Four questions for Daniel Wanner

Tuesday, October 8, 2013

Daniel Wanner will shortly hold his licentiate seminar entitled “Faults and their influence on the dynamic behavior of electric vehicles”.

You have developed a methodology to analyze and classify faults for electric vehicles. Why do you think this is important?

-The electrification of vehicles brings new functionalities of the vehicle in terms of safety, comfort and handling. However, these innovative systems might also fail once in a while. Therefore it is important to know what type of fault in these systems that leads to what kind of failure in the vehicle.

What have you focused on?
I focused on faults in the electric driveline. All of its components are new to the automotive industry and therefore not as well-known as those of the internal combustion engine.

Over-actuated fault tolerant HEVs
Above: A vehicle with and without fault-tolerant control strategy. When a fault occurs leading to a failure braking the rear left wheel, only the vehicle with fault-tolerant control (green trajectory) keeps stable, avoiding an accident.

Which has been the greatest challenge in your work so far?
The biggest challenge was to limit the scope of the project. After I got the position, the project was defined very broad. However, to be able to analyze something in detail, you need to narrow down the scope in the beginning. In a later stage, the results can then be used to make more general conclusions again.

The seminar will be in a few days. How will you proceed from there?
– After the faults are analyzed and classified, I will use the results to develop new control strategies that can cope with the faults to help the vehicle to stay on the road. I will implement these strategies in a prototype vehicle to evaluate if the results from my simulations will be valid in real world experiments.

Daniel Wanner will hold his licentiate seminar at KTH on October 18th 2013.

Read more about the research project >>