Study on the Stiffness of Positioning Platform with Large Trip and High Precision under Thermal to Structure Coupling

Wei Wei Yang; Ji Zhu Liu; Ming Qiang Pan; Tao Chen; Li Guo Chen; Lin Sen Chen; Li Ning Sun

doi:10.4028/www.scientific.net/AMM.565.164

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 565Study on the Stiffness of Positioning Platform...

Study on the Stiffness of Positioning Platform with Large Trip and High Precision under Thermal to Structure Coupling

Abstract:

Thermal influences the stiffness, and then affects dynamic characteristics of the platform. The paper appoints a method to calculate the global stiffness of the positioning platform with large trip and high precision, and find the rule that the platform stiffness changing with the temperature to follow. The rule provides a fundamental basis for establishing vibration model of the platform. The main method to collect analysis data is finite element. Firstly, choose a number of points from the surfaces of the platform. Through the experiment data of thermal stress coupling analysis on the platform and a degree of grey incidence, the degree of correlation between all concerned points and thermal displacement can be solved. The key points are confirmed the one which have large degree of grey incidence which also have large influence on the stiffness, and will be the input value of stiffness model of the platform. Calculate the global stiffness value of positioning platform under different temperature using the finite element method analysis. Establish the stiffness model using BP neural network.

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Periodical:

Applied Mechanics and Materials (Volume 565)

Pages:

164-169

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.565.164

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Online since:

June 2014

Authors:

Wei Wei Yang, Ji Zhu Liu, Ming Qiang Pan, Tao Chen, Li Guo Chen, Lin Sen Chen, Li Ning Sun

Keywords:

Coupling Stiffness, Finite Element, Grey System, High Precision Positioning Platform

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