Computer graphics processing and selective visual display system – Display peripheral interface input device
Reexamination Certificate
2004-10-20
2008-09-02
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
C345S157000, C345S163000, C345S172000, C703S002000, C715S701000
Reexamination Certificate
active
07420539
ABSTRACT:
A method of stabilizing a haptic interface and a haptic system using the same, are provided. The method comprises detecting a value of a physical parameter related to a motion generated by a human operator's action in an actual element included in the haptic device at each predetermined time interval, calculating a force to respond to the human operator reversely through the haptic device in the virtual environment in response to the value of the physical parameter, calculating a bounding parameter that satisfies first stabilization conditions in which energy generated during sampling and holding is to be dissipated by the haptic device and second stabilization conditions in which energy generated by the control system is to be passive, from the calculated force and the calculated value of the physical parameter, if the calculated bounding parameter is out of a predetermined bounding range, adjusting the calculated bounding parameter in the predetermined bounding range, adjusting a force to be applied to the actual element included in the haptic device using the adjusted bounding parameter; applying the adjusted force to the actual element included in the haptic device, and repeatedly performing the detecting of the value of the physical parameter through the applying of the adjusted force at each predetermined time interval. According to the method and system, lowering of a realistic degree which a haptic system pursues is prevented and the haptic system can be stabilized.
REFERENCES:
patent: 7027965 (2006-04-01), Hannaford et al.
patent: 2002/0033841 (2002-03-01), Rosenberg
patent: 2004/0054446 (2004-03-01), Sanpei et al.
Kim Jong-Phil
Ryu Je-Ha
Brook Mitchell P.
Gwangju Institute of Science and Technology
Hjerpe Richard
Luce Forward Hamilton & Scripps
Nguyen Jennifer T
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