Installation error compensation method for harmonic oscillator and external base of hemispherical resonant gyroscope (HRG)

Abstract

The invention provides an installation error compensation method for a harmonic oscillator and an external base of a hemispherical resonant gyroscope (HRG) and relates to the technical field of inertia. The invention aims to improve the output precision of the hemispherical resonant gyroscope. The method comprises the following steps: calculating an installation error vector according to the installation error between the harmonic oscillator and the external base; calculating the variable quantity of an excitation capacitance between the harmonic oscillator and the external base according to the vibration displacement relationship and the installation error vector of the harmonic oscillator; calculating an excitation coefficient and an excitation amplitude after change according to a relational expression between the variable quantity of the excitation capacitance and the excitation coefficient; according to a gyroscope output error model, calculating the gyroscope output error and performing error compensation. By the application of the installation error compensation method provided by the invention, the influence of the installation error between the harmonic oscillator and theexternal base on the gyroscope output accuracy can be quantitatively analyzed; according to the gyroscope output accuracy, the output of the hemispherical resonant gyroscope is compensated, so that the output accuracy of the hemispherical resonant gyroscope is improved.

Description

technical field [0001] The invention relates to the technical field of inertia, in particular to a method for processing and manufacturing a hemispherical resonant gyroscope and calculating and compensating output errors. Background technique [0002] Hemispherical Resonant Gyroscope (HRG) is a new type of inertial navigation solid-state vibration gyroscope with high precision, high reliability and long life. Compared with traditional mechanical gyroscopes and optical gyroscopes, hemispherical resonant gyroscopes have the following advantages: no high-speed rotors, no moving parts in structure, short start-up time, wide signal frequency band, low drift noise, and can withstand large motor overloads. It has strong radiation resistance, few potential failure factors, and can withstand short-term power interruptions. It is small in size, light in weight, and low in power consumption, especially it has a working life of more than 20 years. Because the hemispherical resonant gyr...

AI Technical Summary

Problems solved by technology

In the actual manufacturing and assembly process of the gyroscope, it is impossible to ensure that the center of the resonator and the center of the outer base are completely coincident, and the installation error between the resonator and the outer base is inevitable, and they will cause errors in the output of the excitation system, resulting in Gyroscope output parameters drift

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