Research and Improvement of Flexible Micro-positioning Platform with a Three-dimensional Bridge-type Amplification Mechanism
Zhao Zhiquan
Zhu Xijing
Li Jing
Cui Jiajun
Abstract：In the design of the micro-positioning platform,a three-dimensional bridge-type amplification mechanism capable of generating high displacement amplification ratio was introduced.On this basis,a four-bar symmetric guiding mechanism was incorporated to effectively reduce the parasitic displacement at the output end.This design allows the micro-positioning platform to fully leverage the advantages of both mechanisms.By applying the strain energy theory,the second theorem of Castigliano,and Lagrange's theorem,the static and dy-namic mathematical models of the micro-positioning platform were established.The theoretical analysis re-vealed the influence of key dimensions on the displacement amplification ratio of the platform.Through calcula-tion,the amplification ratio and natural frequency were determined to be 19.90 and 193.26 Hz respectively,un-der the optimal parameters.Finite element analysis was used to verify the amplification ratio and natural fre-quency,resulting in relative errors of 4.3％and 5.9％respectively.This confirms the superior performance of the improved micro-positioning platform proposed in this study,as well as the accuracy of the theoretical analysis method.It provides theoretical guidance for the mathematical modeling of flexible micro-positioning platforms with amplification mechanisms.
Keywords：Three-dimensional bridge-type amplification mechanismFour-bar symmetrical flexible mechanismFlexible micro-positioning platformCastigliano's second theoremFinite element simulation
Publication Date：2024-09-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 152-159 )