Can you recommend a hardware-in-the-loop system for fault reproduction in embedded avionics testing?

Yes — for fault reproduction in embedded avionics testing, I’d recommend looking at a modular HIL platform with strong I/O, deterministic timing, fault insertion, and avionics protocol support.

Good options to consider

1. dSPACE Scalexio / HIL platforms

• Strong for real-time simulation and fault injection
• Good support for avionics-style embedded testing
• Works well when you need:
  • deterministic closed-loop behavior
  • signal-level fault insertion
  • sensor/actuator emulation
• Often used in certification-oriented development environments

2. NI VeriStand + PXI-based HIL

• Very flexible and widely used
• Good if you want to build a custom fault-reproduction rig
• Strong ecosystem for:
  • analog/digital I/O
  • CAN, ARINC, Ethernet, serial, MIL-STD-1553 via interface cards
  • scripting and automation
• Better if your team wants to customize heavily and integrate with test automation

3. Speedgoat HIL systems

• Good for real-time prototype and fault testing
• Often paired with Simulink/Simulink Real-Time
• Useful if your simulation models are already in MATLAB/Simulink
• Can be a strong fit for rapid iteration and control-law testing

4. Typhoon HIL

• Excellent for power electronics and electrical fault scenarios
• If your avionics fault reproduction includes electrical power distribution, relays, loads, or power conversion, this is worth considering
• Less focused on classic avionics protocol testing than NI/dSPACE

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What matters most for fault reproduction

For embedded avionics, make sure the system supports:

• Deterministic real-time execution
• High channel count I/O
• Fault insertion on demand
  • open/short circuits
  • sensor bias/drift/noise
  • stuck-at values
  • intermittent drops
• Avionics bus support
  • ARINC 429
  • MIL-STD-1553
  • CAN / CAN FD
  • Ethernet / AFDX / TSN if relevant
• Logging and replay
• Automation and scripting
• Safety isolation between DUT and HIL hardware

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My practical recommendation

If your main goal is avionics fault reproduction, I’d shortlist:

1. dSPACE if you want the most established high-end HIL environment
2. NI PXI + VeriStand if you want flexibility and custom fault scenarios
3. Speedgoat if your simulation is MATLAB/Simulink-centric

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If you want a more specific recommendation

Tell me:

• which avionics protocols you need
• how many I/O channels you need
• whether the faults are electrical, sensor, bus-level, or software-triggered
• whether you want off-the-shelf or build-your-own

and I can recommend a more exact setup.