Cedrat Technologies

Other

Thales

Francois Barillot

Frank Claeyssen

Christophe Devilliers

Ronan Le Letty

Julien Ducarne

Norbert Beyrard

Félix Aguilar

A nanometer-scale precision actuator comprises a base, an intermediate structure, an output interface, and two linear elements producing a controllable extension in the same longitudinal direction, each between a first and a second end. A first of the two elements has a first end fixed onto the intermediate structure and a second end fixed onto the base, a second of the two elements has a first end fixed onto the intermediate structure and a second end fixed to the output interface. The base and the intermediate structure are positioned in such a manner that the controllable extension of the second element produces a displacement of the actuator in a first direction and the controllable extension of the first element produces a displacement of the actuator in a second direction, opposite to the first direction, with respect to the base.

Precision return actuator

The invention relates to a fine positioning system using an inertial motor based on a mechanical amplifier that comprises a first amplified inertial sub-assembly including a mechanical amplifier, a piezoactive member and a countermass. A second relative drive sub-assembly includes a clamp and a clamped member attached to the first amplified inertial sub-assembly. Asymmetric excitation cycles of the first inertial sub-assembly generate impact forces and movements amplified in a driving direction (z), thus resulting in sliding and adhesion successions of the clamped member in the clamp in order to generate a relative translation movements of the points A and B relative to the point D. The mechanical amplifier increases the step size and reduces the supply inrush currents. Fine and dynamic positioning of the point B relative to the point D can be achieved with augmented strokes using the amplifier.

Fine positioning system using an inertial motor based on a mechanical amplifier

The inventive circuit breaker-contactor () comprises a fixed contact, a contact () movable () with respect to the fixed contact between open and closed positions, means () for displacing the movable contact () in the closed position thereof, means () for displacing the movable contact in the open position. According to said invention, said circuit breaker-contactor comprises means () for locking the movable contact () in the closed position thereof, a piezo-electric actuator () deformable from a rest position to an operating position for displacing the locking means () in such a way that the movable contact () is enabled to be displaced to the open position by the means () for displacing to the open position and an electronic power supply and control unit () for feeding and controlling the piezo-electric actuator () deformation in the operating position for displacing the locking means () in such a way that the movable contact () is unlocked in response to an electric current detected by the fixed contact ().

Circuit breaker-contactor with a piezo-electric controlled locking

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Le Versoud, France

Francois Barillot