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Now showing items 1-10 of 32
Design and Performance of a Tactile Shape Display Using RC Servomotors (Short Paper)
(Haptics-e, The electronic journal of haptics research, 2004-08-06)
Tactile displays are used to convey small-scale force and shape information to the fingertip. We describe a 6x6 tactile shape display design that is low in cost and easily constructed. It uses commercially available RC servomotors to actuate an array of mechanical pins. The pins deflect a maximum of 2mm. with a resolution of ...
Human Psychophysics for Teletaction System Design
(Haptics-e, The electronic journal of haptics research, 2000-02-18)
In this paper, we quantify several perceptual capabilities of the human tactile system needed for teletaction. We develop a model of a teletaction system based on predicted subsurface strain. Psychophysics experiments measure the amplitude resolution of the human tactile system, the effects of shear stress on grating orientation ...
Voxel-Based 6-DOF Haptic Rendering Improvements
(Haptics-e, The electronic journal of haptics research, 2006-01-19)
An approach is presented for realizing an order-of-magnitude improvement in spatial accuracy for voxel-based 6-DOF haptics. It trades constant-time performance for greater spatial accuracy. This helps to make 6-DOF haptics applicable to extraordinarily complex real-world task simulations, which often admit no other known ...
A Unified Treatment of Elastostatic Contact Simulation for Real Time Haptics
(Haptics-e, The electronic journal of haptics research, 2001-09-27)
We describe real-time, physically-based simulation algorithms for haptic interaction with elastic objects. Simulation of contact with elastic objects has been a challenge, due to the complexity of physically accurate simulation and the difficulty of constructing useful approximations suitable for real time interaction. We ...
Haptic Exploration and the Perception of Texture Orientations
(Haptics-e, The electronic journal of haptics research, 2006-04-21)
The perceptual sensitivity of touch to orientation differences in adjacent segments of textures with different configurations was measured in two experiments. We found that sensitivity to the orientation difference was not only a function of the magnitude of that difference but of the reference orientation. In Experiment 1, ...
Implementation and Evaluation of a Haptic Playback System
(Haptics-e, The electronic journal of haptics research, 2004-05-03)
This article presents implementation and evaluation of a haptic playback system using the PHANToM haptic inerface, in the context of our Virtual Haptic Back Project at Ohio University. Playback has the potential to improve virtual palpatory diagnosis training by allowing students to follow and feel an expert's motions prior ...
Haptic Warning Signals at the Steering Wheel: A Literature Survey Regarding Lane Departure Warning Systems (Short Paper)
(Haptics-e, The electronic journal of haptics research, 2011-05-13)
Using the haptic modality to transfer information to the driver is recognized as a promising possibility in many in-vehicle applications. In the field of lane departure warning systems, several haptic warning signals were presented in the last years. The application of synthetic steering wheel torque or vibration informs the ...
Kane's Equations for Haptic Display of Multibody Systems
(Haptics-e, The electronic journal of haptics research, 2003-08-18)
The design of a general-purpose multibody simulator that runs in real-time and features haptic display is presented. The repertoire of this simulator includes systems subject to holonomic con-straints, nonholonomic constraints, and notably, systems subject to changing constraints. In contrast to the use of generic equations ...
Closed-Loop Force Control for Haptic Simulation of Virtual Environments
(Haptics-e, The electronic journal of haptics research, 2000-02-23)
This paper investigates the use of force control for improving haptic force feedback used in virtual reality simulations. Advances in control system design will help increase the fidelity of the haptic feedback thus giving operators a more realistic interface for simulation and training. The classic haptic controller with ...
Judging the Orientation of Sinusoidal and Square-Wave Virtual Gratings Presented via 2-DOF and 3-DOF Haptic Interfaces
(Haptics-e, The electronic journal of haptics research, 2000-03-28)
The ability of observers to resolve the orientation of virtual gratings presented on two different haptic interfaces was investigated. Gratings were presented either with the 2-degree-of-freedom Immersion IE2000, or with the 3-degree-of-freedom SensAble Devices PHANToM. Results showed excellent resolution of both sinusoidal ...