降低振动和噪声水平,提高乘坐舒适性,是多驱动组合式自动扶梯亟待解决的重要课题。本文通过频谱分析的传统方法 FFT(包括相干分析和倒频谱分析)以及时间序列方法(包括 ARMA 和最大熵谱法),对自动扶梯整体结构及驱动装置的振动信号进行了现场测试、数据处理及故障诊断和分析。指出了振动的主要原因,提出了改进措施,并对两种方法进行了比较. Reduce the vibration and noise levels, improve ride comfort, multi-drive escalator is an important issue to be solved. In this paper, the field test, data processing and analysis of the vibration signal of escalator overall structure and driving device are carried out by the traditional method of spectrum analysis (including coherent analysis and cepstrum analysis) and time series method (including ARMA and maximum entropy spectrum method) Fault diagnosis and analysis. The main reason of vibration is pointed out, the improvement measures are put forward and the two methods are compared.