摘要
对大行程、多自由度及高刚性微纳传动平台的设计要求和特性进行了研究,开发了由压电陶瓷驱动的大行程5-DOF微纳传动平台,设计了位移量大、可导向的微位移放大机构,实现了微纳传动平台的高精度、大移动及大摆动等功能。分析了微纳传动平台的基本原理和自由度,建立了微纳传动平台的运动学模型,得到了其输入/输出特性。基于伪刚体的基本理论及虚功原理,推导了微纳传动平台沿X、Y、Z向的移动刚度及绕X、Y轴的摆动刚度,并对影响微纳传动平台静态刚度的特征参数进行了分析,获得了其移动刚度及摆动刚度的特性。创建了微纳传动平台的几何模型,应用有限元方法对该平台进行了分析及仿真,验证了微纳传动平台的运动学模型、伪刚体模型的正确性。
A five-degree-of-freedom（5-DOF）nano-transmission platform driven by PZT was developed.The platform utilized micro-displacement magnifying mechanisms to realize great mobile,great rotation,high-precision movement transmission.The basic principles and the DOFs of the nano-transmission platform were analyzed.The kinematic model of the nano-transmission platform was established.The Input/Output characteristics of the nano-transmission platform were obtained.Based on the pseudo-rigid-body（PRB）model and virtual work principle,the translational stiffness along xyz direction and rotational stiffness along xand y direction were derived.The relationships between the parameters of leaf spring and the static stiffness of the nano-transmission platform were analyzed.The characteristics of the translational stiffness and rotational stiffness were obtained.A geometrical model of the nano-transmission platform was established.Simulation results of the nano-transmission platform,in terms of finite element analysis（FEA）,show the accuracy of kinematic model and pseudo-rigid-body model.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2010年第22期2679-2684,共6页
China Mechanical Engineering
基金
重庆大学机械传动国家重点实验室研究项目(0301002109150)
重庆大学机械传动国家重点实验室09年度开放基金资助项目
关键词
柔性板簧
微纳传动平台
压电陶瓷
刚度
有限元分析
leaf spring
nano-transmission platform
PZT
stiffness
finite element analysis（FEA）
