Automatic latitude measuring and calculating and automatic precision compensating method of pendulum gyro north seeker

A technology of automatic compensation and north finder, which can be used in rotating gyroscopes, surveying and navigation, instruments, etc., and can solve problems such as long calibration time

Active Publication Date: 2013-10-30
PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual measurement, the orientation coefficient is inseparable from instrument parameters such as the earth's rotation angular velocity, geographic latitude, gyro rotor angular momentum, and suspension belt torque coefficient. When performing high-precision measurement, the coefficient needs to be recalibrated at different locations, and the calibration time is longer

Method used

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  • Automatic latitude measuring and calculating and automatic precision compensating method of pendulum gyro north seeker
  • Automatic latitude measuring and calculating and automatic precision compensating method of pendulum gyro north seeker
  • Automatic latitude measuring and calculating and automatic precision compensating method of pendulum gyro north seeker

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Effect test

example 1

[0079] The solution when damping is not considered, the steps are as follows:

[0080] Step 1: Calibrate the relationship coefficient between cycle and latitude:

[0081] by the known no-track period T and geographic latitude at the two calibration locations The constant value coefficients M and N can be obtained by using formula 3:

[0082] (Formula 5)

[0083] in: M = 4 π 2 H mgl ω e , N = D B Hω e .

[0084] The specific process is: assuming that the non-tracking period T of the two calibration locations is known 1 , T 2 and geographic latitude Then there are:

[0085]

[0086] Solutions have ...

example 2

[0105] Example 2: The solution when damping is considered, the specific steps are as follows:

[0106] Step 1: Calibrate the relationship coefficient between cycle and latitude:

[0107] By the known non-tracking period T′ and geographic latitude at the two calibration locations The constant coefficients M and L-N can be obtained by using the non-tracking period under damping:

[0108] (Formula 10)

[0109] in: M = 4 π 2 H mgl ω e , N ′ = D B Hω e - n 2 mgl 4 ...

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Abstract

The invention relates to an automatic latitude measuring and calculating and automatic precision compensating method of a pendulum gyro north seeker. The method is characterized in that the geographic latitude is resolved by utilizing the pendulum period measured by an alidade of the pendulum gyro north seeker under a non-tracking state, and the directive coefficient is calculated, so that the precision compensation of deviation brought about by torsion zero deviating from true north is completed, and the method comprises the four steps of calibrating the relationship coefficient of the period and the latitude, starting a north seeking process, measuring the period under the non-tracking state, resolving the latitude by the non-tracking period, and correcting the torsion zero deviation automatically. Compared with the prior art, the automatic latitude measuring and calculating and automatic precision compensating method of the pendulum gyro north seeker has the advantages that in actual applications, the latitude is not required to be input before measurement, and the directive coefficient is also not required to be calibrated and calculated; through the constant coefficient relationship of the period and the latitude, which is calculated in advance in a calibrating site, the latitude at the site can be resolved only by measuring the non-tracking pendulum period of a measured site, and further a measurement result is corrected. The method can be widely applied to the fields of aviation, aerospace, geodetic measurement, guided missile aiming and the like.

Description

technical field [0001] The invention belongs to the technical fields of geophysics, geodesy and autonomous orientation, and relates to a latitude and precision automatic compensation method for a pendulum gyro north finder. Background technique [0002] Pendulum gyro north finder, as a classic fast measuring device for azimuth reference, is widely used in geodesy, exploration, construction, aviation, aerospace and many other fields. Many north-seeking methods have been proposed based on the motion trajectory of the pendulum gyroscope during the north-seeking process, such as the integral method, the transit method, the time difference method, the reversal point method, etc. The north method is divided into two types: the tracking method and the non-tracking method. The non-tracking method is easy to operate and avoids the error caused by the tracking operation. It is widely used in high-precision north-finding equipment. In the general north-finding method, it is usually ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/02G01C1/00
Inventor 周召发张志利郭晓松常振军
Owner PLA SECOND ARTILLERY ENGINEERING UNIVERSITY
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