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Enhancing Simulation Testing: The Role of Motion Cues

This document explores the critical role of motion cues in simulation testing, particularly in highway driving simulators. It details the advancements in hardware and software, including upgrades to projectors and motion bases, to improve the accuracy and reliability of simulations. Key questions are addressed regarding the necessity and impact of motion cues on experiment results, motion sickness mitigation, and optimal methodologies for achieving realistic driving experiences. The insights stem from ongoing research and collaboration among experts in the field.

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Enhancing Simulation Testing: The Role of Motion Cues

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  1. The Role of Motion Cues in Simulation Testing Gregory Davis FHWA Office of Safety RD&T

  2. FHWA Highway Driving Simulator • Saturn SL1 Car Cab • 240 Degree Cylindrical Projection Screen • 3-DOF Electrical Servo Motion Base

  3. HDS Upgrade • Current Upgrade of System Hardware and Software is in Progress • SGI Onyx Infinite Reality has been replaced with Dell PCs • One ElectroHome Projector replaced with 3 Barco Projectors • Complete upgrade will total 5 Barcos for 240 Degree Field of View (’05)

  4. Computer Hardware • 5 Dell workstations will be used to drive each projector • Dell PCs use Quadro NVIDIA FX 3000G Graphics Cards • Low Cost with High Frame Rate

  5. Projectors • 3 Barco 909 Projectors now in place • Mounted above Car Cab on Circular Gantry Frame • Ability to deliver 2048 x 1536 Resolution

  6. Motion Base • 3 Electrical Servo Motors • Capable of Pitch, Roll, and Heave • +/- 8 degrees for Pitch and Roll each, 5 degrees combined • Heave 2.5 inches at about 2-3 hz

  7. Crossbow Inertia Gyroscope

  8. Vehicle Dynamics Model • 6 DOF Equations (although capable of only 3) • Simplified model of 4 speed Auto Transmission • Tire Skid Limits on side force and braking force • Steering wheel disturbances (force feedback) • Motion Base Control • Roadway Surface Conditions

  9. Issues and Questions? Which types of experiments require motion based cues? • Studies on Braking? Reaction Time=maybe not. Brake force=yes. • Studies on lane keeping-speed = yes • Studies on roadway design or sign comprehension = maybe, depends on experimental design

  10. …And More Questions? • If motion cues are required, how much motion is needed to achieve the desired effect? • Which method of motion is more conducive to achieving accurate and reliable results in a simulator, the traditional method or the vector substitution method? (e.g. tilting the car cab down {traditional} or up {vector substitution} during vehicle braking • Does the appropriate motion contribute to or mitigate motion sickness?

  11. Finally Do we need standards for motion cues?

  12. Acknowledgements Special Thanks to: Jason Williams (AAI Eng.) John Molino (SAIC)

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