High-dynamic attitude measurement method of guided projectiles

Abstract

The invention discloses a high-dynamic attitude measurement method of guided projectiles. The method can effectively and accurately measure the attitude information of high-overload and high-rotationguided projectiles. In the invention, an IMU, which is composed of three high-overload angular angle gyros, and a three-axis magneto-resistive sensor are mounted on a projectile; when the projectile is ejected from a muzzle, firstly, average value of output signal frequencies of the three-axis magneto-resistive sensor is employed as the roll angle rate of the present projectile; and when the rollangle rate, measured by the magneto-resistive sensor, of the projectile is less than or equal to 10 r / s, on the basis of the roll angle rate, measured by the IMU, of the projectile, the roll angle rate, which is acquired by the magneto-resistive sensor, is calibrated by the roll angle rate, acquired by the magneto-resistive sensor; and then the calibrated roll angle rate is employed as the roll angle rate of the present projectile; and then by means of the roll angle rate of the present projectile, pitch angle rate, measured by the IMU, of the projectile, and yaw angle of the projectile, the attitude of the present projectile is obtained with combination of strapdown inertial navigation attitude algorithm.

Description

Technical field [0001] The invention relates to the technical field of high dynamic attitude measurement, in particular to a high dynamic attitude measurement method for guided projectiles. Background technique [0002] The guidance of conventional artillery shells can significantly improve the strike accuracy and overall combat effectiveness of artillery shells, making it more suitable for future information warfare. Accurate measurement of projectile attitude is the basis for precise guidance and control, and it is also a current difficult problem. [0003] Currently commonly used attitude measurement methods, such as full accelerometer measurement method, GPS-based attitude measurement method, full magnetoresistive sensor combined measurement method, and inertial measurement combined method, have limitations, which are mainly reflected in the high overload (≥12000g) and High rotation (≥10r / s) gun shooting environment adaptability. Using the full accelerometer to measure the at...

AI Technical Summary

Problems solved by technology

However, since the roll angular rate (speed) of the ejected muzzle of the guided gun is greater than 10r / s, which exceeds the measurement range of the high overload angular rate gyro, the attitude measurement of the highly dynamic guided projectile cannot be completed by using the high overload angular rate gyro

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