基于AR双谱分析的电梯运行质量研究

Research on Elevator Running Quality Based on AR Bispectrum Analysis

文中通过采集电梯运行过程中轿厢的加速度振动信号,建立时间序列的自回归功率谱和双谱模型。结果表明,通过双谱幅值的分析、自相关功率谱与重构功率谱的比较,可以获得信号的非高斯、非线性频率特性信息,对分析电梯运行质量具有重要的指导意义。

In this paper, through the acquisition of acceleration vibration signals in the process of elevator running, we can build power spectrum mode and double spectrum mode, both of them are based on time series. The research shows we can obtain the non-Gaussian and non-linear information of the signal through analyzing the bispectrum amplitude and the comparison of the autocorrelation power spectrum and reconstruction power spectrum, which is very important for us to analyze the operation quality of elevator.