Real-time prediction method for remaining useful life of remanufactured work rolls based on pulsed eddy current monitoring and Wiener process
During hot rolling,the cladding layer of remanufactured work rolls is susceptible to complex performance degrada-tion,affecting the quality of the rolled products.For real-time degradation monitoring and life prediction of these rolls,an on-line pulsed eddy current monitoring methodology and system were developed.Using the Variational Mode Decomposition—Hilbert(VMD-Hilbert)method,the increment of the marginal spectral energy sum within the 0～5000Hz frequency range was extracted as the roll degradation characteristic.A state degradation model accounting for individual variability was then formu-lated.Through the integration of the Expectation-Maximization algorithm(EM)and Kalman smoothing filter,the adaptive es-timation of unknown parameters within the model was achieved.The Analytic Hierarchy Process(AHP)was employed to fuse historical and real-time monitoring data,facilitating real-time residual life prediction for the remanufactured work rolls.Empiri-cal evaluations indicated the capability of the proposed method to forecast the residual lifespan of these rolls,suggesting its po-tential application in related fields.
residual life predictionremanufacturingwork rollpulsed eddy currentWiener process
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