定了约束条件。最后,通过两个优化实例证明了该方法的有效性。The motion characteristics of the cam mechanisms can be adjusted flexibly by varying the input speed of cam,and not changing the cam profile. The B-spline curve, as the uniform mathematics expression, can be differently shaped depending on its control points. The transfer function of variable-speed cam mechanisms is inferred firstly. Then speed function is described as a non-uniform B-spline curve, and the method to confirm the knot vector is discussed. Then the motion optimization of variable-speed cam mechanisms and its constraints are developed. Finally, two examples are given to illustrate the proposed method and also to show its feasibility and validity.

关 键 词：变速 凸轮机构 非均匀B样条 运动优化 

分 类 号：TH132.47[机械工程—机械制造及自动化]