A Performance Evaluation of Four Bar Mechanism Considering Flexibility of Links and Joints Stiffness
A. M. Vaidya*, P. M. Padole
Identifiers and Pagination:Year: 2010
First Page: 16
Last Page: 28
Publisher Id: TOMEJ-4-16
Article History:Received Date: 31/3/2009
Revision Received Date: 01/9/2009
Acceptance Date: 21/9/2009
Electronic publication date: 21/7/2010
Collection year: 2010
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This paper deals with the study of joint clearance on kinematics of mechanism and bearing stiffness along with links flexibility on modal analysis at higher frequency. Literature survey reveals that the studies were carried out for highspeed mechanism considering linkage flexibility without considering bearing stiffness. The method of calculating clearance at joints, checking for orientation of linkages and estimation of exact mechanical error using sensitivity analysis is discussed. An attempt is also made to analyze the actual dynamic performance of mechanism by determining natural frequencies of flexible mechanism at high speed considering the effect of bearing stiffness. Bearing stiffness depends upon speed, bearing load and also on wear, out of run, play etc during operation. It is observed that as the stiffness of joint increases natural frequency also increases and converges when stiffness reaches a value close to 1.6x109N/m.