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Optimal Secondary Controls Using a Configurable Haptic Interface

This project addresses the growing complexity of automobile dashboards and the rising distractions for drivers by introducing a configurable haptic interface. By consolidating multiple controls into a single adaptable interface that offers visual, haptic, and auditory feedback based on the task, we aim to improve user performance without causing confusion. Our research includes designing, testing, and virtually prototyping these panels while also exploring how information bandwidth varies with different feedback properties. Additionally, we investigate the sensory interaction in virtual environments and how haptic cues enhance user experience.

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Optimal Secondary Controls Using a Configurable Haptic Interface

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  1. Optimal Secondary Controls Using a Configurable Haptic Interface William Durfee Department of Mechanical Engineering University of Minnesota Supported by Center for Transportation Studies Contributing players Senthil S., Rahul Akolkar

  2. The problem • Automobile dashboards getting crowded • Drivers do more while driving • Distractions on the rise

  3. The solution • Replace many controls with single control • Control takes on visual, haptic, auditory characteristics tailored to task • Properties change with task • All without confusing the driver

  4. Project tasks • Design, fabricate, test configurable panel control that uses visual, aural, haptic feedback to aid user in task performance • Determine how information bandwidth depends on haptic, aural properties • Conduct human factors test in a driving simulator

  5. Is it the iDrive?

  6. Virtual product prototyping • Apply virtual reality technology to create product prototypes • Move beyond CAD-based visual rendering See Hear Touch ? ?

  7. Panel controls: simplified paradigm for research • Fixed in space, single d-o-f, low-force, simple graphics • Sufficiently complex to enable exploration of research questions

  8. Apparatus

  9. Perceptual experiments • Impact of display “quality” on • Perceived level of realism • Ability of user to perform specified design tasks • Understand sensory interaction in multi-model virtual environments • Which sense dominates • Can you trick the sensory system…to your advantage?

  10. Probing experiments • Compare virtual to real materials • Sight/sound/touch • With or without sensory conflict

  11. What we learned • Virtual environment does well when emulating soft materials • Haptic cues are important for matching • Adding visual or sound cues to haptics improves perceived quality of match • Subjects tended not to use sound cues for matching

  12. Human motor performance with visual/haptic interface • What should haptic knob feel like for a selection task? • Vary target haptics, background haptics • Best haptics for rapid selection: target damping • With good haptics, can perform secondary tasks rapidly leaving more time for primary navigation task

  13. Technology development tasks • Networked architecture for three control computers (visual/haptic/aural) • New control technology (visual/haptic/aural)

  14. Technology • Haptics • Matlab xPC Target for real-time control • Aural • Synthetic sound • Summation of decaying sinusoids • DirectSound for synchronized, real-time sound production • Visual • Windows based tools for visual effects • NVIDIA GeForce FX 5600

  15. System Architecture network VISUAL PC MATLAB HAPTIC PC AURAL PC UDP/IP UDP/IP Visual C++ [Graphics scene, Chromakey, UDP communication] xPC TARGET VIDEO CARD SERVO-AMP SPEAKERS MOTOR TV HUMAN KNOB CAMERA

  16. DirectShow *DirectShow System Overview: www.microsoft.com

  17. Virtual Scene + Chromakeyed User hand Pro/E  Open Inventor  Direct3D X Capture video for chromakey: DirectShow tools Graphic knob rotates using data via UDP from haptics controller

  18. STISIM Driving Simulator

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