The wavelet based denoising has proven its ability to denoise the bearing vibration signals by improving the signal-to-noise ratio (SNR) and reducing the root-mean-square error (RMSE). In this paper seven wavelet based denoising schemes have been evaluated based on the performance of the Artificial Neural Network (ANN) and the Support Vector Machine (SVM), for the bearing condition classificati...

Equipment specifications tend to quote highest achievable performance; but this specification does not tell the whole story of machine behaviour. In the case of shovels, many criteria are used for selecting new equipment, generally related to capital and operating cost, capacity, digging forces, reach, loading rate, and propel rate. Some are competing objectives, such as high loading capacity a...

According to the actual working conditions of the Vribbed belt, automobile V-ribbed belt fatigue tester machine is designed to test for the automobile engine Vribbed belt fatigue wear. Finite-element analysis software ANSYS is employed to perform finite-element analysis on fatigue testing machine load shaft, bearing, universal joint key parts of the finite-element analysis, and to analyze the m...

Life prediction of rolling element bearing is the urgent demand in engineering practice, and the effective life prediction technique is beneficial to predictive maintenance. Support vector machine (SVM) is a novel machine learning method based on statistical learning theory, and is of advantage in prediction. This paper develops SVM-based model for bearing life prediction. The inputs of the mod...

The formation of waviness on the working surfaces bearing parts is associated with fluctuations in size cut layer metal and changes components cutting force. Laplace operators were used to model centerless grinding system based construction transfer function characteristic equation. It was found that depends position hodograph movement vector center part complex plane, which turn geometric para...

A concept of new test stand for investigating fatigue strength of plain bearing surface layer has been presented in the paper. The machine with rotating load vector was designed, built and experimentally verified in tribological laboratory of the Technical University of Gdańsk. The machine of such a principle of slide bearing surface layer load generation is, according to ISO 7905 standard, a b...

To experimentally verify a new test stand for investigating fatigue strength of plain bearing surface layer some biand three-metallic thin-walled bearing bushes have been tested. A lining of the bearing was made of CuPb30 alloy. PbIn7 overlay was employed for tree-layer bearings. Typical views of observed bearing surface fatigue failures are presented and analysed in the paper. The MWO test rig...