Results and Benefits
The results received from the co-simulation showed an increased braking distance caused by a reduction of the friction co-efficient when the braking pad's temperature increased. After the analysis with the co-simulated model (MotionView/Activate) the results were compared and validated with results from an existing complex model taken from literature.
The results from the literature were then included into the MotionView/Activate model to validate the Ankers model. The results (1D) showed a very good correlation with the 3D model. After that, a braking maneuver in a straight line (showing the braking distance) was analyzed. The results showed that the co-simulation results were more accurate than those received from a multibody simulation only. When the temperature is taken into consideration, the example model shows that the vehicle would stop after 54m; without considering the effect the increased temperature has on the system, the simulation model resulted in a stop after 50m. Four meters, that really can make a difference when developing a brake system, hence the received results showed that the temperature has an important effect on the brake system. To receive more accurate results at the early stages of the product development process, this effect has to be considered already within the concept phase of the project.
The good results Ankers received with this study proved that Ankers is prepared to include cosimulation into their service portfolio. The study also shows that Activate offers a perfect addition to multibody systems, providing the possibility to include block diagram models to complete the overall system in a very easy manner, that makes it look “natural”. In this way the engineers can stay within their familiar simulation environment while contributing to the system approach.
In the next step the study might concentrate on the thermal model, considering also the increase of the temperature of the hydraulic oil (and other effects, to create a more detailed model) and how this influences the performance of the overall braking system. Another possible study would be to analyze the same system when it is ventilated.