Hemispherical harmonic oscillator mode axis and quality factor detection device

Abstract

The invention discloses a device for detecting the modal axis and the quality factor of a hemispherical resonator, and belongs to the technical field of electromechanical integration. The device includes an electrode assembly, a support assembly and a signal acquirer, the support assembly is used for supporting the center rod of the hemispherical resonator, the electrode assembly includes a pair of excitation electrodes for loading an excitation to the hemispherical resonator in order to vibrate the hemispherical resonator, and the signal acquirer is used for acquiring vibration information and determining the modal axis and the quality factor of the hemispherical resonator according to the vibration information. The device can realize the detection of the modal axis and the quality factorof the hemispherical resonator without assembling the hemispherical resonator into a gyro, and the assembling scheme of a hemispherical resonator gyro can be determined according to the detection result.

Description

technical field [0001] The invention relates to a hemispherical harmonic oscillator mode axis and quality factor detection device, which belongs to the technical field of electromechanical integration. Background technique [0002] In the technical system of national defense weapons and equipment, inertial technology is the core technology of navigation and positioning, guidance and control, stable aiming and image stabilization, attitude measurement and overload sensing. Inertial instrument is the basis of inertial technology, and the technical state and level of gyroscope is the core of restricting the research content of inertial technology. The metal vibrating gyroscope is a new type of solid gyroscope developed in recent years. It has the characteristics of simple structure, low cost, stable performance, small size, light weight and high reliability. Speed ​​measurement and other civilian fields and military fields. [0003] The metal hemispherical resonator is the co...

AI Technical Summary

Problems solved by technology

Compared with the quartz hemispherical resonator, the processing of the metal hemispherical resonator is relatively simple, the yield is high, and it is easy to form large-scale production, and does not require special equipment. Modern machining centers can meet these requirements, but due to equipment and processing technology, etc. Error factors, there are always some deviations between the actual harmonic oscillator and the ideal symmetrical shape, which directly manifests as four-antinode working mode frequency splitting, and the mode axis is fixed along the radial direction of the harmonic oscillator, which is reflected in the output of the gyroscope as a slow variable sinusoidal noise drift

Generally, the frequency difference of the processed harmonic oscillator does not meet the requirements of use, and it is necessary to reduce the frequency difference of the harmonic oscillator through tuning, and the determination of the position of the mode axis is a key step in the tuning of the harmonic oscillator. The harmonic oscillator is assembled into a gyroscope Tuning was required before, but tuning when the position of the modal axis is unknown will increase the tuning steps and prolong the tuning time. At present, it is only possible to determine the position of the modal axis through the output signal after the harmonic oscillator is assembled into a gyroscope, and the tuning is difficult. large, difficult to achieve

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