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Hemispherical resonator gyro high-reliability oscillation starting system and method

A technology of hemispherical resonant gyroscope and hemispherical resonator, which is applied in the direction of gyroscopic effect for speed measurement, gyroscope/steering sensing equipment, measuring device, etc., which can solve the problem that the frequency of excitation signal and the resonant frequency of the resonator are offset, and the gyroscope cannot quickly enter into stability. Problems such as working status and gyro failure

Active Publication Date: 2017-01-04
BEIJING INST OF CONTROL ENG
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Problems solved by technology

On the one hand, due to the drift of the analog circuit parameters and the drift of the resonant frequency of the resonator itself at different temperatures, the frequency of the excitation signal and the resonant frequency of the resonator will deviate in practical applications, which will cause longer start-up time and make the gyro unable to quickly Enter the stable working state, heavy will cause the vibration to fail, and the gyro will fail

Method used

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  • Hemispherical resonator gyro high-reliability oscillation starting system and method
  • Hemispherical resonator gyro high-reliability oscillation starting system and method
  • Hemispherical resonator gyro high-reliability oscillation starting system and method

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Embodiment

[0058] Such as figure 1 As shown, a hemispherical resonant gyroscope with a high reliability starting system, the hemispherical resonant gyroscope includes a hemispherical resonator, a resonance signal detection electrode and an excitation electrode;

[0059] The system includes: zero-crossing signal detection module, frequency sweep start-up module, start-up detection module, frequency selection module, digital frequency synthesis DDS module, phase-locked loop DPLL, DA control module, digital-to-analog conversion module and high-voltage drive module.

[0060] Such as figure 2 As shown, a hemispherical resonant gyroscope high reliable start-up method, the steps include:

[0061] (1) The resonant signal detection electrode detects the resonant motion of the hemispherical resonator and obtains an AC voltage signal, such as image 3 as shown in (a);

[0062] (2) The zero-crossing signal detection module performs zero-crossing comparison on the AC voltage signal to obtain a sq...

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Abstract

The invention relates to a hemispherical resonator gyro high-reliability oscillation starting system and method, is suitable for oscillation starting control of hemispherical resonator gyro or oscillation gyro having similar working principles and belongs to the technical field of inertia instrument control. By utilizing frequency selecting characteristics and high-Q-value characteristics of a hemispherical resonator gyro harmonic oscillator, a frequency sweep oscillation starting module can constantly output frequency signals around resonant frequency to excite the harmonic oscillator to start oscillation when no resonant signal is detected, so that the harmonic oscillator can be ensured to start oscillation, and reliability is high.

Description

technical field [0001] The invention relates to a high-reliability start-up system and method for a hemispherical resonant gyroscope, which is suitable for the start-up control of a hemispherical resonant gyroscope or a vibrating gyroscope with a similar working principle, and belongs to the technical field of inertial instrument control. Background technique [0002] The hemispherical resonator gyroscope (HRG) is an angular velocity sensor that uses a radial standing wave sensitive base of a spherical shell structure to rotate. Generally, its sensitive element is a wine glass-shaped hemispherical resonator, which oscillates at its resonant frequency under a low-amplitude standing wave. The hemispherical resonant gyroscope mainly includes three components: hemispherical resonator, excitation cover (torquer) and sensitive base (signaler), all of which are made of fused silica. And packaged in a high vacuum environment, it has a high quality factor, usually 10 7 above. Due ...

Claims

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Application Information

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IPC IPC(8): G01C19/5691
CPCG01C19/5691
Inventor 武志忠李建朋冯士伟刘吉利李恺付明睿李杰彦王月
Owner BEIJING INST OF CONTROL ENG
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