Abstract: In this paper, according to characteristics of goers transmission and side-band of modulation, it provide a new method that AR model is established on the qunfrency domain, model parameter is value of characteristic and it applies distance of EUCLIDE to recognize gents transmission condition. At last, the paper takes the classification of car guars condition as an example to expound effectiveness of the method.

Key words: 倒谱分析, 调制边带, 分类器, 啮合振动