Design and analysis of precision clutches based on piezoelectric ceramics
XIA Yangqiu
ZHONG Kunlin
CHEN Long
XU Yaoyu
Abstract：[Objective]In order to realize the high-precision clutching of a dual-axis nested ultra-precision angular measuring turntable,a design and analysis method of an automatic precision clutch was proposed based on the piezoelectric ceramic stack drive.[Methods]Firstly,based on the working principle and design specifications analysis of the dual axis turntable,combined with the characteristics and advantages of piezoelectric ceramics,an active separation radial piezoelectric clutch was designed,and its working principle and key technical parameter calculation methods were elaborated in detail.Secondly,through the establishment of geometric and mechanical models of an elliptical displacement amplification mechanism,the optimal matching displacement and stiffness of the clutch's displacement amplification mechanism were obtained.Finally,the simulation analysis were conducted on the fatigue strength of the clutch based on the finite element analysis,and the performance of the clutch was verified by the tests.[Results]The simulation results show that under 106 load cycles,the minimum safety factor of the clutch is about 2.7,indicating its good strength performance.The test results indicate that the clutch only has an impact on the angle measurement of the turntable at the moment of separation and coupling,and this impact can be accepted by the servo.This research provides an innovative and effective solution for the design of precision mechanical transmission systems and offers new insights and methods for the study of similar clutches.
Keywords：ClutchPiezoelectric ceramicAutomatic clutchDisplacement amplificationStrength analysis
Publication Date：2026-04-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 49-55 )