Abstract: A dual guidance gyroscopic actuator comprises, a main structure connected to a platform, connected to a satellite, a ring, a U-shaped cradle, having first and second ends and a central part, a flywheel mounted on the central part between the first and second ends, being rotationally mobile with respect to the cradle about a first axis. A first bearing is positioned at the first end and a second bearing is positioned at the second end connecting the ring to the cradle, the first and second bearings rendering the cradle rotationally mobile with respect to the ring about a second axis substantially perpendicular to the first axis. The ring is connected to the main structure. The gyroscopic actuator comprises at least one suspension element limiting microvibrations from the cradle and flywheel and at least one end-stop element limiting travel cradle and of the flywheel with respect to the main structure.

Abstract: An active space telescope intended to be mounted on a satellite and comprising at least one mirror, a mechanism for servo-controlling the mirror according to at least three degrees of freedom which comprises actuators and a support fixed to the actuators, an interface for fixing the mirror to the servo-control mechanism. The interface is a suspension system of predetermined stiffness which allows dynamic displacements of the mirror relative to the servo-control mechanism, and the telescope comprises means for limiting these dynamic displacements in the form of elastic abutments and means of cooperation with these elastic abutments.

Abstract: An active space telescope intended to be mounted on a satellite and comprising at least one mirror, a mechanism for servo-controlling the mirror according to at least three degrees of freedom which comprises actuators and a support fixed to the actuators, an interface for fixing the mirror to the servo-control mechanism. The interface is a suspension system of predetermined stiffness which allows dynamic displacements of the mirror relative to the servo-control mechanism, and the telescope comprises means for limiting these dynamic displacements in the form of elastic abutments and means of cooperation with these elastic abutments.