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Desktop Simulator for System Simulation

Johan Lindqvist
Göteborg : Chalmers tekniska högskola, 2018. Master's thesis - Department of Mechanics and Maritime Sciences; 2018:13, 2018.
[Examensarbete på avancerad nivå]

Simulation is today an important tool during the development and verification of new products in the automotive industry. Volvo Group has a Simulink-based simulation model of a powertrain, called GSP, which is used to simulate all the components of the powertrain. It can for instance be used to find the fuel consumption during different driving cases. GSP uses a virtual driver model that responds to a driving cycle and gives the powertrain model inputs by the throttle and brake pedal. Recently, a real-time version of GSP was connected to a driving simulator rig with the intent of putting a human driver in the loop. This connection enables the powertrain model to get real throttle and brake inputs by a driver sitting in the simulator rig. The purpose of this thesis is to evaluate the driver model, improve the connection and investigate other possible benefits of connecting GSP to a driving simulator. This has been tested by letting five test drivers drive in the simulator under different conditions. To provide the drivers with different driver aids and with information normally found on a dashboard, a separate Simulink model has been developed. Two driver aid systems have been developed, one that shows the height profile of the upcoming road and one that shows the current operating point of the engine. The test results show that the driver model provides results similar to those from a real driver, even though the real drivers input more fluctuating throttle signals. When using the driver aids, the wanted driving behaviour has been achieved. It has also been found that changes of parameters in GSP can be felt by the driver in the simulator. This makes the setup suitable for developing new systems including autonomous functions, and to a certain extent tuning powertrain parameters. Furthermore, the setup can be used to test driving situations that would be complicated to program the driver model to drive.

Nyckelord: Desktop simulator, System simulation, Matlab, Simulink, Driver model, Driver in the loop, Fuel consumption

Publikationen registrerades 2018-07-05. Den ändrades senast 2018-07-05

CPL ID: 255528

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