Method and device for correcting the trajectory of a spin-stabilised projectile
AssigneeBofors Weapon Systems AB
InventorsKjell Albrektsson, Torsten Wik, Ulf Hellman
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Abstract
The present invention relates to a method and a device for correcting the trajectory (7, 8, 10, 11) of a spin-stabilised projectile (12) in azimuth by controlling its rate of spin by devices (18-21) deployable on the outside of the projectile (12) where they act on the airflow.
Claims10
A method for lateral correction of a point of impact of spin-stabilised projectiles (12) wherein the difference in azimuth for each projectile between the predicted impact point computed from current data for the projectile at a checkpoint (8) compared with its firing data in the form of muzzle velocity, training in traverse and elevation when fired and the desired point of impact (9) is corrected by influencing and controlling the rate of spin of the projectile.
A device for lateral correction of the point of impact in a target (2) for a spin-stabilised projectile (12) comprising devices for firing the projectile in a known theoretical trajectory (6) with known muzzle velocity, elevation and traverse, as well as devices for measuring the position of the target (2) and for input of relevant data for the projectile (12) at a minimum of one predetermined checkpoint in the trajectory (7) together with a device for transmitting actuation commands to the projectile (12) in question and a device for receiving the actuation commands wherein the forward section of the projectile (12) incorporates devices (18-21 )protrudable when the receiving device receives the actuation commands and which devices (18-21) when protruding affect the rate of spin of the projectile (12).
Dependencies are inferred from the claim text.