Search Results

Compared with the traditional bench testing approach, the virtual validation on a PC is more time-saving and cost-effective. However, the control software of an electronic control unit is typically developed together with suppliers and original equipment manufacturer, and each owns parts of the source code. So it is impossible to set up a simulation based on the original C code. Alternatively, to set up an equivalent model is usually time-consuming and less effective. In this work, Schaeffler describes how to develop a virtual testing method based on chip simulation for the series produced mechatronic active roll control system.

With the continuous growth in the emission requirements and higher riding comfort demand, the shift quality becomes more and more an important evaluation index of the automated transmission control algorithms. Traditionally, the shift quality is assessed subjectively by the driver's feeling and then adjusted based on the calibration engineer experience. This classical calibration has disadvantages, such as low reproducibility of the shifting event and a high dependence on the driver's driving habit, so here a model-based multi-objective optimization method is proposed, and the optimization of the clutch control parameters during the vehicle starting is used as an example. Firstly, a Modelica® based vehicle model is introduced. A second-order sliding mode control is applied to track the clutch position trajectory. The clutch engagement point and the clutch engagement speed in the slipping stage are taken as the optimization objects.