摘要
提出了一种新型空间柔性并联精密平台,该平台采用压电陶瓷驱动方式,通过单自由度柔性铰链的弹性变形实现末端执行件3个方向的运动;采用柔度矩阵变换法,建立了该柔性精密平台的刚度模型,并用有限元方法对刚度模型进行了验证。在此基础上,讨论了柔性铰链结构参数对平台刚度的影响规律;采用拉格朗日法建立该平台的动力学方程,利用有限元对其进行了模态分析,讨论了3组不同柔性转动副结构参数对微动机构自然频率的影响。
A novel type of space flexible parallel precision platform driven by PZT was designed, and flexure hinge with circular notches and one rotational degree of freedom was utilized to realize the passive adjustment of the three translation movement of the platform. Stiffness model of the stage was established by computing method for flexibility matrix, validated by finite element method. Then, the influence of geometrical parameters on the stiffness of the stage were discussed analytical- ly. Dynamics equation of the stage was established by Lagrange equation, the model analysis of the stage was carried out by means of ANSYS, then, the influence of geometrical parameters of R flexure hinge on the natural frequencies of the stage were discussed analytically.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2013年第17期2317-2323,共7页
China Mechanical Engineering
基金
河北省自然科学基金资助项目(E2013203293)
河北省高等学校科学技术研究重点项目(ZH2011236)
