Method for improving precision of gyroscope based on Allan variance and random polynomial

A gyroscope and polynomial technology, applied in the field of improving the accuracy of gyroscopes, can solve problems such as unstable convergence effect, and achieve the effects of reducing the amount of calculation, good versatility and improving accuracy

Active Publication Date: 2021-05-04
CHINA CONSTR EIGHTH ENG DIV
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Problems solved by technology

In practical engineering applications, deterministic errors in the prior art can be compensated by calibration, while random errors are usually obtained through the random error model to obtain the random error output information of the gyroscope, but the existing random error models require a lot of calculations to obtain converged results , and the convergence effect is unstable

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  • Method for improving precision of gyroscope based on Allan variance and random polynomial
  • Method for improving precision of gyroscope based on Allan variance and random polynomial
  • Method for improving precision of gyroscope based on Allan variance and random polynomial

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[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0037] The present invention provides a method for improving the accuracy of a gyroscope based on Allan variance and random polynomials, uses Allan variance analysis to identify the noise source that affects the random error of the gyroscope in the angular rate data output by the gyroscope in a static environment, and establishes a random error model of the gyroscope,

[0038] Use random polynomials to approximate the random error model of the gyroscope, transform the random error model of the gyroscope into a differential equation with determined random polynomial coefficients, obtain the coefficients of the random polynomial at each moment by solving the differential equation, and...

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Abstract

The invention discloses a method for improving precision of a gyroscope based on an Allan variance and a random polynomial, and relates to the technical field of instrument precision improvement. The method comprises the following steps of processing angular rate data through an Allan variance method, identifying a noise source which is contained in the data and affects a gyroscope random error, establishing a gyroscope random error model, approaching the gyroscope random error model by utilizing a random polynomial, converting the gyroscope random error model into a differential equation of a determined random polynomial coefficient, solving the differential equation to obtain a coefficient of the random polynomial at each moment, calculating statistical information of an output signal of the gyroscope, further analyzing to obtain error precision of a random error of the gyroscope, and compensating the random error of the gyroscope according to the error precision. According to the invention, a random problem is converted into a deterministic problem; and the precision of the gyroscope is rapidly and effectively improved, the calculation amount is reduced, the calculation time is shortened, meanwhile, the universality is good, and a wide application value is achieved.

Description

technical field [0001] The invention discloses a method for improving the precision of a gyroscope, and relates to the technical field of improving the precision of an instrument, in particular a method for improving the precision of a gyroscope based on Allan variance and random polynomials. Background technique [0002] The gyroscope is a widely used high-precision inertial sensitive element and one of the essential core components in the inertial navigation system. Its measurement accuracy directly determines the performance of the inertial navigation system. Gyroscope errors mainly include deterministic errors and random errors, among which deterministic errors mainly include installation errors, zero bias errors and scale factor errors, etc., which have certain regularity. Therefore, for the deterministic error, the error calibration can be carried out through the gyroscope test and the high-precision rate turntable, and then the online real-time error compensation can ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 殷利建魏飞龙王鹏飞殷利庆刘世涛李昌龙
Owner CHINA CONSTR EIGHTH ENG DIV
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