Piezoactive actuator with dampened amplified movement

Details Piezoactive actuator with dampened amplified movement Piezoactive actuator with dampened amplified movement

2005-08-09

2005-08-09

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S328000

Reexamination Certificate

active

06927528

ABSTRACT:
The piezoactive actuator with amplified movement comprises a first sub-assembly formed by a mechanical movement amplifier and a second sub-assembly equipped with piezoactive elements. An interface with a load and an interface with a base, respectively placed at the peaks of a small axis of the shell and designed for actuating the load with respect to the base, define an actuating axis. A longitudinal deformation of the large axis enables a deformation of the small axis to be induced, designed to generate a movement at the interface with the load, the component of which movement along the small axis is amplified. At least one zone made of elastomer material is arranged at least substantially along the actuating axis to dampen deformations and increase the capacity of the actuator to resist external stresses. The actuator comprises at least one free space adjacent to the elastomer material zones in a direction orthogonal to the actuating axis.

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Le Letty et al., “A New Amplified Piezoelectric Actuator for Precise Positioning and Active Damping,” SPIE, vol. 3041, pp. 496-504, 1997.

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