Remaining life time prediction of bearings using K-star algorithm – a statistical approach

The role of bearings is significant in reducing the down time of all rotating machineries. the increasing trend of bearing failures in recent times has triggered the need and importance of deployment of condition monitoring. there are multiple factors associated to a bearing failure while it is in operation. hence,a predictive strategy is required to evaluate the current state of the bearings in operation. in past,predictive models with regression techniques were widely used for bearing lifetime estimations. the objective of this paper is to estimate the remaining useful life of bearings through a machine learning approach. the ultimate objective of this study is to strengthen the predictive maintenance. the present study was done using classification approach following the concepts of machine learning and a predictive model was built to calculate the residual lifetime of bearings in operation. vibration signals were acquired on a continuous basis from an experiment wherein the bearings are made to run till it fails naturally. it should be noted that the experiment was carried out with new bearings at pre-defined load and speed conditions until the bearing fails on its own. in the present work,statistical features were deployed and feature selection process was carried out using j48 decision tree and selected features were used to develop the prognostic model. the k-star classification algorithm,a supervised machine learning technique is made use of in building a predictive model to estimate the lifetime of bearings. the performance of classifier was cross validated with distinct data. the result shows that the k-star classification model gives 98.56% classification accuracy with selected features. © school of engineering,taylor’s university.