By processing real - time digital analog fault vibration signal and adopting minimum quadric multiplication and rectangle function , correct frequency chart will be gained . thus , the system design based on advanced dsp can be applied to the real - time fault diagnosis of rolling bearing in modern high - speed train 通過對采集的模擬的有故障振動信號進行在線實時數字信號處理,并在信號分析方面采用了最小二乘法及加窗函數,以獲得正確的頻譜,通過信號處理,并進行結果比對,進而可證明此系統在高速列車轉向架滾動軸承在線診斷中應用的可行性。