MOTOROLA MVME162-432 68040 CPU, 25MHZ, 8MB DRAM MEMORY,128KB SRAM, 1MB FLASH MEM 由傳動(dòng)系統(tǒng)測量到的信號具有較強(qiáng)的隨機(jī)性，可利用信號來建立參數(shù)模型并加以研究即：認(rèn)為被測信號7（0是由自噪聲zu）激勵(lì)某定系統(tǒng)所產(chǎn)生的，只要自噪聲的功率及模型的參數(shù)已知，那么測量信號的研究就轉(zhuǎn)為模型參數(shù)和性質(zhì)的研究，傳動(dòng)系統(tǒng)的故障診斷就是使其機(jī)械結(jié)構(gòu)同從機(jī)械本身測量到的信號成分發(fā)生聯(lián)系來達(dá)到的在參數(shù)模型中，
信號是由本身的若干次過去值和激勵(lì)的現(xiàn)在值及若干次過去值；的線性組合產(chǎn)生回歸（AR）模型的組合，取知=，=回歸系數(shù)。參數(shù)模型本身就是種變換，它將觀測到的數(shù)據(jù)轉(zhuǎn)化為外維向量（ai，a2，…，Z.），其中回歸系數(shù)（ai，<，…）充分反映了系統(tǒng)（被研究象）的這特點(diǎn)進(jìn)行的。
數(shù)學(xué)模型應(yīng)于系統(tǒng)某特定特性的模型參數(shù)ak來達(dá)到。設(shè)有m個(gè)參數(shù)模式Rt（k= ，2，…，m），模式的識(shí)別就是以系統(tǒng)現(xiàn)在的狀態(tài)模式與模式進(jìn)行比較，從而定其屬于哪種模式以通過所采集的信號數(shù)據(jù)立得到iblishingHouse.Allrights當(dāng)m=0時(shí)0時(shí)，由噪聲與信號的不相關(guān)性，得到，這模式可以是系統(tǒng)的正常運(yùn)行模式，也可以是故障模式。模式的建立可間的點(diǎn)）應(yīng)當(dāng)屬于m個(gè)模的哪個(gè)，只要求出待判別的系統(tǒng)模式與m個(gè)模式間的距離，取其小者即可定待判別的系統(tǒng)模式的歸屬。
可用不同的方法來衡量ak與參數(shù)模式Rk之間的距離，主要的有歐氏距離法、加權(quán)距離法、分散度法等。
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