Hardware-in-the-Loop Simulator

The HILS-ATB is an integrated Hardware In the Loop Simulator (HILS) for Flight Control Unit (FCU) integration, verification and validation. The HILS-ATB extends traditional hardware in the loop simulation to provide fully automated FCU verification, from automated text execution through to results verification and reporting. Available with DO-330 tool qualification evidence, the HILS-ATB is ideal for DO-178C developments where the time, effort and cost of verification process compliance can become enormous.

For clients, the HILS-ATB supports on-site simulation, training, demonstration and maintenance of S-PLANE’s Flight Control Units. This high-fidelity, real-time dynamic simulator exercises the full functionality of S-PLANE’s FCUs, including injection of flight upset events and failure cases. The HILS-ATB is therefore ideal for system level training and demonstrations, with 3D visualisation on up to three external HD displays. Its built-in diagnostics suite also enables fast, on-site Remove & Replace (R&R) maintenance at both LRU and SRU levels.



  • Automated Test Bench (ATB) for Flight Control Units (FCUs)
  • Test case definition, automated text execution & reporting
  • High-fidelity, real-time, dynamic simulation
  • 3D Visualisation, graphical reporting and logging tools
  • DO-330 Tool qualification for DO-178C developments
  • Flexible hardware and software architecture for customisation
  • Optional SRU level testing for maintenance support


  • High-fidelity fixed and rotary wing aircraft dynamic models
  • Wind, atmospheric, magnetic field and gravity environment models
  • Complex ground-surface to landing gear interaction models
  • System specific sensor, actuator and propulsion models


  • On-site xFCU integration, verification, training and maintenance tool
  • Custom FCU development, verification and integration tool
  • System verification, demonstration & flight test preparation tool
  • Flight and mission simulation for GCS verification (with payload simulation)

Technical Specifications

Aicraft Fixed-Wing, Rotary-Wing, Multi-Rotor
Landing Gear Tricycle and Tail Dragger, Helicopter Skids/Feet
Propulsion Piston, Electric, Turbine Engines with Propeller/Rotor, Jet Thrust
Drive Train Slip Clutch and One-Way Bearings
Fuel Fuel Tank and Fuel Flow
Inertia Mass and Centre of Mass, Moment of Inertia
Sensors GNSS (Rover/Base Station), IMU, Air-Data, Magnetometer, Radar Altimeter
Actuators Digital and Analog Servos
Subsystems Engine Control, Power Management, Custom Subsystems
Wind MIL-F-8785C
Atmospheric International Standard Atmosphere (ISA)
Magnetic WMM, MIL-W-89500
Gravitational WGS-84
Earth Geometry WGS-84
Operator Interface Embedded GUI, Direct or Wireless Remote Access
Visualization Up to 3x HD 3D Displays (External) with View Control
Monitoring Scope Traces, Text Boxes, Virtual Horizon Display
Test Cases / Scenarios Time & Event Based, Failures and Degradation, Environmental Conditions
Data Logging 1, 10 and 100 Hz Selectable, Rolling Data Log
Internal Simulation Rate 5 kHz
Simulation Time More than 24 Hours
Interfaces RS-422/485/232, Ethernet, GPIO, PWM, Input Capture, ADC/DAC, MIL-STD-1553, S/HDLC
Connectors Client Customized, Front/Rear, Optional Break-Out, Signal Board and SRU Testing
Dimensions Housed 43U 19” Rack
Power Supply 110/220 VAC, 50/60 Hz


3D Visualisation
Fixed and Rotary Wing UAVs
High Fidelity Dynamic Models
Virtual Horizon Display
State Monitoring
Scenario Management