Spinning projectile attitude angle computing method based on state observer

Abstract

The invention discloses a spinning projectile attitude angle computing method based on a state observer. The spinning projectile attitude angle computing method based on the state observer comprises the steps that the angular speed of a spinning projectile relative to a navigation coordinate system at the current time is obtained, and components of the angular speed on all axes of a projectile body coordinate system are determined; the roll angle correction component, the roll angle measurement component, the pitch angle and the yaw angle of the spinning projectile at the current time are obtained; an attitude angle updating matrix is built by utilization of the components of the angular speed, the roll angle correction component, the roll angle measurement component, the pitch angle and the yaw angle; a feedback gain matrix is computed by utilizing the attitude angle updating matrix; and according to the attitude angle updating matrix, the feedback gain matrix and the attitude angle of the spinning projectile at the current time, the attitude angle of the spinning projectile at the next time is computed. The spinning projectile attitude angle computing method based on the state observer can achieve real-time alignment of the high-speed spinning projectile in air and improve the hit precision of the high-speed spinning projectile.

Description

technical field [0001] The invention relates to a real-time mid-air alignment technology of a high-speed rotating projectile, in particular to a method for calculating the attitude angle of a rotating projectile based on a state observer. Background technique [0002] High-speed rotating bomb is a kind of rocket-like aircraft that rotates continuously around its longitudinal axis at high speed during flight, and is widely used in various tactical and strategic missiles. The high-speed rotating projectile generates gyro torque through high-speed rotating motion, thereby weakening the harmful effects of mass eccentricity, thrust eccentricity, and aerodynamic and structural asymmetry caused by processing, ensuring the flight stability of the aircraft and enabling the system to have higher The anti-interference ability is conducive to improving the accuracy of the weapon system's landing point, and at the same time can effectively weaken the strike of laser interception weapons ...

AI Technical Summary

Problems solved by technology

For example, if the GPS external measurement period is 0.1 seconds, and the rotation speed of the high-speed rotating bomb is greater than 1500° / s, it cannot meet the signal reproduction requirements and cause estimation errors

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