Hemispherical resonator gyroscope temperature error indirect compensation method

A hemispherical resonant gyro and temperature error technology, applied in the field of inertial instruments, can solve the problems of affecting the resonance state, occupying space, unscientific, etc., and achieve the effect of reducing temperature error and improving output accuracy
CN114485601APending Publication Date: 2022-05-13中国人民解放军火箭军工程大学
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
中国人民解放军火箭军工程大学
Publication Date
2022-05-13

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Abstract

The invention discloses a hemispherical resonator gyroscope temperature error indirect compensation method which is characterized by comprising the following steps: acquiring gyroscope output and resonance frequency of a hemispherical resonator gyroscope at a constant temperature; calculating the output drift of the hemispherical resonator gyroscope at each temperature point, and taking the output drift as a reference value for evaluating the temperature error compensation effect; indirectly measuring the temperature of the harmonic oscillator based on the hemispherical resonant frequency; and establishing an indirect compensation model of the temperature error and the resonant frequency based on a multiple regression theory. From the perspective of reducing the temperature error of the hemispherical resonator gyroscope, the resonant frequency of the hemispherical resonator is used for indirectly measuring the internal temperature of the resonator based on the corresponding relation between the internal temperature of the resonator and the resonant frequency, and in a temperature model, an independent variable is replaced by the resonant frequency from temperature, so that the temperature error of the hemispherical resonator gyroscope is reduced. A temperature error model and a multiple regression model of resonant frequency and resonant frequency change rate are established, and the temperature error model is used for compensating gyroscope output, so that the gyroscope output precision can be effectively improved.
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Description

technical field

[0001] The invention relates to the technical field of inertial instruments, in particular to an indirect compensation method for temperature errors of hemispherical resonant gyroscopes. Background technique

[0002] Hemispherical resonant gyroscopes have many advantages such as long life, high precision, radiation resistance, low power consumption, overload tolerance, high stability, and high reliability. Wide application prospects. However, due to the limitation of the current technology level and the temperature characteristics of the material, the output of the hemispherical resonant gyroscope changes with the change of temperature, that is, the measurement accuracy of the gyroscope is more sensitive to the temperature change. Therefore, it is necessary to compensate the temperature error of the gyroscope to improve the measurement accuracy of the gyroscope under the condition of temperature change.

[0003] Hemispherical resonant gyro temperature error...

Claims

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