Automotive manufacturers have invested heavily in hardware-in-the-loop (HIL) environments and built extensive libraries of plant models, restbus configurations, and test cases. However, when validation moves to software-in-the-loop (SIL) environments, these artifacts often have to be recreated for virtual testing. This duplication increases engineering effort, introduces inconsistencies, and slows down validation activities.
At the same time, automotive software is becoming increasingly complex while development cycles continue to shorten. As a result, OEMs are looking for more efficient ways to use existing validation artifacts across SIL and HIL environments. The dSPACE tool chain supports this approach by enabling the reuse of models, communication setups, ECU artifacts, and test projects across both environments.
What roles do SIL and HIL play in the validation workflow?
SIL and HIL are complementary validation approaches used at different stages of development. While SIL supports early and scalable testing in a virtual environment, HIL validates software behavior on real ECU hardware under realistic operating conditions.
SIL helps teams:
- Start validation earlier
- Automate regression testing
- Debug and iterate quickly
- Execute tests at scale
HIL helps teams:
- Validate real-time behavior
- Verify timing-critical functions
- Test with physical interfaces and hardware
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