Development of a New Precision Actuator by Bi-morph Type PZT to Realize Nano/Micro Mechanical Testing in MUTM

바이몰프형 PZT를 이용한 소형만능재료시험기용 정밀 구동 액추에이터의 개발

  • 권현규 (금오공과대학교 기계공학부) ;
  • 최성대 (금오공과대학교 기계공학부) ;
  • 정선환 (금오공과대학교 기계공학부)
  • Published : 2006.03.31

Abstract

This paper shows a new precision actuator of MUTM(miniature universal testing machine) for the testing of compression and tensile load on the MEMS materials and structures. The MUTM consists of a sample holder, an ultraprecision precision actuator(tranlation stage) and load sensor. The precision actuator has been developed for generating displacements with nanometer accuracy and a dynamic range of 1mm simultaneously. In this paper, it can be made by using the displacement property of bi-morph type PZT, which is able to extend the long range(stroke) according to cantilever size. However, it is not enough to be generated for compression and tensile load in miniature universal testing machine. Therefore, three dozen bi-morph type PZTs are used for generating the load. The load and displacement of the precision actuator are 35g and 0.4mm respectively.

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