Thomson-csf

Electronique Serge Dassault

Louis Beaulieu

Yves Poncel

Daniel Balet

Sylvie Fleury

Renzo Chiomento

A device for the unambiguous measurement of the angle of roll of a projectile, comprises at least a radar equipped with means of processing and sending a signal to the casing of the projectile in at least one direction of incident polarization; a set of parallel grooves made on the casing, the depth of which is modulated dissymmetrically with respect to the axis of symmetry of the projectile; the axis of symmetry of the projectile not passing through the point of the antenna of the radar where the antenna beam is generated, the processing means analyzing, in reception, a signal back-scattered by the casing of the projectile, the signal being modulated as a function of the angle of roll of the projectile, the modulation having two maximum local values corresponding to two angular roll positions of the projectile such that the polarization {overscore (E)} is parallel to the grooves, the processing means removing the 180&deg; ambiguity by comparing the levels of the local maximum values. The device can be applied especially to the correction of the paths of projectiles fired by a gun and when the correction requires knowledge of the roll position of the projectiles.

Device for the unambiguous measurement of the roll of a projectile and application to the correction of the path of a projectile

The present invention relates to a device (1) for positioning a mock-up (2). The device comprises supports (3, 4) suitable for holding the mock-up in a variable position which is controllable in attitude and/or altitude relative to an illumination axis (I-I'). The mock-up is held by two pairs of top wires (6) and by two pairs of bottom wires (7). These four pairs of wires are mounted at their opposite ends on tensioning means (8) fixed to the opposite ends of the supports (3, 4) and intended to adjust the tensions and the lengths of the wires as a function of a desired attitude and/or a desired altitude for the mock-up. The device also includes control means (9) for controlling the angular positions of the supports (3, 4), and cameras connected to processor means for measuring the real position and attitude of the mock-up.

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Guyancourt, France

Louis Beaulieu