Since today's automobiles are equipped with a lot of interconnected and interacting ECUs, hardware-in-the loop simulation needs to take its next technological step for testing these systems on the desktop. By connecting well-proven, independent simulators to each other to build a complex virtual car system, this goal was achieved. In this paper we presented a HIL simulation toolset that can cope with all problems that occur in such a system, such as: -Programming a multiprocessor system from one Simulink model by automatic code generation, -High-speed, real-time capable, interprocessor communication (time stamping, automatic process synchronization, etc.), -Flexible, central and unique user interfaces with comprehensive functionality for manual and automatic operation of the simulator, -Real-time vehicle animation, -Handling of multiple model versions/variants by using parameter sets from the MATLAB Workspace, -Designing different types of hardware topologies, depending on the desired use cases, -Setting up signal conditioning in a modular and flexible way, -Real-time capable models for engines, brake hydraulics, transmission, vehicles, etc., -Accessing all system variables (real-time system and ECU) for test automation purposes from a script language. Validation of this tools and cocepts has been done on a simulator. In this application four powertrain/chassis ECUs run with high-end simulator topology, which even allows to disconnect parts of the simulators in order to use them as standalone HIL simulators for single ECUs. The number of errors found on the simulator within the first 3 months (in an early stage of the development process) multiplied by the cost difference to troubleshooting at a late stage of the development process indicates that a return-on-invest for the simulator can be achieved in about 6 months. This calculation is based on the assumption that troubleshooting at a late stage of the development process is about 10-15 times more expensive than at an early stage. Moreover, this type of simulator reduces the investment for prototype cars and thus makes it more profitable.
A hardware-in-the-loop test bench for the validation of complex ECU networks
Ein Echtteilprüfstand zur Validierung komplexer Netzwerke von Steuereinheiten
2002
8 Seiten, 14 Bilder, 8 Quellen
Conference paper
English
A hardware-in-the-loop test bench for the validation of complex ECU networks
Automotive engineering | 2002
|A Hardware-in-the-Loop Test Bench for the Validation of Complex ECU Networks
SAE Technical Papers | 2002
|2002-01-0801 A Hardware-in-the-Loop Test Bench for the Validation of Complex ECU Networks
British Library Conference Proceedings | 2002
|A hardware-in-the-loop test bench for production transmission controls software quality validation
Automotive engineering | 2007
|A Hardware-in-the-loop Test Bench for Production Transmission Controls Software Quality Validation
SAE Technical Papers | 2007
|