Abstract

The goal of this work is association of several machine learning methods in a study of rotating machines with fluid-film bearings. A fitting method is applied to fit a non-linear reaction force in a bearing and solve a rotor dynamics problem. The solution in the form of a simulation model of a rotor machine has become a part of a control system based on reinforcement learning and the policy gradient method. Experimental part of the paper deals with a pattern recognition and fault diagnosis problem. All the methods are effective and accurate enough.

Highlights

  • The main tool in modern machine learning is an artificial neural network (ANN) [1]

  • Deep learning is emerging in reinforcement learning and continuous control systems [7, 8]

  • The results demonstrated that the rotor dynamics simulation program with the ANN module allows calculation rotor trajectory two times faster than a real time process

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Summary

Introduction

The main tool in modern machine learning is an artificial neural network (ANN) [1]. This work deals with applications of machine learning to rotating machines with fluid-film bearings. This part of the rotor dynamics problem can be implemented using ANNs [4]. Modern rotating machines can be equipped with a number of sensors. Analysis of their measurements can be automated using specialized ANNs. Analysis of their measurements can be automated using specialized ANNs These ANNs implement logistic regression [1]. This paper unites theoretical and experimental results achieved by the authors in applications of machine learning to simulation, diagnosis and control of rotating machines with fluid-film bearings

Shallow learning for rotor dynamics simulation and fault diagnosis
Multi-dimensional mapping for rotor dynamics simulation
Classification and pattern recognition tools for rotating machine diagnosis
Deep reinforcement learning for rotating machine control
Simulation and experimental results
Findings
Conclusions
Full Text
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