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Smooth Vibrotactile Flow Generation Using Two Piezoelectric Actuators

机译：使用两个压电执行器产生平滑的触觉流动

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摘要

This paper proposes a method for generating a smooth directional vibrotactile flow on a thin plate. While actuating two piezoelectric actuators spatially across the plate, temporal sweeping of the input excitation frequency from zero to the first mode of the resonance frequency can smooth the perceived directional vibrotactile flow, as compared to a vibrotactile flow generated by conventional apparent tactile movement and phantom sensation methods. In order to ascertain important factors in the excitation pattern, a user study was conducted for three factors (amplitude (constant versus modulated), frequency (constant versus swept), and ending shape (sharp versus smooth)). The results showed that frequency sweeping in addition to amplitude modulation and smooth ending were the most important factors in smoothing vibrotactile flows. Moreover, an excitation signal with a smooth ending shape was important for generating nonspiky flows at the midpoint. In this study, a vibration isolation design is also proposed in order to substantially decrease the transmission of the actuator vibration to the mockup housing. As such, it is expected that the proposed vibrotactile flow generation method and vibration isolation design may be useful in applications including generating directional information in navigation maps or for identifying callers in mobile devices.
机译：本文提出了一种在薄板上产生平滑的定向触觉流的方法。在空间上驱动整个板上的两个压电致动器时，与传统的明显的触觉运动和幻觉产生的触觉流相比，输入激励频率从零到共振频率的第一模态的时间扫描可以平滑感知的定向触觉流。方法。为了确定激励模式中的重要因素，对三个因素（幅度（恒定与调制），频率（恒定与扫频）和最终形状（锐利与平滑））进行了用户研究。结果表明，除振幅调制和平滑结束外，扫频也是平滑触觉流的最重要因素。此外，具有平滑端部形状的激励信号对于在中点生成非尖峰流很重要。在这项研究中，还提出了一种隔振设计，以充分减少致动器振动向样机壳体的传递。这样，可以预期，所提出的触觉流产生方法和振动隔离设计在包括在导航地图中产生方向信息或用于识别移动设备中的呼叫者的应用中可能是有用的。

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