基于虚拟样机技术的自由点接触式凸轮机构仿真研究  

Simulation Studies of Free Point-contacting Cam Mechanism Based on Virtual Prototype Technology

作　　者：杨光[1] 李雪伍[1] 李辉鹏[1] 

机构地区：[1]武汉理工大学机电工程学院,武汉430070

出　　处：《武汉理工大学学报》2014年第5期135-138,共4页Journal of Wuhan University of Technology

基　　金：国家重大科技专项(2011ZX4002-021)

摘　　要：自由点接触式凸轮机构可以实现任意给定运动规律的往复运动,合理建立参数化机械系统动力学模型关系到凸轮机构运动规律的精确性。常用的Point-Curve和Curve-Curve凸轮副约束不能解决自由点接触式凸轮机构的约束问题,给机构合理的建立参数化模型带来困难。基于虚拟样机技术提出运用Contact建立摆杆、凸轮之间的约束来创建动力学模型可以解决自由点接触的约束问题。此外还通过加速度变化曲线推出摆杆的柔性冲击规律以及通过Plot tracking追踪得出模型运动的边界条件,求出摆杆运动方程从而对系统结构性能以及优化设计作出评价。The point-contacting cam mechanism can realize any given reciprocating motion.Establishing a reasonable parametric mechanical system is related to the accuracy of the law of motion system for the cam mechanism.The commonly used cam pair constraint such as the point to curve and curve to curve constraint can not settle constraint problems of the point-contacting cam mechanism with oscillating follower which will bring difficulties to the reasonable parametric mechanical modeling.Using contact constraint between the cam and the oscillating follower can create mechanism modeling and settle constraint problems based on the virtual prototype technology.The article also innovatively launched the law of soft impulse through the acceleration curve.By plot tracking model we can track the movement of the boundary conditions,which can be used to get the equations of motion system and optimize the performance of the system.

关 键 词：凸轮机构 虚拟样机技术 约束 柔性冲击 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]