基于变模式分解方法的电梯机房噪声分析实验研究

Analysis of Elevator Machine Room Noise Based on Variable Mode Decomposition Method

本文针对电梯噪声来源识别困难,提出了运用变模式分解方法,找出产生噪声的主要运动部件的方法。在文中实验分析部分,主要针对电梯的旋转运动部件如曳引轮、反绳轮、限速器运动频率的不同,将信号采集卡收集的噪声信号进行变模式分解,把复杂的噪声信号分解为多个单一的噪声分信号,再将分信号进行频域分析,最后将分量信号频域图谱与实验所用电梯的运动部件的相关转动频率进行比对,找出频率相近且振幅较大的噪声分信号,那么此幅值大的信号即是噪声的主要来源,从而指导电梯维修人员准确地找到电梯噪声的主要来源部件。

This article proposes a method of using variable mode decomposition to identify the main moving components that generate noise in elevators,in response to the difficulty in identifying the source of elevator noise.In the experimental analysis section of the article,the main focus is on the different frequencies of the rotating components of the elevator,such as the traction wheel,reverse rope wheel,and speed limiter.The noise signals collected by the signal acquisition card are decomposed into variable mode decomposition,and the complex noise signals are decomposed into multiple single noise sub signals.Then,the sub signals are analyzed in frequency domain.Finally,the frequency domain spectrum of the component signal is compared with the relevant rotational frequencies of the moving components of the elevator used in the experiment to identify noise sub signals with similar frequencies and larger amplitudes.This signal with larger amplitudes is the main source of noise,guiding elevator maintenance personnel to accurately identify the main source components of elevator noise.