Method for measuring initial attitude of high-speed rotating projectile body at muzzle

Abstract

The invention relates to a technique for measuring an initial attitude of a high-speed rotating projectile body at a muzzle, in particular to a method for measuring the initial attitude of the high-speed rotating projectile body at the muzzle based on a three-axis micro electro mechanical system (MEMS) accelerator and two nonorthogonal distributed MEMS gyroscopes to solve the problem of accurately measuring the high-speed rotating projectile body with high axial overload and high angular speed. The method for measuring the initial attitude of the high-speed rotating projectile body at the muzzle comprises the following steps: (I) establishing a cannon emission coordinate system as a reference coordinate system, setting an emission point of the projectile body in a barrel as an original point of the reference coordinate system, and arranging the barrel in an XnOYn plane of the reference coordinate system; establishing a projectile body coordinate system, setting a projectile body core as an original point of the projectile body coordinate system, and enabling an axis to be along the axial direction of the projectile body; and in the whole process of emitting the projectile body to the muzzle, ensuring that the yaw angle of the projectile body is zero and the pitch angle is not changed. The design is reasonable, and the measurement problem that the range and the accuracy are conflicted when the axis angular rate of the projectile body is measured is solved through the two high-precision small-range gyroscopes.

Description

technical field [0001] The invention relates to a technology for measuring the initial attitude of a muzzle of a high-speed rotating projectile, in particular to a method for measuring the initial attitude of a muzzle of a high-speed rotating projectile based on a three-axis MEMS accelerometer and two non-orthogonal MEMS gyroscopes. Background technique [0002] Guidance and dexterity transformation of conventional ammunition is the development direction of precision strike weapons at home and abroad. Real-time accurate measurement of the attitude angle of the projectile during flight is the key premise to realize its precise control of flight. Limited by the high-speed rotation, high impact, and small size of conventional ammunition, the selected navigation system must meet the requirements of high overload resistance, small size, appropriate range and accuracy, and low cost. Especially for high-speed rotating projectiles with a rotation speed of 30 revolutions per second, ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high-precision measurement of high axial overload and high angular velocity of high-speed rotating projectiles, the present invention provides a measurement method suitable for the initial attitude of the muzzle of high-speed rotating projectiles

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