摘要
本文对AR模型的差比定阶方法进行了修正;并从工程应用角度,在机械故障诊断的领域里,提出分低阶AR模型和高阶AR模型的观点以及根据FFT-AR谱相似系数取最大值的定阶方法。
The method of determining order of AR model by DIFFERENCE-RATIOhas been modified in this paper.The views of AR model divided into higherorder and lower order as well as the method of taking the maximun similarityfactor of FFT-AR spectrum have been presented for engineering applicationsin the field of the machine fault diagnosis.
关键词
时间序列
AR模型
差比定阶准则
time series
AR model
the criterion of determining order by DIFFE-RFNCE-RATIO
