Coupling of ultrasonic vibration and electrovibration for tactile stimulation

Electrovibration and squeeze film effect are two different principles, which modify the user's perception of a surface. The first one is generated by the polarization of a finger approaching a high voltage supplied plate, and the latter by the ultrasonic vibration of a plate. Their compatibility on the same stimulator will be presented in this paper and their concomitant use will be proven. A parametric study on electrovibration in function of the material choice and a first experimental investigation of the validity of the squeeze film effect hypothesis are performed. A description of the physical principle and the characteristics of each effect will be proposed and force measurements of their coupling will be presented. © Lavoisier 2014.