利用多尺度熵值診斷油冷效應下中空滾珠導螺桿之運動特性

Using Multi-Scale Entropy for Diagnosis the Motion Features of a Hollow Ball Screw with Oil Cooling

孫士倫(Shi-Lun Sun) ； 黃宜正(Yi-Cheng Huang)

《應用聲學與振動學刊》 5卷2期 (2013/12) Pp. 1-15

https://doi.org/10.6282/JASV.2013.12.01

摘要

本研究目的在於分析滾珠導螺桿於油冷條件下判斷其健康狀況與定位精度。先藉由熱影像儀觀察螺桿溫升分佈與趨勢，再運用馬達扭矩的電流訊號，藉由希爾伯特轉換法、經驗模態分解（EMD）與多尺度熵值（MSE）的分析判斷，了解在建立與關閉油冷系統情況之下，正常螺帽預壓條件下之滾珠導螺桿特性，比對光學尺迴授訊號特徵與命令位置求出定位誤差，獲取更高的定位精度的操作參數。

關鍵字

滾珠導螺桿 ； 油冷系統 ； 希爾伯特黃轉換法 ； 多尺度熵值

並列摘要

This study aims to analyze the motion feature of a hollow ball screw with oil cooling system. First we observed the screw temperature rise distribution and the trends by thermo experimentation. Second, the driving current signals were analyzed through the Hilbert- Huang Transform (HHT) and the Multiscale Entropy (MSE). Some ball screws characteristics with the aid of oil cooling system were acquisitioned and diagnosed. Finally, the position accuracy was compared through the linear scale feedback signals with the consideration of the oil cooling system. Some operation parameters for stage motion are acquired for bettering positioning.

並列關鍵字

Hollow Ball Screw ； Oil Cooling System ； Hilbert-Huang Transform (HHT) ； Multiscale Entropy (MSE)