Spherical piezoelectric stator type gyroscope

Abstract

The invention discloses a spherical piezoelectric stator type gyroscope, which comprises a spherical stator, a spherical rotor and a clamping device, wherein the spherical stator is formed by fastening a first hemispherical piezoelectric stator and a second hemispherical piezoelectric stator and assembling in a sealing way, and an accommodating cavity is formed between the first and second hemispherical piezoelectric stators; inner spherical surfaces of the two hemispherical piezoelectric stators are plated with silver electrodes, and the outer spherical surfaces of the two hemispherical piezoelectric stators are plated with the silver electrodes by partitions in the same form; the spherical rotor is positioned in the accommodating cavity of the spherical stator; the clamping device comprises a first axial clamping device and a second axial clamping device which are fixed at two ends of a polar axis of the spherical stator respectively, and a radical clamping device fixed on an equatorial plane of the spherical stator; a sinusoidal voltage signal with a phase difference of phi / 2 is applied to odd partitions and even partitions of the first hemispherical piezoelectric stator respectively, so that a first travelling wave is excited; the second hemispherical piezoelectric stator is powered up in the same way as the first hemispherical piezoelectric stator, so that a second travelling wave is excited; and the spherical rotator rotates in a suspended way under the action of the first and second travelling waves. The gyroscope has simple structure and high precision.

Description

Technical field [0001] The invention belongs to the field of suspended mechanical gyroscopes, and particularly relates to an attitude sensitive gyroscope. Background technique [0002] Gyroscope is a kind of angular motion detection device that uses the moment of momentum sensitive shell of a high-speed rotating body to rotate one or two axes orthogonal to the rotation axis relative to the inertial space. It mainly includes a gyro rotor, an inner and outer frame and accessories (referring to torque motors, Signal sensor, etc.). [0003] The non-contact support system can effectively reduce the interference torque and improve the accuracy of the gyro system. Due to the mechanism of electrostatic gyroscopes and magnetic levitation gyroscopes, the cost of high precision brings demanding manufacturing and processing requirements and high costs, and even further improvement of accuracy encounters insurmountable technical bottlenecks. The system is extremely complex and difficult to m...

AI Technical Summary

Problems solved by technology

Due to the mechanism of electrostatic gyroscopes and magnetic levitation gyroscopes, the price of high precision brings stringent requirements and high costs for manufacturing and processing, and even encounters insurmountable technical bottlenecks when further improving the accuracy. The system is extremely complex and difficult to miniaturize , so that it has not been widely used in the field

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