MOTOROLA MVME162-432 68040 CPU, 25MHZ, 8MB DRAM MEMORY,128KB SRAM, 1MB FLASH MEM 由傳動系統測量到的信號具有較強的隨機性，可利用信號來建立參數模型并加以研究即：認為被測信號7（0是由自噪聲zu）激勵某定系統所產生的，只要自噪聲的功率及模型的參數已知，那么測量信號的研究就轉為模型參數和性質的研究，傳動系統的故障診斷就是使其機械結構同從機械本身測量到的信號成分發生聯系來達到的在參數模型中，
信號是由本身的若干次過去值和激勵的現在值及若干次過去值；的線性組合產生回歸（AR）模型的組合，取知=，=回歸系數。參數模型本身就是種變換，它將觀測到的數據轉化為外維向量（ai，a2，…，Z.），其中回歸系數（ai，<，…）充分反映了系統（被研究象）的這特點進行的。
數學模型應于系統某特定特性的模型參數ak來達到。設有m個參數模式Rt（k= ，2，…，m），模式的識別就是以系統現在的狀態模式與模式進行比較，從而定其屬于哪種模式以通過所采集的信號數據立得到iblishingHouse.Allrights當m=0時0時，由噪聲與信號的不相關性，得到，這模式可以是系統的正常運行模式，也可以是故障模式。模式的建立可間的點）應當屬于m個模的哪個，只要求出待判別的系統模式與m個模式間的距離，取其小者即可定待判別的系統模式的歸屬。
可用不同的方法來衡量ak與參數模式Rk之間的距離，主要的有歐氏距離法、加權距離法、分散度法等。
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