凸轮机构两质量动力学模型的运动误差及接触力分析

针对凸轮机构线性单质量、单自由度动力学模型的局限性，利用集中参数法提出了一种两质量的动力学模型．以凸轮输出为余弦运动形式为例，分析了两质量动力学模型中从动件的输出位移、输出误差及凸轮与从动件间的接触力，并以一个设计实例进行了求解．结果表明：由两质量模型可以得到机构的运动误差、凸轮与从动件间的接触力及凸轮转速对运动误差和接触力的影响.这些结果对凸轮机构的设计具有一定的指导意义．

Analysis of kinematic error and contact force in cam follower system based on two-mass dynamic model

The limitation of linear single degree of freedom one mass model was analyzed， and two mass dynamic model was built by lumped parameters. The displacement of follower， the output error of the cam follower system and the contact force between the cam and follower were analyzed through assuming the displacement function of the cam was cosine. The results of two mass model were simulated by a design example. The results show that the kinematics error， contact force and relationship between angle velocity of the cam and kinematic error and contact force got by the two mass model are very useful to the actual design of cam mechanism．