초록

A process for piloting and guiding a projectile in the terminal phase in which the correction is obtained by means of a barrel of (n) impellers

대표청구항 ▼

A method for correcting the terminal portion of the ballistic trajectory of a rotating projectile directed toward a target; said projectile having a barrel of impeller each provided with at least one lateral nozzle equally spaced around the circumference of the projectile body and an optical sensor

A method for correcting the terminal portion of the ballistic trajectory of a rotating projectile directed toward a target; said projectile having a barrel of impeller each provided with at least one lateral nozzle equally spaced around the circumference of the projectile body and an optical sensor located within the nose section, said method comprising the steps of: (a) measuring the period of rotation T of the projectile about its longitudinal axis (A-B); (b) detecting the optical image (C1) of the target (C) on the successive rotations of the projectile; (c) measuring the polar coordinate (Pi) of this image of the target at least once during the period of rotation of the projectile; (d) calculating the magnitude of the rate of change of the successive polar coordinate measurements; (e) comparing this calculated magnitude to a predetermined threshold value S1; (f) measuring the instant of time Td when the calculated magnitude rate exceeds the threshold value; (g) triggering of a first impeller at time Td, and then sequentially after a given delay a second, third and finally nth impeller in relation to the measured period of rotation of the projectile so that the mean thrust of all the impellers is in the same direction to correct said terminal portion of trajectory. A projectile rotating around its longitudinal axis (A-B) and having a barrel of n impellers equally spaced around the circumference of the projectile for generating an orientable lateral thrust P, and an optoelectronic sensor located within its nose-section, said optoelectronic sensor comprising: (a) a clock source; (b) a first electronic means for calculating the period of rotation T of the projectile; (c) at least a linear array of optical detector cells extending radially from the longitudinal axis of the projectile, this detector array being located in the image plane of the lens; (d) a second electronic means for detecting the polar coordinate (rth impeller so that the mean thrust of all the impellers is in the same direction to correct said terminal portion of tragectory.