杠杆
机制(生物学)
流离失所(心理学)
控制理论(社会学)
运动学
铰链
计算机科学
刚度矩阵
刚度
灵敏度(控制系统)
顺应机制
执行机构
约束(计算机辅助设计)
有限元法
结构工程
工程类
机械工程
物理
电子工程
心理学
控制(管理)
经典力学
人工智能
心理治疗师
量子力学
作者
Beibei Hou,Yanchao Tong,Pengbo Liu,Shuaishuai Lu,Guangchun Xiao,Peng Yan
标识
DOI:10.1177/09544062241242666
摘要
The displacement amplification mechanism is commonly utilized in micro/nano-manipulating systems to enhance the output stroke of piezoelectric actuators. Aiming at large amplification ratio, this paper proposes a symmetrical dual-stage amplification mechanism consisting of a differential lever mechanism and a half-bridge mechanism. With consideration of the coupling effect between the dual-stage amplification mechanism, a kinematic modeling method is developed for the symmetrical differential lever-bridge hybrid (SDLBH) mechanism on top of the static balance and constraint conditions of the branch chain. In particular, the force-deformation relationship of the flexible hinge is derived according to the flexibility matrix method. Based on the path constraint conditions of the branch chain, the static equilibrium equation as well as the displacement constraint conditions are obtained. Consequently, the input-output model of the SDLBH mechanism is established, which is capable of accurately predicting the amplification ratio and the mechanical stiffness. Finite element simulations and real time experiments on the SDLBH prototype effectively validate the mechanical performance as well as the accuracy of proposed modeling method. The performance sensitivity of the developed SDLBH mechanism is further analyzed by the Taguchi method, aiming to offer the optimization guideline for real applications.
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