HIL test bench for EPS steering systems

HIL test bench for EPS steering systems

Fields of application

  • Function development, optimisation and validation for EPS steering systems
  • Analysis of performance parameters and control quality within the HIL network
  • Simulation and validation of EPS steering behaviour in failure scenarios
  • Automated HIL road and approval tests

Test bench architecture and modules

  • Mechatronic integration of EPS steering systems,
    e.g. via
    • Flexibly adjustable and close-to-application mechanical fi xtures for different types of EPS steering systems
    • Integration of control devices, sensors and fi eldbus systems (CAN, FlexRay)
    • Integration of test item and vehicle models
  • Linear actuator to test variable forces and positions
    • Counter force: ± 12 … ± 25 kN
    • Stroke: ± 150 ... 300 mm
      Adjustment speed: 500 … 750 mm / s
    • Force and position control


  • Highly dynamic and accurate servo drives for steering purposes
    • Torques: ± 35 … ± 160 Nm
    • Steering rate: ± 2100 ° / s
    • Angle and torque control
  • Powerful simulation of vehicle electrical systems incl. energy refeed
  • Cut-off relay adaptor for highly automated simulations of electrical failures
  • Metrology to record
    • Control and power signal currents of the specimen actuator and ECU
    • Forces, positions, angles, torques and temperatures
  • Models and interface with real-time hardware
    (e.g. MATLAB / Simulink, dSpace)
  • Compact dimensions and design for use in HIL labs