Prediction of the First Modal Frequency of Compliant Mechanisms Using the Pseudo-Rigid-Body Model

[+] Author and Article Information
S. M. Lyon, P. A. Erickson, M. S. Evans

Mechanical Engineering Department, Brigham Young University, Provo, UT 84602

L. L. Howell

J. Mech. Des 121(2), 309-313 (Jun 01, 1999) (5 pages) doi:10.1115/1.2829459 History: Received November 01, 1997; Revised February 01, 1999; Online December 11, 2007


The pseudo-rigid-body modeling technique is used to simplify the nonlinear analysis of compliant mechanisms. This paper presents the first work that investigates the possibility of using the pseudo-rigid-body model to predict the first modal response of compliant mechanisms. Four different configurations of the parallel-guiding mechanism are modeled and tested, as well as two configurations of compliant straight-line mechanisms. The model predictions of the first natural frequencies were compared with experimental results for all six mechanism configurations. The model predictions are within 9 percent of the experimental results for all cases.

Copyright © 1999 by The American Society of Mechanical Engineers
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