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Typical Hardware-in-the-Loop System

A typical HIL testing system comprises components such as:

  • Processing unit for computing large and complex simulation models and for connecting the real-time model with the relevant I/O. The dSPACE SCALEXIO Processing Unit therefore provides multicore support and communication with the I/O via IOCNET for handling a high number of I/O and bus channels within the required real-time condition. 
  • Battery simulation components for providing the power supply to generate currents and voltages for the ECU for manual and automated tests. dSPACE offers various boards for controlling the battery simulation power supply, e.g., the DS2907 Battery Simulation Controller, the DS2642 FIU & Power Switch Board, and the DS2680 I/O Unit.
  • I/O interfaces for connecting the ECU with the testing system. For different test scenarios, dSPACE offers various boards with determined or freely configurable I/O interfaces, such as the SCALEXIO MultiCompact, HighFlex, and I/O boards.
  • Other auxiliary components such as load boards, and the possibility to perform electrical failure simulation for specific application scenarios. For this, dSPACE offers the Electronic Load Modules and the DS2642 FIU & Power Switch Board.

The unit under test is connected to the testing system. It usually consists of one or more electronic control units (ECUs) containing new functions or ECU software to be tested.

The software for configuring and automating the HIL test runs on a PC, as well as the software for parameterizing the simulation model and visualizing the simulation run. Test data management software can also be used.

dSPACE supports its customers by adapting the simulation hardware and test software to specific project requirements or by setting up the complete HIL test system. 

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