本論文主旨為滾動軸承之故障診斷，因軸承的振動會與結構共振產生振幅調制現象，頻率能量將被載至高頻區間，由傳統頻譜分析無法辨識其振動特徵，故發展包絡譜分析方法作為軸承缺陷檢測工具，文中導入頻譜分析及時頻分析的觀念，以變轉速掃頻的方式獲得結構共振頻率範圍，準確地選擇帶通濾波器範圍，排除與軸承元件無關的頻率；在一般工程訊號皆為實數訊號的情況下，計算原實數訊號之希爾伯轉換可得複數解析訊號，並可求得原實數訊號之包絡線，達到振幅解調的效果。研究中以軸承幾何尺寸計算缺陷振動之特徵頻率，且先後利用數值模擬以及工程應用實例來驗證包絡譜分析實用性，針對兩測試平台使用的滾珠軸承分別製作內、外環軌道缺陷(以EDM加工方式製作缺陷)，由加速規量測之振動信號進行監測，並討論加速規量測位置對於分析的影響。

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