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
CN112747773AActive Publication Date: 2021-05-04CHINA CONSTR EIGHTH ENG DIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA CONSTR EIGHTH ENG DIV
Publication Date
2021-05-04

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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.
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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 ...

Claims

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