Piezoelectric Actuator for a Haptic Application

摘要

As a solution to the lack of compactness and simplicity often encountered in haptic interfaces, we propose a device based on friction coefficient control principle. This device includes polarised piezoceramics well adjusted and glued to a 64×38×3 mm cupper-beryllium plate supported by four legs. Then, properly energised around a resonant frequency, with legs at antinodes, a stationary wave is created in the plate. Variable friction forces between the legs and the plane substrate are created by the control of the wave amplitude, according to electro-active lubrication. So the user obtains haptic feedback by holding the plate, and moving it on a plane substrate, as he could do with a mouse interface. Simulation and experimental results on the resulting friction force show the validity of this approach in a purpose of haptic feedback design.