A North-finding Method with Single Gyro in Arbitrary Four Positions

Abstract

The invention discloses an arbitrary four-position single gyro north-seeking method, comprising the following steps: installing an inertial device; obtaining static data of the gyroscope and accelerometer in the inertial device at the initial position; synchronously rotating the gyroscope and the accelerometer at a certain angle to obtain the inertial device The static data of the device at this position; the gyroscope and the accelerometer continue to rotate synchronously to a certain angle to obtain the static data of the inertial device at this position; the gyroscope and the accelerometer rotate again synchronously to a certain angle to obtain the static data of the inertial device at this position; The azimuth angle is obtained by substituting the above-obtained mean value of the gyro output and the mean value of the accelerometer output into the unique azimuth angle solving formula. By applying the method of the present invention, the effect is: the present invention can solve the problem that the traditional four-position scheme must have a fixed phase difference or a symmetrical position for data measurement due to the constraints of reducing the rotational position and the number of sensitive elements; the present invention has the advantages of convenient operation and strong reliability. characteristics and a wide range of applications.

Description

technical field [0001] The invention relates to the field of inertial technology, in particular to an arbitrary four-position single gyro north-seeking method. Background technique [0002] Gyro North Finder is a high-precision inertial instrument that can automatically indicate azimuth in all weather under static conditions, and has broad application prospects in military and civilian sectors. [0003] The main function of the gyro north finder is to provide attitude and azimuth reference for the carrier. Most of the current north finders use fiber optic gyroscope and accelerometer as the main sensitive components to achieve north finding. [0004] In the prior art, there are two-position, four-position, multi-position and continuous rotation methods for north-seeking schemes based on indexing. These traditional methods have the following defects: some north-seeking methods require fixed position measurement, such as the traditional four-position rotational orthogonality. ...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a single gyro north-finding method with any four positions, which not only solves the problem that the traditional four-position scheme must have a fixed phase difference or symmetrical positions for data measurement due to the reduction of the constraints of the rotation position and the number of sensitive elements, but also has the advantages of convenient and reliable operation. With strong characteristics, it can be widely used in the accurate orientation of weapon systems such as military missiles and artillery, mine engineering and penetration measurement that require accurate azimuth references and other fields

Images