Design Of An Intelligent Evaluation System For Bearing Status Based On Virtual Instruments

The vibration and acoustic signals of railway bearings can reflect the working condition.The analysis of vibration and acoustic signals of railway bearings can accurately monitor and diagnose the working condition of bearings.This paper will introduce an intelligent evaluation system for railway bearing condition based on virtual instrument technology.The system adopts Lab VIEW software for program development,and uses analysis methods such as Filter Analysis,Power Spectrum Analysis,Envelope Spectrum Analysis,Cepstrum Analysis,Statistical Energy Analysis,Correlation Analysis,etc.for system design.Intelligent models are established and trained based on features such as RMS value and peak-to-peak value.The system is designed based on virtual instruments,which can easily modify and upgrade the system functions and greatly reduce the cost of bearing condition monitoring and fault analysis.This paper will focus on the following three aspects:(1)Firstly,this paper introduces the requirements of an intelligent evaluation system for railway bearing condition and its significance in railway bearing fault prediction and health management.Secondly,it introduces several signal analysis methods and provides a comprehensive understanding of typical fault characteristics and parameters of railway bearings from multiple perspectives.(2)Design an intelligent evaluation system for bearing condition based on Lab VIEW environment.Firstly,the functional requirements of the monitoring system were clarified.Secondly,the file structure design and function module division were carried out according to the requirements of the system,and an intelligent model of extreme learning machine was established.Then complete the program design and system settings for each module.Finally,train the extreme learning machine model and conduct performance testing and adjustments on each module of the system.(3)The test and analysis of the returned bearings show that the system’s functionality has achieved the expected effect,and the design of the system is practical.