The Effect of Kinetic Friction on Lateral Stroking Perception in a Virtual Environment.

Abstract

Objective: This study aims to develop a hybrid handheld tactile device that integrates texture vibration feedback and kinetic friction to enhance lateral stroking tactile discrimination in virtual environments.BackgroundLateral motion is the primary method humans use to explore object textures, involving both normal texture vibration and lateral friction tactile feedback. However, most tactile devices rely solely on vibration-based feedback, limiting their ability to accurately replicate realistic surface textures and friction sensations in virtual environments.MethodA hybrid handheld tactile device was designed to simulate kinetic friction forces during lateral motion by inducing fingerpad skin stretching, while surface texture information was conveyed through vertical vibrations. Two experiments were conducted to evaluate the effectiveness of fingerpad skin stretch in enhancing lateral stroking tactile perception.ResultsFindings indicate that vibration feedback alone was effective for distinguishing textures with large vibration differences but struggled with textures that had similar vibration patterns. The integration of lateral skin stretch significantly improved texture discrimination accuracy, increasing overall perception accuracy from 57.5% to 81.9%. Additionally, participants reported that lateral force feedback enhanced realism, reinforcing its importance in virtual tactile perception.ConclusionThe inclusion of lateral skin stretch improves texture discrimination, making haptic interactions more realistic and perceptually accurate.ApplicationThe proposed hybrid tactile device can enhance virtual reality (VR), augmented reality (AR), and remote haptic interaction systems by providing more realistic tactile feedback. Potential applications include medical simulations, virtual training environments, remote robotic control, and interactive touch-based interfaces, where precise tactile perception is crucial.