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Thesis Work - Numerical optimization

Thesis Worker at Volvo Cars

Welcome to explore the world of Volvo Cars by writing your thesis with us! As a thesis worker in our organization you are supported by a supervisor who follows you during your project. All thesis projects are arranged in business critical areas and therefore you will be able to contribute to our company purpose – providing freedom to move in a safe, sustainable and personal way – from day one! 

 

 

Thesis Work: Numerical optimization methods for improving energy efficiency of Battery Electric Vehicles using wheel torques and steering angle.

 

At Vehicle Energy and Motion Control, our purpose is to develop and deliver the most energy efficient and situation adopted ride and drive experience. Evaluating driver input, surrounding information (e.g. camera, radar and route data) and Autonomous Drive request, as well as vehicle state sensor input, our software (mainly inhouse developed) coordinates the different actuators (engine, motors, brakes, steering) to fulfill our purpose and balance vehicle attributes. 

 

Background 
Electrification of vehicles introduces new possibilities to control the vehicle with electric motors as fast and precise actuators. User-related challenges such as range and long charging times however delay electricity as the primary source of energy. Furthermore, to minimize the environmental impact, energy efficiency needs to improve. Electrification of vehicles also introduces new control challenges as the level of over-actuation increases. Over-actuation means that there are several actuators that can solve the same control problem. As an example, braking can be done with two types of actuators: electric motors and friction brakes. Which actuator to use is known as a control allocation problem. The control allocation problem can be extended with an objective function that influences the choice of actuator. Research has been done on how to minimize energy consumption through optimization-based control allocation. Previous work has included finding an analytical solution to a quadratic program, but this method is limited when lateral and yaw motion of the vehicle is included in the degrees of control. An enabler for controlling both electric motors and wheel steering angles in order to minimize energy consumption is a numerical optimization method. 
 

Scope 
Develop a numerical optimization framework for control allocation of wheel forces through motor torque and wheel angles to reduce energy consumption for BEVs. 
Explore different numerical optimization methods and tools such as Optimica, CasADi, ACADO etc. and find the appropriate method for control allocation of wheel torques and wheel angles, especially suitable to include the cost function of energy losses. 
The outcome has potential to be published in a scientific journal or conference (depending on quality and ambitions). 
 

Profile 
· Since the project is part of a PhD research project in collaboration with Chalmers, at least one student should be from Chalmers University of technology. 
· Courses taken in vehicle dynamics, non-linear optimization and control are recommended. 
· Good knowledge of Matlab Simulink and other programming languages is meritable. 
· Both Mechanical and Mechatronic engineering are valuable. 
 

Application 
· Your application should include a CV, cover letter and transcript of courses and grades 
· Selection will be ongoing during the application period. We want your application as soon as possible, but no later than 2020-11-29. Please note that due to GDPR, we can't accept applications via email.
 

Duration 
· 20 weeks / 30 ECTS. 
· Starting date: January-February 2021 (Flexible). Estimated end date: Summer 2021 
· Number of students: 2 
· The work will be performed at the department of Vehicle Energy & Motion Control and the group of State Estimation, Volvo Cars Corporation, Göteborg 
Contact Supervisors: Juliette Torinsson (juliette.torinsson@volvocars.com) Derong Yang (derong.yang@volvocars.com) 
Manager: Anna Söderlund (anna.soderlund@volvocars.com)

 

Who are we?

Everything we do starts with people. Our purpose is to provide freedom to move, in a personal, sustainable and safe way. We are committed to simplifying our customers’ lives by offering better technology solutions that improve their impact on the world and bringing the most advanced mobility innovations to protect them, their loved ones and the people around them. 


Volvo Cars’ continued success is the result of a collaborative, diverse, and inclusive working environment. The people of Volvo Cars are committed to making a difference in our world. Today, we are one of the most well-known and respected car brands, with over 40,000 employees across the globe. We believe in bringing out the best in each other and harnessing the true power of people. At Volvo Cars your career is designed around your talents and aspirations so you can reach your full potential. Join us on a journey of a lifetime as we create safety, autonomous driving and electrification technologies of tomorrow.

Gothenburg, Sweden

Job requisition ID:  47388
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