Impact of real-time measurements of operating conditions on effectiveness and accuracy of vibrationbased maintenance policy:a case study in paper mill

摘要

Relevant and reliable data from the surroundings in addition to the vibration measurements are required th achieve effective diagnosis and prognosis when a vibration-based maintenance(VBM)policy is used.The main conclusion is that the variation in the machine load and speeds influences the amplitudes of rolling element bearing defect frequencies.Therefore, changes in the machine speed and load should be considered when interpreting vibration spectra.This will improve the effedtiveness and accuracy of fault diagnosis and prediction of the time to maintenance action.The paper classifies stoppage times and highlights the reasons behind them. also,it discusses the consequential economic losses inceuued by unplanned stoppages.During the period covered by this study (58 days),the total stoppage time was about 76.6 days and caused appreciable economic losses of about 2.3 million SEK.