Firstly the electric - drive equipment ' s electrical system is changed into data circuit . then the testing code is gained by the boolean difference method . finally the number of the sampling is reduced 通過將電傳動電路轉化為數字電路,并利用數字電路故障診斷方法進行處理,大大地減少了教學系統的采樣點數目,為在線故障定位系統的研制做了理論上的準備。