AG Fahrwerk | MONOCAB OWL

WG Management

Prof. Dr.-Ing. Rainer Rasche

TH OWL - Department of Electrical Engineering and Computer Engineering
Prof. Dr.-Ing. Rolf Naumann

Bielefeld University of Applied Sciences - Department of Engineering and Mathematics

Info about the chassis working group (drive and energy supply)

The working group coordinates and develops the electrical power supply in the MONOCAB and is responsible for the model-based design of the drive and brakes.

Energy supply
The electrical power supply consists of two main components (see figure):

Vehicle side components
- Battery of the company Akasol
- Charge controller from the company Intech
- Central_ECU from the company dSPACE
Charging station with components from Phoenix Contac

The charging station is connected to the charge controller for charging via a CCS connector and Powerline. On the vehicle side, communication during the charging process takes place via a CAN bus, which connects the charge controller, battery and Central_ECU. A Simulink Stateflow program was developed on the Central_ECU to control and monitor the charging process.

Longitudinal dynamics model

A model for describing the longitudinal dynamics of the vehicle is used primarily for model-based controller design for the traction drives and thus for realizing the overarching functions.

The model describes the main driving resistance forces acting on the vehicle. In addition to a purely translational view, it also includes the rotational dynamics of the wheels and the wheel-rail contact. This modeling depth is needed to ensure the frictional connection under different environmental conditions and driving maneuvers. The behavior of various system components in the form of state machines is modeled in outline in order to investigate the start-up and shut-down procedures, as well as the emergency behavior of the MONOCAB's control units on this model. In addition, it contains dead times of the communication via CAN bus, as well as the behavior of the sensors for determining the acceleration and speed of the MONOCAB.