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Method for measuring rotating attitude of flying projectile body based on geomagnetic elements

A technology of geomagnetic elements and measurement methods, applied in ground navigation, navigation calculation tools, etc., can solve the problem of inability to realize the roll angle of flying projectiles

Active Publication Date: 2020-04-10
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The research and implementation of this scheme can effectively solve the problem that the 3-axis magnetoresistive sensor scheme cannot realize the independent calculation of the roll angle, deflection angle and pitch angle of the flying projectile.

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  • Method for measuring rotating attitude of flying projectile body based on geomagnetic elements
  • Method for measuring rotating attitude of flying projectile body based on geomagnetic elements
  • Method for measuring rotating attitude of flying projectile body based on geomagnetic elements

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Embodiment Construction

[0063] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0064] geomagnetic field is a vector. In order to express the magnetic induction intensity and direction of the geomagnetic field at a certain point on the earth, a coordinate system is generally established with the observation point as the origin, and three coordinates are used to describe the geomagnetic field at this point. Adopt rectangular coordinate system in the present invention, as figure 1 shown. O is the observation point, the x' axis points to the north, the y' axis points to the east, and the z' axis points down. figure 1 middle is the total magnetic induction intensity vector of the geomagnetic field at point O, The projections on the x', y' and z' axes are X', Y' and Z' respectively. H is Projection on the horizontal plane. The angle D at which the horizontal intensity vector H deviates fro...

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Abstract

The invention discloses a method for measuring the rotating attitude of a flying projectile body based on geomagnetic elements. The method comprises the following steps: 1) solving the multi-value problem of By according to the mathematical characteristics of Bz; 2) solving a reference angle phi 0; 3) solving a rolling angle phi i; 4) solving the multi-value problem of the pitch angle theta according to the positive and negative values of By; and 5) iteratively correcting the tracking yaw angle psi. The method can effectively solve the problems that a three-axis magnetoresistive sensor schemecannot independently solve the roll angle, the deviation angle and the pitch angle of the flying projectile body, and the like. The successful development of the method lays a solid foundation for thedevelopment of high-precision magnetic survey guided weapons.

Description

technical field [0001] The invention belongs to the technical field of guidance and control, and relates to a method for measuring the rotational attitude of a flying projectile based on geomagnetic elements. Background technique [0002] The attitude measurement of guidance and control technology mainly relies on various "inertial measurement combination methods", which are suitable for strategic large-scale weapons (such as intercontinental missiles, cruise missiles, etc.), and for low-cost, high-strength, small-volume, high-launch overload body weapons , these scenarios are not suitable. In recent years, the guidance method using geophysical characteristics has attracted the attention of scholars at home and abroad. With the continuous emergence of high-precision geomagnetic sensors, and many countries, including China, regularly establish and draw their own geomagnetic models and maps, including high-precision local geomagnetic models and maps, these make the realizatio...

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Application Information

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IPC IPC(8): G01C21/08G01C21/20
CPCG01C21/08G01C21/20
Inventor 易文俊王添奕熊天红柳文安冯波李岩王唯
Owner NANJING UNIV OF SCI & TECH
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