Gas film performance of double-row orifices of aerostatic guideways  

作　　者：陈东菊 范晋伟 张飞虎 

机构地区：[1]College of Mechanical Engineering & Applied Electronics Technology,Beijing University of Technology [2]Dept. of Mechanical Engineering,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2012年第1期50-54,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China (Grant No.90923023,51105005)

摘　　要：In order to analyze the performance of aerostatic guidways,the stiffness calculation equation of the aerostatic guideway with two-row orifice has been derived by gas lubrication theory. For the complex structure of the motion guideway and unloading guideway,the frequency of the whole slides in machining direction with gas thickness has been derived. Wavelet transform as a means to process the measured signal of workpiece surface, the frequency characteristics of gas fluctuation of aerostatic guideways has been extracted out from the measured signal,and the errors of the guideway system have been identified according to the power spectral density (PSD) ,and this provide a basis for the identification of machine tool error.In order to analyze the performance of aerostatic guidways, the stiffness calculation equation of the aerostatic guideway with two-row orifice has been derived by gas lubrication theory. For the complex structure of the motion guideway and unloading guideway, the frequency of the whole slides in machining direction with gas thickness has been derived. Wavelet transform as a means to process the measured signal of workpiece surface, the frequency characteristics of gas fluctuation of aerostatic guideways has been extracted out from the measured signal, and the errors of the guideway system have been identified according to the power spectral density （PSD）, and this provide a basis for the identification of machine tool error.

关 键 词：aerostatic guidways gas fluctuations wavelet transform PSD error identification 

分 类 号：TH161[机械工程—机械制造及自动化]