METHOD OF CORRECTION OF HITTING TRAJECTORY OF ARTILLERY PROJECTILE Russian patent published in 2019 - IPC F41G9/00 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to barrel artillery ammunition and can be used in detonators of artillery projectiles to correct trajectory of their movement. Method of correcting trajectory of artillery projectile comprises the fact that prior to firing in computing device of head detonating fuse an algorithm is introduced to determine design value of switching on time of braking device of projectile t_pi. A series of initial data relating to parameters of the gun, shell parameters and gun guidance parameters is entered, namely: design distance L_p, when projectile achieves this distance formation of control pulse, length of rifling pitch in barrel of artillery weapon l, angle of gun height during firing α, dimensionless aerodynamic drag coefficient C_D(M), projectile weight P. A shot is fired. Projectile flight time t is continuously recorded. By means of the pressure sensor installed in the detonating fuse the atmosphere pressure in the projectile flight zone is continuously recorded. Information from the pressure sensor is introduced into the fuse computing device as a function of time t. Using a fuse computer, two time values t_P1i and t_P2i (t_P1i<<t_P2i) are chosen, at which values of registered pressures coincide. Using the relation T_mi=(t_P1i+t_P2i)/2 define time corresponding to maximum flight height of projectile T_mi. By means of technical devices installed in fuse projectile in upper point of trajectory of projectile flight (at time T_mi), projectile speed around its axis N_i is measured. Based on the data entered into the projectile computing device before the shot and the measured values according to the predetermined algorithm using the fuse computing device, calculating the value t_pi using the following ratio: t_pi=T_mi+({L_p-[V_0i²sin2α/2g(k_iV_0isinα+1)]}/V_0icosα e^{- g ki Tmi}), where V_0i=N_il, k_i – coefficient, which is calculated by fuse computer using ratio k_i≅(-2P/V_0iρ_iQcosαC_D(M)+{[(2P/V_0iρ_iQcosαC_D(M)]² +8Psinα/ρ_iQsinαC_D(M)}^1/2)/4Psinα/ρ_iQcosαC_D(M).

EFFECT: high accuracy of determining actuation time.

1 cl, 1 dwg