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Thesis Work: Signal analysis of fretting damages on electrical connector systems

Innovation starts with being curious.

At Volvo Cars, we believe that being curious and truly committed to understanding people is the key to future success. We are people who care about other people, working together to create new technologies and innovations for safe, sustainable and convenient mobility. Want to join us?

 

Background

Fretting corrosion in connector systems for wiring harnesses, has for the last decades been recognised to have a negative impact on automotive electrical distribution systems. This problem is common for all car manufacturers, due to the tough environmental conditions prevailing where automotive components are positioned. In order to find ways of minimising warranty cost, fretting corrosion needs to be investigated and understood further.

 

Scope

The work involves studying the relationship between vibrations and fretting damages in connectors. The aim is to conclude what kind of analyses is needed in order to be able to predict the risk of fretting damages. The results will provide guidelines for evaluating critical parameters, such as acceleration and frequency, using fretting tests of connectors on a combustion engine rig or a vibration rig. The influence of external parameters such as temperature and humidity are also of interest. Furthermore, the work will include evaluation of different connector manufacturer’s insulators and terminals, to establish and document the corresponding frequency/amplitude profiles.

The scope may be adjusted depending on the profiles of the candidates.

 

Method

The parameters that are usually studied are acceleration, speed and displacement. Examples of analysis methods could be Fourier transforms, Power Spectral density (PSD), and possibly CAE analysis. When performing the chosen methodology, vibration rigs shall be used to verify the correctness of analysed parameters. Examples of sub tasks:

  • Literature study in order to find appropriate theoretical approaches for the thesis.
  • Implementation of the theoretical approaches into physical models.
  • Collect appropriate data in vehicle/test bench.
  • Evaluate the implemented models.
  • Perform a robustness and parametric study.
  • Documentation of results, presentation at Volvo Cars.

 

Do you fit the profile?

University education in Electronics, Mechanics or Applied Physics. Experience from the following areas may be of advantage:

  • Matlab
  • Structural dynamics
  • Signal quality
  • Corrosion science
  • Tribology
  • DEWESoft

 

Duration

  • Proposed start: 2019-03-01.
  • Duration: One term (30 ECTS).
  • This thesis work is suitable for two students working together.

 

How to learn more and apply
Please apply with: CV, cover letter, grades and references. For questions regarding the thesis work please contact Mattias Ingvarson, mattias.ingvarson@volvocars.com

We want your application at the latest 2019-02-01.

 

Who are we?

Volvo Cars is a company on a mission; to bring traditional car manufacturing into a connected, sustainable and smart future.

Since 1927, we have been a brand known for our commitment to safety, creating innovative cars that make life less complicated for our consumers. In 2010, we decided to transform our business, resulting in a totally new generation of cars and technologies, as well as steady growth and record sales. Today, we’re expanding our global footprint in Europe, China and the US, and we’re on the lookout for new talent.

We are constantly pushing our own skills and abilities to drive change in the automotive industry like never before. We are looking for innovative, committed people to join us in this endeavour and create safe, sustainable and connected cars. We believe in the power of people and will challenge and support you to reach your full potential. Join us and be part of Volvo Cars’ journey into the future.

Gothenburg, SE

Job requisition ID:  21213

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