Abstract: A piezo-hydraulic linear actuator (1) for controlling the vibrations through a piezoceramic element (7) that acts onto a proper liquid placed inside a cavity (3) (similar to a Helmholtz resonator configuration) by means of a flexible metallic membrane (8). The equipment whose vibrations must be controlled is fastened to a mobile plate (4) placed onto anyone of the cavity walls. The cavitation phenomena can be avoided by using two piezoceramic elements (7,9) acting onto the liquid in phase opposition one with respect the other one. The actuator can be designed to control the vibrations on one, two or three axes.

Abstract: A retaining and heat dissipating structure for electronic equipments installed aboard space, air or land vehicles comprises a ceramic powder (7), possibly mixed with a lightening material (8), placed with a certain degree of compression inside a container housing the printed circuit boards (1) carrying the equipment components (2).

Abstract: A retaining and heat dissipating structure for electronic equipments installed aboard space, air or land vehicles comprises a ceramic powder (7), possibly mixed with a lightening material (8), placed with a certain degree of compression inside a container housing the printed circuit boards (1) carrying the equipment components (2).