Title :
Rate-hardness: a new performance metric for haptic interfaces
Author :
Lawrence, Dale A. ; Pao, Lucy Y. ; Dougherty, Anne M. ; Salada, Mark A. ; Pavlou, Yiannis
Author_Institution :
Dept. of Aerosp. Eng. Sci., Colorado Univ., Boulder, CO, USA
fDate :
8/1/2000 12:00:00 AM
Abstract :
Rate-hardness is introduced as a quality metric for hard virtual surfaces, and linked to human perception of hardness via a psychophysical study. A 3 degree-of-freedom haptic interface is used to present pairs of virtual walls to users for side-by-side comparison, 19 subjects are tested in a series of three blocks of trials, where different virtual walls are presented in randomly ordered pairs. Results strongly support the use of rate-hardness, as opposed to mechanical stiffness, as the more relevant metric for haptic interface performance in rendering hard virtual surfaces. It is also shown that common techniques of enhancing stability of the rendered surfaces tend to actually enhance performance as measured by rate-hardness
Keywords :
haptic interfaces; rendering (computer graphics); telerobotics; hard virtual surfaces; performance metric; quality metric; rate-hardness; rendered surfaces; side-by-side comparison; virtual walls; Actuators; Force measurement; Force sensors; Haptic interfaces; Humans; Psychology; Rendering (computer graphics); Stability; Testing; User interfaces;
Journal_Title :
Robotics and Automation, IEEE Transactions on