Determination method and system for unbalance mass of cylindrical shell gyroscope harmonic oscillator

A technology of balancing mass and cylindrical shell, which is applied in the direction of speed measurement, gyroscope/steering sensing device, measuring device, etc. due to the gyro effect, which can solve the unbalanced mass of the cylindrical shell gyro resonator and cannot calculate the orientation of the unbalanced mass. and size and other issues, to achieve the effect of low cost

Active Publication Date: 2018-11-20
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method and system for determining the unbalanced mass of a cylindrical shell gyro resonator, aiming at solving the problem that the unbalanced mass cannot be calculated in the prior art. size problem

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  • Determination method and system for unbalance mass of cylindrical shell gyroscope harmonic oscillator
  • Determination method and system for unbalance mass of cylindrical shell gyroscope harmonic oscillator
  • Determination method and system for unbalance mass of cylindrical shell gyroscope harmonic oscillator

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[0037] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] Such as figure 2 As shown, the gyroscope used in the present invention includes: a resonator 10, a support rod 20 connected to the bottom end of the resonator 10, a turntable 30 for installing the support rod 20, a cantilever in contact with the support rod 20 The beam 40 is provided on the cantilever beam 40 to measure the vibration of the support rod 20 of the resonator 10 and the piezoelectric electrode 50 . The resonator 10 is in the shape of a circular tube, made of iron-nickel alloy, and has magnetic permeability. In the present invention, the electromagnetic force applie...

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Abstract

The invention discloses a determination method and system for the unbalance mass of a cylindrical shell gyroscope harmonic oscillator. The method comprises the following steps: A, applying a driving signal to an electromagnet to excite the natural mode of vibration of oscillator, wherein the frequency of the driving signal is equal to the inherent frequency of the oscillator; B, measuring a vibrating signal of an oscillator supporting rod by means of an piezoelectric electrode to obtain an output amplitude of the piezoelectric electrode; and C, rotating the vibrator at different angles, and fitting the output amplitude of the corresponding piezoelectric electrode to obtain an azimuth angle of the unbalance mass and the amplitude of the unbalance mass. By exciting the natural mode of vibration of oscillator, the vibrating amplitude of the supporting rod at different angles is measured, and fitting analysis is performed on the measured data, so that the azimuth of the unbalance mass andthe amplitude of the unbalance mass can be judged conveniently and rapidly, and the cost is extremely low.

Description

technical field [0001] The invention relates to the technical field of gyroscopes, in particular to a method and system for determining the unbalanced mass of a gyroscope harmonic oscillator with a cylindrical shell. Background technique [0002] In the prior art, the manufacturing error of the harmonic oscillator makes the stiffness and damping distribution of the harmonic oscillator in the circumferential direction uneven, which is an important reason for the zero offset drift of the gyro output. The frequency cracking of the harmonic oscillator is caused by the uneven distribution of stiffness, and the zero offset drift caused by frequency cracking can be eliminated by adjusting the frequency of the harmonic oscillator and combining the quadrature control loop in the gyro measurement and control circuit. The zero offset drift caused by uneven damping cannot be eliminated through circuit control for the time being. Generally, the influence of uneven damping is reduced by i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00G01C19/5663
CPCG01C19/5663G01C25/005
Inventor 吴宇列吴学忠肖定邦席翔张勇猛曲洛振
Owner NAT UNIV OF DEFENSE TECH
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