接平面近似円筒面の力覚補間呈示における「なめらかさ」(<特集>VR空間における心理学)

概要

論文の詳細を見る
Haptic/force feedback device is an important three-dimensional haptic display whose application fields include computer aided design (CAD). For CAD applications, smooth interpolation of polygonized surfaces with "force shading" technique is very useful for maintaining high haptic-rendering refresh rates by reducing the cost associated with computing the exact collision point of the cursor and the object. The resolution requirement of such polygonization, defined by human sensory thresholds, is unknown. We have conducted experiments to measure the human absolute threshold values on smoothness of cylindrical surfaces approximated by tangent planes, which are interpolated in different ways. Two kinds of PHANToMs of different positional resolution (0.03mm and 0.07mm) were used as force feedback devices and cylindrical surfaces of radius 30 - 120 mm have been investigated. The results have shown that, (1) when reaction force direction is force-shaded, the absolute threshold is mainly defined by the maximum difference between the polygonal approximation and the true surface and stiffness, and (2) positional resolution of the equipment does not affect the threshold values significantly.
日本バーチャルリアリティ学会の論文
2001-03-31