Dynamic Prediction of Friction Torque Reliability of Super-Precision Rolling Bearings

In order to predict the future state of friction torque of satellite momentum wheel bearings, firstly, the 450 original data of bearing friction torque were obtained by experiment and the data were divided into 15 groups. Secondly, variation intensity and reliability of each group were calculated based on the grey confidence level and the closest 5 variation intensities were linearly fitted based on the bootstrap-least square method and the estimated truth values and intervals of variation intensity and reliability were obtained based on the maximum entropy method. Finally, the dynamic prediction was realized and prediction error is not more than 4.2%.