Simulation-based automatic code generation for ECUs in distributed control systems, applied in a testbed for a hybrid vehicle drivetrain

In growing extent the functionality of technical systems is determined by software. This functionality, however, is spread over several distributed electronic control units (ECUs). Design and development of the software is done simultaneously with that of the technical system and the controller hardware. Therefore the complete system, consisting of mechanics, electronics and software, is first modelled in a simulation. In a next step, C-code for the ECUs is generated from the models. Code generation is supported by a tailored API to the runtime environment; this covers the complete controller hardware and the communication. Compared with a conventional development process, simulation-based development avoids implementation errors, enables an early behavior check and delivers an actual documentation-the Simulink model. Results of the code generation process and system evaluation are detailed for a DC/DC converter connecting a traction battery to a DC-link in a series hybrid drivetrain.