A Fast Coarse Alignment Method for Rotating Projectiles in Air Based on Kinematic Equations

Abstract

The present invention provides a method for rapid and rough alignment of a rotating bomb in the air based on kinematic equations, comprising the following steps: obtaining the carrier position and speed at the alignment time given by the Beidou satellite navigation system; further obtaining the carrier pitch angle at the alignment time through the speed information , heading angle information; obtain the rotation angular rate of the navigation coordinate system relative to the inertial coordinate system at the time of alignment through the position information, and obtain the initial algorithm of roll angle alignment at the time of alignment through the kinematics equation; obtain the pitch angle at the time of alignment obtained through the preceding steps , heading angle information, and obtain the compensation item M; compensate M into the initial roll angle alignment algorithm to obtain a more accurate roll angle alignment result, so as to realize the initial position, speed, and attitude information required for the aerial alignment of the rotating bomb; the Compared with other roll angle alignment algorithms, the alignment algorithm compensates the influence of the earth's rotation on the alignment, and the algorithm is simple and the alignment speed is fast, which makes an important preparation for the subsequent integrated navigation part.

Description

technical field [0001] The invention relates to the field of high dynamic initial alignment and combined navigation of a rotary projectile, in particular to a method for rapid and rough alignment of a rotary projectile in the air based on kinematics equations. Background technique [0002] Precision strike is the key pursuit of modern warfare. With the rapid development of electronic information technology in the 21st century, low-cost conventional munitions at home and abroad have put forward guidance and informatization requirements to ensure the effectiveness and accuracy of fire coverage in modern warfare. For projectiles, the spin regime can simplify the composition of the control system and reduce the influence of structural asymmetry, thereby improving the performance of the projectile. [0003] While high-speed spin brings many advantages, it also brings unique difficulties to the study of guided weapons of the rotating system. The first is the high overload at the...

AI Technical Summary

Problems solved by technology

However, after the rotary projectile is launched, it has a fast rate of fire, short flight time in the air, and there are still difficulties such as high spin and high overload, so it is necessary to use BDS (Beidou Satellite Navigation System) to assist in completing the air alignment

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