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Target
Accurate fault diagnostics in rotary machines is generally approached by developing a physical model of faults and understanding the relationship between faults and measurable signals captured by a variety of sensors. Classical fault identification and classification models employ analytical, signal processing and statistical-based features of the sensor signals combined with suitable classifiers. These feature-classifier combinations are engineered by incorporating expert-based knowledge about characteristic signatures related to faults. The engineered-features have shown success for fault diagnostic in mechanical systems that exhibit similar signal characteristic, however the fault-specific nature of these features limits their performance for general signal monitoring. The goal of this thesis is to investigate and compare the performance of automatic feature extraction through unsupervised learning instead of feature-engineering.  

Background
The Tightening Technique group is currently supporting the Data Driven Services in the project “Predictive maintenance”. The student will contribute to the data analysis conducted by the team. The students will also use a graphical machine learning software and investigate its potential for feature learning. 

Mission

The performance of the proposed feature extraction model will be validated on sensor data collected from an experimental test-rig specifically designed to study characteristics of bearing and gearbox related faults. Feature learning on raw vibration signal possibly will extract vibration-features that can improve fault identification performance of subsequent classifier. Consequently, instead of feature-extraction, the feature-learning approach will be utilized to capture domain specific failure features. The feature-learning approach alleviates dependence on prior knowledge of the problem and proves beneficial in tasks where it is challenging to develop characteristic features”.  

Education requirement:                 
•    IT/computer sciences

Level of thesis project:

•    Master thesis

Qualification
This topic requires programming experience in Python, R or Matlab, as well as knowledge of machine learning methods and a strong interest in applying these techniques on real-world data. 

Additional information:
Our office is located in Sickla, Stockholm. 

As this is a project position for studies and not an employment, it does not qualify for seeking a work permit. We can therefore only accept applications from students who are either attending Swedish universities or are EU-citizens.

Company Presentaton

Great ideas accelerate innovation. At Atlas Copco Industrial Technique we team up with our customers to turn industrial ideas into smart manufacturing assembly solutions and innovative industrial tools. Our passionate people, expertise and service bring sustainable value to industries everywhere. 

We add value wherever we do business

The Atlas Copco Group serves customers through innovative compressors, vacuum solutions, generators, pumps, power tools and assembly systems. We are a global and diverse Group of many strong brands and around 34 000 employees representing different cultures in more than 180 countries. We have a wide range of positions so whatever your interests or area of expertise, we offer interesting challenges and the opportunity to grow.

Passionate people create exceptional things. We believe in challenging the status quo, always looking for a better way. Our leading edge technology enables us to innovate for a sustainable future. We believe that people make it happen and with us you are empowered to act. Your ideas can make a real difference and contribute to the quality of life for people everywhere.

Learn more at www.atlascopcogroup.com

Master Thesis - Extraction for Fault Identification in Rotary Machines under Machine-Learning

Ort
Utgår

2019-11-30

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