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Closed-Loop Control for Squeeze Film Effect in Tactile Stimulator

Archive ouverte : Communication dans un congrès

Ben Messaoud, Wael | Lemaire-Semail, Betty | Bueno, Marie-Ange | Amberg, Michel | Giraud, Frédéric

Edité par HAL CCSD

International audience. This paper presents a method for controlling the vibration amplitude of a tactile stimulator used to give the sensation to the fingertip that it touches a texture. The active surface of the stimulator is excited by an ultrasonic vibration frequency in order to modulate the friction coefficient with the fingertip. Due to the large size of the tactile display, two types of perturbations may affect the vibration amplitude which are the finger pressure and the temperature variation. We tackle these problems by coupling the control of the vibration amplitude and the tracking of the resonance frequency. This work is validated by plotting the vibration amplitude response with closed loop control and with a psychophysical test.

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