Academic Journal of Science and Technology ISSN: 2771-3032 | Vol. 13, No. 3, 2024 182 Automated Testing Platform and Implementation Based on HIL Yongjian Zhu, Manna Wang, Yuzhe Wang, Muzhapa, Nirunze Yang CATARC Automotive Test Center (Tianjin) Co., Ltd., China Abstract: In-vehicle automated testing is to verify and evaluate the functions and performances of in-vehicle systems through automated testing tools and technologies. This paper introduces an automated test platform based on hardware-in-the-loop (HIL), which aims to improve the accuracy and efficiency of the test, reduce the error caused by human factors, and ensure the stability and reliability of the vehicle system. In this paper, the architecture design, characteristics, basic functions, test steps and advantages of HIL automated testing platform are discussed in detail. Finally, the effectiveness of the platform is verified by practical application cases. Keywords: HIL, automated testing, in-vehicle systems, functional testing, performance testing, safety testing. 1. Overview of HIL Automated Test Platform HIL (Hardware-in-the-Loop) automated test platform is a method of testing embedded software or hardware in a simulation environment, which verifies and evaluates the performance and function of software or hardware by simulating the actual working conditions. In the in-vehicle system, HIL automatic test platform is widely used in the function test and performance evaluation of various subsystems, such as in-vehicle entertainment system, navigation system, ECU (Electronic Control Unit) and so on. The following details the architecture design, features and basic skills of the HIL automated testing platform. 2. Architecture Design The architecture design of the HIL test platform includes the following parts: 2.1. Simulation platform The simulation platform is the core part of HIL automated testing, which can simulate various working environments and running States of the in-vehicle system through software simulation technology. In the early stage of hardware development or when the hardware is not ready, testing through the simulation platform can find and solve potential problems in advance, saving development time and cost. 1) Simulation model: The simulation model is used to simulate each part of the in-vehicle system, including sensors, actuators, communication interfaces, etc. The accuracy and reliability of the simulation model directly affect the accuracy of the test results. 2) Hardware interface: The hardware interface is used to connect the simulation platform and the actual test equipment to ensure that the simulation data can be accurately transmitted to the system under test and the feedback data can be obtained from it. 2.2. Test environment Test environment refers to building a test environment including simulation model, actual hardware and test tools to ensure that the test environment can simulate the actual working conditions. 1) Actual hardware: The actual hardware includes various modules in the in-vehicle system, such as ECU, sensors, actuators, etc. Testing with actual hardware can verify its performance and functionality under real working conditions. 2) Test tools: Test tools are used to execute test scripts, collect and analyze test data, and generate test reports. Common testing tools include automated testing software, data acquisition systems and so on. 2.3. Automated testing tools Automated testing tool is an important part of HIL automated testing platform, which can automatically execute test scripts, collect and analyze test data, and generate detailed test reports. Automated testing tools mainly include the following parts: 1) Test script: The test script is the core of automated testing. By writing test scripts, you can automatically perform various test operations, such as starting and stopping the system, simulating user operations, sending and receiving data, and so on. 2) Data acquisition system: The data acquisition system is used to monitor and record the data generated during the test in real time, such as sensor readings, system status, communication data, etc. 3) Test report generation tool: The test report generation tool automatically generates a detailed test report based on the test results, including test purpose, test process, test results, and problem analysis and solutions. 3. Characteristics The HIL automated test platform has the following notable features: 1) High degree of simulation: The HIL test platform can truly simulate the working environment and operation status of the in-vehicle system through high-precision simulation models and hardware interfaces to ensure the accuracy of the test results. 2) Real-time: HIL test platform can monitor and record test data in real time, find and solve problems in time, and improve test efficiency. 3) Repeatability: Through automated testing tools, the same test cases can be executed repeatedly to ensure the 183 consistency and repeatability of test results. 4) Comprehensive coverage: The HIL test platform can cover all parts of the in-vehicle system, including function test, performance test, safety test, etc., to ensure the comprehensive test of the system. 