초록 ▼

A method for correcting a pre-programmed time of disaggregation of a spin-stabilized projectile. For this purpose the deviation of the actual muzzle velocity from the theoretical muzzle velocity is taken into consideration. The actual muzzle velocity is determined with the aid of the effects of a ma

A method for correcting a pre-programmed time of disaggregation of a spin-stabilized projectile. For this purpose the deviation of the actual muzzle velocity from the theoretical muzzle velocity is taken into consideration. The actual muzzle velocity is determined with the aid of the effects of a magnetic field on the projectile indirectly by means of the actual rotation frequency of the projectile, wherein the actual rotation frequency of the projectile is determined during a time-limited calibration phase directly following the firing of the projectile. The device for executing this method includes means for storing the time of initiation, programmed on the basis of the theoretical rotation frequency of the projectile, means for determining the actual rotation frequency of the projectile, and means for correcting, or respectively updating of the theoretical time of initiation toward the actual time of initiation on the basis of the actual rotation frequency, or respectively muzzle velocity of the projectile. The employment of the device is intended to increase the effectiveness of a weapons system for attacking targets by means of fuse-time-fixed projectiles.

대표청구항 ▼

1. A method for correction of event timing of an event (TP) in a spin-stabilized projectile fired from a muzzle, the method includingmeasuring an actual rotation frequency of the projectile by rotation of the projectile in a magnetic field, calculating an actual muzzle velocity from the measured act

1. A method for correction of event timing of an event (TP) in a spin-stabilized projectile fired from a muzzle, the method includingmeasuring an actual rotation frequency of the projectile by rotation of the projectile in a magnetic field, calculating an actual muzzle velocity from the measured actual rotation frequency of the projectile, and calculating the correction of the event timing as a function of a deviation between of the actual muzzle velocity and a theoretical muzzle velocity; wherein the improvement comprises: calculating a chronologically-limited calibration interval, the calibration interval directly following firing of the projectile, said step of calculating the calibration interval comprising minimizing an overall error function; taking a measurement of the actual rotation frequency during the calibration interval; and calculating the correction of the event based on the measurement during the calibration interval, wherein the step of minimizing an overall error function comprises: determining a first relative error of a measurement method for measuring the actual rotation frequency of the projectile, wherein the first relative error is a function of a number of projectile rotations; determining a second relative error in a distance traveled by the projectile during the calibration interval, wherein the second relative error is a function of the number of projectile rotations; summing the first relative error and the second relative error to form an overall relative error (.epsilon.); minimizing the overall relative error by differentiating the overall relative error, with respect to the number of projectile rotations, to obtain a first derivative of the overall relative error, setting the first derivative equal to zero, and solving to obtain an optimum number of projectile rotations (Ropt); and setting the calibration interval to include at least approximately the optimum number of rotations.