Mechatronic systems support the driver and provide feedback about the current vehicle dynamics in modern vehicles. Our company is successful in the development auf such mechatronic systems since more than a decade.
Our controls for electro-mechanical and -hydraulic steering systems meet highest requirements on driving safety and steering feel. By this we had serious impact on the development of electrical steering systems by using optimal controllers. These were tested successfully in experiments and are now deployed in serial products. We program new tools for the design of modern steering systems. With these it is possible to design the shape of orifices of steering valves optimally or to determine optimal values for gear ratios or inertias for superposition steering systems. With our own hardware-in-the-loop (HiL) systems we test EPS-actuators and new algorithms for steering feel.
For fast and comfortable dimensioning of electro-mechanical and –hydraulic braking systems we develop models and customer specific tools. We achieve optimal system behavior by developing innovative control algorithms. For example, our controller allow for an electro-mechanical brake booster to deliver a brake force requested by the driver, the brake assistant or a vehicle dynamics controller, with high dynamics and precision.
For the setup of application specific drivetrain models we have a library developed by us featuring models for components like dry or wet clutches, torque converter, differential gears and different actuators. For drivetrain systems we have developed and implemented controllers for throttle valves and cam shaft actuating, automated clutches and systems for optimal torque transmission.
For modern electrical vehicles we have developed models and software for energy management (recuperation).
Reliable vehicle models are essential for the development and the test of vehicle systems. We have developed an environment for the real-time simulation of vehicles. The open and modular model structure with exchangeable model components for body, suspension, tires, engine, drivetrain, braking and steering system, road and driver allows the setup of application specific models. We use these models for the development of vehicle dynamic controllers and observers as well as for testing components in hardware-in-the-loop (HiL) simulation.
Commercial vehicle models like dSPACE ASM are familiar to us from numerous projects.
The electrification of the drivetrain creates new challenges in the development of vehicles. ECUs and control algorithms are getting more complex, the energy efficiency requires optimization and the connection to the power grid needs to be considered. In established development processes time and money consuming system analysis with test benches and prototypes become necessary. With the development of a suitable environment the replacement of tests and experiments with physical test objects by virtual tests with simulated test objects become possible. This allows the testing of the design in an early stage of development, the reduction of the effort for prototypes and hence the increasment of cost effectiveness. Therefore, electric-vehicle specific models and controllers have been developed and compounded to a full vehicle dynamics model. In the next step, the controllers have been integrated into an overall AUTOSAR architecture. The simulation results allow the analyzation of the controller on the functionality level as well as on the software level.