Data underlying the publication - Sliding Speed Influences Electrovibration-Induced Finger Friction Dynamics on Touchscreens

This study investigates how exploration conditions affect electrovibration-induced finger friction on touchscreens and the role of skin mechanics. Ten participants slid their index fingers across an electrovibration-enabled touchscreen at five speeds ($20\sim100$~mm/s) and force levels ($0.2\sim0.6$~N). Contact forces and skin accelerations were measured while applying amplitude-modulated voltage signals spanning the tactile frequency range. The finger-display interaction was modeled as a first-order system and the skin mechanics as a mass-spring-damper system. Results showed that higher sliding speeds increased the cutoff frequency of the interaction response, likely due to higher finger stiffness. Inter-participant variability affected the model parameters of both responses. Based on these findings, a speed-dependent friction model was developed to deliver consistent electrovibration stimuli across varying exploratory conditions.

本研究探讨了触控探索条件如何影响触摸屏上电致振动诱导的手指摩擦力，以及皮肤力学的作用。10名参与者以5种滑动速度（20~100 mm/s）与5种按压力度（0.2~0.6 N），在搭载电致振动功能的触摸屏上滑动食指。实验过程中，在覆盖触觉频率范围的调幅电压信号施加条件下，采集接触力与皮肤加速度数据。本研究将手指-显示屏的交互作用建模为一阶系统，将皮肤力学特性建模为质量-弹簧-阻尼系统。结果表明，更高的滑动速度会提升交互响应的截止频率，这一现象大概率源于手指刚度的提升。参与者间的个体差异会影响两种响应的模型参数。基于上述研究结果，本研究开发了一种速度相关的摩擦力模型，可在不同触控探索条件下输出一致的电致振动刺激。