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Expanding Haptic Workspace for Coupled-Object Manipulation

[+] Author Affiliations
Ryan A. Pavlik, Judy M. Vance

Iowa State University, Ames, IA

Paper No. WINVR2011-5585, pp. 293-299; 7 pages
doi:10.1115/WINVR2011-5585
From:
  • ASME 2011 World Conference on Innovative Virtual Reality
  • ASME 2011 World Conference on Innovative Virtual Reality
  • Milan, Italy, June 27–29, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4432-8
  • Copyright © 2011 by ASME

abstract

Haptic force-feedback offers a valuable cue in exploration and manipulation of virtual environments. However, grounding of many commercial kinesthetic haptic devices limits the workspace accessible using a purely position-control scheme. The bubble technique has been recently presented as a method for expanding the user’s haptic workspace. The bubble technique is a hybrid position-rate control system in which a volume, or “bubble,” is defined entirely within the physical workspace of the haptic device. When the device’s end effector is within this bubble, interaction is through position control. When exiting this volume, an elastic restoring force is rendered, and a rate is applied that moves the virtual accessible workspace. Existing work on the bubble technique focuses on point-based touching tasks. When the bubble technique is applied to simulations where the user is grasping virtual objects with part-part collision detection, unforeseen interaction problems surface. This paper discusses three details of the user experience of coupled-object manipulation with the bubble technique. A few preliminary methods of addressing these interaction challenges are introduced.

Copyright © 2011 by ASME
Topics: Haptics

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