In-flight programming of trigger time of a projectile

Details In-flight programming of trigger time of a projectile In-flight programming of trigger time of a projectile

F - Mech Eng,Light,Heat,Weapons

42

C

F42C 15/42 (2006.01) F42C 11/00 (2006.01) F42C 11/06 (2006.01) F42C 15/40 (2006.01) F42C 17/00 (2006.01) F42C 17/04 (2006.01)

Patent

CA 2715880

The present invention describes methods for programming trigger time of a projectile (60) based on remaining flight time to a target (P) after the projectile (60) is airborne. The actual muzzle (Vo) and flight speeds (V1, V2, etc.) are indepen-dently determined and compared to those used by the ballistic computer (30), and a better estimate of trigger time is accordingly used to activate detonation of the projectile (60). In one embodiment, a Kalman algorithm is used to provide a better estimate of the projectile's flight speeds obtained by independent methods to provide the better estimate of the trigger time.

Linvention concerne des procédés de programmation de linstant de déclenchement dun projectile (60) en fonction du temps de vol restant jusquà une cible (P) suite au lancement du projectile (60). La vitesse initiale (Vo) et les vitesses de vol (Vl, V2, etc.) effectives sont déterminées et comparées de façon indépendante aux vitesses utilisées par un calculateur balistique (30), et une estimation plus précise de linstant de déclenchement est alors utilisée pour activer la détonation du projectile (60). Selon un mode de réalisation, un algorithme de Kalman est utilisé pour obtenir une estimation plus précise des vitesses de vol du projectile calculées par des procédés indépendants, et donc lestimation plus précise de linstant de déclenchement.

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