Testing new concepts in the field of closed-loop control is an important matter to the automotive industry. Especially in the domain of electric vehicles, there is a lot of ECU functionality targeting energy management and engine controlling that has to be developed and evaluated. Over the last decade, hardware-in-the-loop simulation has successfully been used to test new ECUs. However, in early stages of development, the target hardware is often not known and only parts of the final implementation is available. Furthermore, there are different domains involved in the development process, from an early behavioral model to the final integration into an ECU. In our project we propose a methodology and tool chain that uses the simulation of virtual ECUs across multiple domains. Virtual ECUs enable testing the functionality together with hardware-independent non-application relevant aspects (e.g. some parts of the basic software or the run-time environment), which effectively postpones the need for a close-to-production ECU prototype. In this paper, we compare different levels of ECU abstractions regarding their convergence to a real ECU and certain requirements that are imposed when developing electric vehicles. Here, we specifically aim at finding the best suitable level for the early stages of development, where many aspects of the final ECU are still not known and a HIL setup is not feasible. Nevertheless, one major goal of our project is to experiment and test the virtual ECU in the same tool environment that is commonly used in HIL setups to provide a certain reusability. In this context, this paper also presents current approaches for the reuse of tests across domains, which will be addressed further as our project advances.
Early simulation and testing of virtual ECUs for electric vehicles
EVS, Electric Vehicle Symposium, 26 ; 2059-2070
2012
12 Seiten, 4 Bilder, 25 Quellen
Conference paper
English
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