4. Basic Functions The HIL automated test platform has rich functions and can meet various test requirements of the vehicle system. The following details the basic functions of the HIL automated test platform: 4.1. APP testing 1) Function test: test whether each function of APP operates normally, such as login, navigation, audio playback, etc. 2) Interface test: test whether the interface display of APP is correct, including whether the text, icon, button and other elements are displayed correctly. 3) User operation process test: test whether the user operation process is smooth, including user input, operation feedback, etc. 4.2. Locomotive test 1) A Function test: test various functions of the in-vehicle system, including navigation, audio playback, Bluetooth connection, etc. 2) System interaction test: test the interaction between the in-vehicle system and the mobile phone APP or other in- vehicle equipment, such as data synchronization, remote control, etc. 3) Performance test: test the performance indicators of the in-vehicle system, such as response speed, system stability, etc. 4.3. BOB board test BOB (Breakout Board) board is used to connect and control various electronic modules and sensors, which is widely used in automotive information entertainment system, body control system and so on. 1) Function test: test the functions of the BOB board, such as signal transmission, data processing, etc. 2) Interface test: test the interfaces between the BOB board and other modules or equipment, including data communication interface, power interface, etc. 3) Performance test: test the performance indicators of the BOB board, such as signal transmission rate, data processing capability, etc. 4.4. ECU test ECU (Electronic Control Unit) is the core control module in the vehicle system, which is responsible for controlling the engine, transmission, braking system and so on. 1) Control logic test: test whether the control logic of ECU is correct, such as engine start and stop, transmission shift, etc. 2) Communication test: test whether the communication between ECU and other in-vehicle systems is normal, including CAN bus communication, LIN bus communication, etc. 3) Fault diagnosis test: test the fault diagnosis function of ECU, such as fault detection, fault code reading and clearing, etc. 4.5. OTA background test OTA (Over-the-Air) background test is used to test the background functions of the remote upgrade system, including the upload, download, installation and other processes of the upgrade package. 1) Upload test: Test the upload function of the upgrade package, including file upload speed, file integrity, etc. 2) Download test: Test the download function of the upgrade package, including file download speed, file integrity, etc. 3) Installation test: test the installation function of the upgrade package, including whether the installation process is smooth and whether the installed system runs normally. 4.6. QNX System Test QNX is a real-time operating system, which is often used in the automotive field, and the HIL automated test platform can test its stability and performance. 1) Functional test: test the functions of QNX system, such as task scheduling, memory management, etc. 2) Performance test: test the performance indicators of QNX system, such as task response time, system throughput, etc. 3) Stability test: test the stability of QNX system under long time operation, including system crash rate, memory leak and other problems. 4.7. VT board test VT board is a high-performance communication interface board, which is widely used in industrial automation, data acquisition and monitoring, communication systems and other fields. 1) Communication test: test the communication function of VT board, including data transmission rate, communication stability, etc. 2) Interface test: test various interface functions of VT board, such as Ethernet interface, serial port, etc. 3) Performance test: test the performance indicators of the VT board, such as data processing capability, signal transmission quality, etc. 5. Conclusion The HIL automated test platform achieves a comprehensive test of the in-vehicle system through a highly simulated simulation platform, a perfect test environment and automated test tools. Its features include high simulation, real- time, repeatability and comprehensive coverage. Its basic functions include APP test, locomotive test, BOB board test, ECU test, OTA background test, QNX system test and VT board test. HIL automated testing platform is of great significance in improving the accuracy and efficiency of testing, reducing costs and ensuring security. Acknowledgements This paper was supported by References [1] Wang, D., & Smith, J. (2020). Automated Testing in the Automotive Industry: Current Status and Future Directions. IEEE Transactions on Automation Science and Engineering, 17(3), 987-1003. [2] Zhang, L., & Lee, K. (2019). Hardware-in-the-Loop Testing for Advanced Driver Assistance Systems. Journal of Automotive Safety and Testing, 14(2), 45-59. 184 [3] Kim, H., & Park, S. (2021). Integration of HIL and SIL for Efficient Automotive Testing. International Journal of Automotive Technology, 22(1), 123-134. [4] Chen, Y., & Liu, X. (2018). Application of Machine Learning in Automotive Testing. 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