The vibration modeling and analysis of Stewart platform-based machine tool

In this paper, the vibration modeling and analysis of Stewart platform-based machine tool is presented. The vibration modeling includes the derivation of the vibration equation and the detailed processes to deal with that. Each of the kinematic chains is considered as a flexible chain and simplified into a spring-damper submodel. Vibration modeling of the machine tool is established by Newton-Euler approach. Then, the natural frequencies of the moving platform are obtained based on the vibration equation by the aid of MATLAB. The vibration characteristics of the machine tool are analyzed and discussed by means of the numerical examples considering the different poses of the moving platform. The conclusion can be drawn that the natural frequencies of the platform are influenced by the poses of the platform. © 2014 Trans Tech Publications, Switzerland.