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Design and evaluation of an omnidirectional active floor for synthetic environments
Örebro University, School of Science and Technology. (Centre for Applied Autonomous Sensor Systems (AASS), Örebro university,Sweden)
University of Skövde.
(English)Manuscript (preprint) (Other academic)
Abstract [en]

In the case of an application with a freely moving user it could be feasible that a simulator that facilitates real running, walking, and crawling can achieve a higher feeling of presence and situation awareness, and therefore potential training effect, compared to a simulator without such facilities. Omnidirectional walking is a research topic that has yielded a number of diverse solutions, but most are still within their prototype stages. Solutions can be expensive, mechanically complicated and in some cases unpractical. The complexity of existing solutions stems in the fact that they are two dimensional, given the normal two dimensional translation of human walking. If instead the problem is viewed upon from an angle of effect, another alternative is available. A two dimensional floor has the purpose to constantly allow translation in any direction, while it also transports the user towards its central region. This is to always have a marginal in all directions for changes in user translation direction or velocity. The effect of this is that a floor could be constructed to always facilitate transportation of the user towards its center, regardless of where on the floor’s surface the user is situated. This paper describes the design and evaluation of a powered omnidirectional floor that reduces the complexity of omnidirectional walking from two dimensions to one dimension. The floor is utilized to create a synthetic environment for training.

National Category
Robotics
Research subject
Computer and Systems Science
Identifiers
URN: urn:nbn:se:oru:diva-21068OAI: oai:DiVA.org:oru-21068DiVA, id: diva2:477436
Available from: 2012-01-13 Created: 2012-01-13 Last updated: 2017-10-17Bibliographically approved
In thesis
1. Convergence in mixed reality-virtuality environments: facilitating natural user behavior
Open this publication in new window or tab >>Convergence in mixed reality-virtuality environments: facilitating natural user behavior
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis addresses the subject of converging real and virtual environments to a combined entity that can facilitate physiologically complying interfaces for the purpose of training. Based on the mobility and physiological demands of dismounted soldiers, the base assumption is that greater immersion means better learning and potentially higher training transfer. As the user can interface with the system in a natural way, more focus and energy can be used for training rather than for control itself. Identified requirements on a simulator relating to physical and psychological user aspects are support for unobtrusive and wireless use, high field of view, high performance tracking, use of authentic tools, ability to see other trainees, unrestricted movement and physical feedback. Using only commercially available systems would be prohibitively expensive whilst not providing a solution that would be fully optimized for the target group for this simulator. For this reason, most of the systems that compose the simulator are custom made to facilitate physiological human aspects as well as to bring down costs. With the use of chroma keying, a cylindrical simulator room and parallax corrected high field of view video see-though head mounted displays, the real and virtual reality are mixed. This facilitates use of real tool as well as layering and manipulation of real and virtual objects. Furthermore, a novel omnidirectional floor and thereto interface scheme is developed to allow limitless physical walking to be used for virtual translation. A physically confined real space is thereby transformed into an infinite converged environment. The omnidirectional floor regulation algorithm can also provide physical feedback through adjustment of the velocity in order to synchronize virtual obstacles with the surrounding simulator walls. As an alternative simulator target use, an omnidirectional robotic platform has been developed that can match the user movements. This can be utilized to increase situation awareness in telepresence applications.

Place, publisher, year, edition, pages
Örebro: Örebro universitet, 2012. p. 71
Series
Örebro Studies in Technology, ISSN 1650-8580 ; 53
Keywords
Mixed reality. augmented reality, augmented virtuality, head mounted display, omnidirectional floor, natural interface, telepresence
National Category
Computer and Information Sciences
Research subject
Computer and Systems Science
Identifiers
urn:nbn:se:oru:diva-21054 (URN)978-91-7668-852-6 (ISBN)
Public defence
2012-02-10, Hörsal L1, Långhuset, Örebro universitet, Fakultetsgatan 1, Örebro, 11:15 (Swedish)
Opponent
Supervisors
Available from: 2012-01-12 Created: 2012-01-12 Last updated: 2018-01-12Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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