ANALYSIS AND OPTIMAL DESIGN THE EFFECT OF DESIGN VARIABLES ON MAGANIFICATION RATIO OF A MAGANIFICATION MACHANISM EMPLOYING FLEXIBLE HINGE

Abstract

In order to high work performant for compliant mechanism about motion scope, work long term and high frequency. Therefore, in this investigation displacement, maximum principal stress and the first modal shape frequency were analyzed by Finite element analysis (FEA) for a magnification mechanism to find out effects of design variables on magnification ratio of this mechanism. The FEA outcomes indicated that design variables have significantly affected on magnification ratio, maximum principal stress and the first modal shape frequency of a magnification mechanism. The magnification ratio obtained 42.83 times thereby maximum principal stress is equal to 132.79 MPa and the first modal shape frequency is equal to 377.44 Hz, respectively. The forecast results by the Taguchi method achieve a displacement of 0.4392 mm, and according to this method the optimal structure has a displacement of 0.4451 mm with the dimensions of the following variables: variable A is 0 mm, variable B is 23 mm and C is 60 mm, the parameters combine at the levels A1B2C1. This structure amplified 44.51 times, this result is a good agreement compared with the forecast results, the error compared to the forecast is 1.33%.the forecast results, the error compared to the forecast is 1.33%.