Hardware in the Loop (HiL) CT-AUT Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   In a HiL system, what is the role of I/O interfaces?

   • ATo compile the ECU software
   • BTo connect the real-time processor to the ECU under test, converting signals between the digital simulation and the ECU's electrical levels
   • CTo store the test data for later analysis
   • DTo provide power to the ECU
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which of the following is a key component of a Hardware-in-the-Loop (HiL) system?

   • AReal-time processor
   • BWind tunnel
   • CCAN bus analyzer
   • DInternal combustion engine
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   A company is developing a new electric power steering (EPS) ECU. They need to test the ECU's response to various road conditions, including icy roads, potholes, and high-speed maneuvers. The tests must be repeatable and run 24/7. Which testing approach is most suitable?

   • ASoftware-in-the-Loop (SiL) testing with the compiled ECU code.
   • BFull vehicle testing on a test track.
   • CHardware-in-the-Loop (HiL) testing with a real-time vehicle dynamics model.
   • DModel-in-the-Loop (MiL) testing with the ECU software model.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A HiL test is being designed to verify that an engine ECU enters a safe state when the coolant temperature sensor fails. The sensor is a variable resistor that outputs a voltage. The test needs to simulate a short circuit to ground. What is the most appropriate way to inject this fault?

   • AChange the plant model's coolant temperature to a very high value.
   • BUse a fault insertion unit to short the sensor signal line to ground.
   • COverride the sensor signal in the plant model to output 0 V.
   • DDisconnect the sensor signal line from the ECU.
   Reveal Solution Discussion Select an answer first
6. 15expert · hard

   A HiL test for a hybrid vehicle's powertrain control module (PCM) is being set up. The plant model includes the internal combustion engine, electric motor, and battery. The PCM communicates via CAN bus. The test engineer notices that the CAN messages from the plant model are sometimes delayed, causing the PCM to enter a safe state. What is the most effective solution?

   • AReduce the plant model's step size to 0.5 ms.
   • BUse a slower CAN baud rate to reduce transmission errors.
   • CIncrease the priority of the CAN message transmission task in the real-time processor.
   • DAdd a buffer to the CAN interface to store messages until they can be sent.
   Reveal Solution Discussion Select an answer first