Implementation of a Hybrid Hardware-in-the-Loop (HIL) Test System for Automotive Software Validation and Verification

The automotive industry relies heavily on software to enhance safety, performance, and user experience. The increasing complexity of automotive software demands rigorous testing methodologies. Ensuring the quality and reliability of this software is critical. In this paper, we propose an innovative approach to software validation and verification using a Hybrid Hardware-In-the-Loop (HIL) test system. Our methodology integrates diverse hardware and software tools to establish a flexible and efficient testing environment. This environment can evaluate the Device Under Test (DUT) with minimal alterations. Our comprehensive solution includes the development of test strategies, plant model simulation, and compliance assurance, all in accordance with automotive standards such as ASPICE and ISO26262. We also introduce a Personality module for the DUT, enabling sequential testing of multiple products using the same HIL setup. This is achieved by loading a DUT-specific signal mapping configuration and adjusting the plant simulation model using a reconfigurable Input/Output FPGA device. This approach ensures a flexible and efficient testing process. The consistent test infrastructure, automation framework, and adaptable software repository facilitate smooth transitions as the DUT evolves. Furthermore, we extend our approach to the testing of high voltage components in power electronics. These components are converted to their equivalent low voltage counterparts using a transfer function that serves as a hardware-software interface. The low voltage equivalent circuits are then simulated using Simulink, an equivalent mathematical equation model, or circuit simulation model, facilitated by high-speed FPGA devices and a real-time operating system. Our methodology complies with industry standards and safety requirements, providing a robust solution for automotive software testing.