基于Lempel-Ziv指标的主轴系统退化
The Research for the Degradation of the Spindle of Machine Tool Based on Lempel-Ziv Index

为了检测机床主轴系统在使用过程中状态的变化，提出了一种基于复杂度指标的劣化分析方法。以某磨床空转运行时工件主轴系统产生的振动信号为分析对象，采用复杂度指标对磨床在数月使用过程中工件主轴的状态进行判断。分析结果表明，随着使用时间的增加，工件主轴系统产生的振动信号的复杂度增加。为了验证复杂度指标在劣化分析中的有效性，采用复杂度指标对美国凯斯西储大学公布的劣化轴承数据进行分析，结果表明，该方法在劣化分析中是可行的。
In order to estimate the states of the machine tool spindle system during the course of its operation, this paper proposes a deterioration method based on the complexity of the nonlinear system by monitoring the relative index. The vibration signals generated by the workpiece spindle when the grinder machine tool operation is idling were used as the objects of analysis, and the complexity relevant index is used to judge the states of the workpiece spindle of the grinding machine during several months of operation. The analysis results showed that the complexity of the vibration signals generated by the workpiece spindle system increased as the time in use increased. In order to verify the validity of the deterioration analysis, the complexity index is used to analyze the dates of the deterioration bearing published by CWRU. The results showed that the complexity is an effective method for deterioration analysis.