摘要
双谱分析作为非线性系统辨识的有效方法,已引起人们极大的兴趣.在极小化均方误差的准则下,利用最优的二维谱窗对周期图进行加窗处理可构造出双谱的一致估计.本文将在此基础上获得的双谱估计快速算法应用于机械故障诊断之中,对Mx—4车床的颤振现象进行了辨识,取得了明显的效果,并与未经加窗处理的双谱进行了比较.
As an efficient method in identification of non-linear system,bispectral analysis hascaused people great interests. According to the criterion of minimizing the mean-square cr ror. using the optimal two-dimensional spectral window to deal with periodogram. we can construct a consistent estimation of bispectra. In this paper.based on the above idea.we have gained the fast alogrithm of bispectral estimation and have applied it to machine fault diagno. sis. Furthermore we have investigated on the chatter phenomenon in a type Mx- 4 lathe and lead to explicit effect. In the end .comparisons are made between the bispectra with and with out windows.
出处
《振动．测试与诊断》
EI
CSCD
1993年第2期1-6,56,共7页
Journal of Vibration,Measurement & Diagnosis
关键词
故障诊断
双谱分析
颤振
车床
机械
Fault diagnosis . bispectral analysis , chatter phenomenon , system identification. two-dimensional spectral window
