Method for extracting signal of campaniform vibrator type angular rate gyroscope

An angular rate gyroscope and signal extraction technology, which is applied in the direction of speed measurement, gyroscope/steering sensing device, speed/acceleration/shock measurement, etc. due to the gyro effect. , to reduce gyro drift, improve temperature characteristics and gyro output resolution, and improve overall performance

Active Publication Date: 2013-12-11
BEIJING INFORMATION SCI & TECH UNIV +1
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Problems solved by technology

At present, the signal extraction method design based on the bell-shaped oscillator type angular rate gyroscope is to use a single sensor for measurement, and there is no specific method for gyroscope signal extraction

Method used

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  • Method for extracting signal of campaniform vibrator type angular rate gyroscope
  • Method for extracting signal of campaniform vibrator type angular rate gyroscope
  • Method for extracting signal of campaniform vibrator type angular rate gyroscope

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Embodiment Construction

[0020] The principle of the bell-shaped oscillator type angular rate gyro is to use the precession of the mode shape angle caused by the rotation of the resonant bell-shaped oscillator to determine the rotation angle of the gyro base around the inertial space. In order to enable the bell-shaped oscillator to generate circular wavenumbers n=2 The ideal mode shape of the bell-shaped oscillator must be accurately controlled, and this frequency is the natural frequency of the bell-shaped oscillator under the mode shape, so that the obtained bell-shaped oscillator can produce an ideal mode shape, thus sensitive to the input Angular rate.

[0021] The sensor distribution of the bell-shaped vibrator is as follows figure 2 shown. 8 piezoelectric sheets: piezoelectric sheet A (1-2), piezoelectric sheet B (1-5), piezoelectric sheet C (1-8), piezoelectric sheet D (1-11), piezoelectric sheet E (1-14), piezoelectric sheet F (1-16), piezoelectric sheet G (1-18), piezoelectric sheet H (1...

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Abstract

The invention relates to a method for extracting the signal of a campaniform vibrator type angular rate gyroscope. The method comprises the following steps of: (1)applying a vibrator excitation signal on an axial direction formed by a piezoelectric patch A and a piezoelectric patch E; (2) extracting the signals of a piezoelectric patch C, a piezoelectric patch G, a piezoelectric patch D, a piezoelectric patch H and eight capacitive sensors; (3) fusing the acquired signals, and computing the output signals of axial directions; (4) carrying out amplitude stability control and frequency stability control on input signals by utilizing output information in the axial directions; (5) computing quadrature error and rate error by utilizing the output information in the axial directions; and (6) synthesizing the computed quadrature error and rate error to generate control moments in the axial directions, and outputting input angle rate. The method disclosed by the invention overcomes the defect of influence of a single piezoelectric device on gyroscope output information, enhances the design accuracy of the campaniform vibrator type angular rate gyroscope and lays a foundation for the design of the campaniform vibrator type angular rate gyroscope.

Description

technical field [0001] The invention belongs to the technical field of angular rate gyroscopes, and in particular relates to a signal extraction method of a bell-shaped oscillator type angular rate gyroscope. Background technique [0002] As an inertial device that is sensitive to the angular motion of the carrier, the gyroscope is the core component of inertial navigation and guidance. The vibration gyroscope based on the principle of Coriolis force has all the inertial qualities, and its status in the field of inertial technology is becoming more and more important. It has been widely concerned as a new generation of inertial instruments. Driven by the development of science and technology and market demand, various vibrating gyroscopes have emerged one after another. [0003] The patent number is: ZL201010215745.1, and the name of the invention is: the patent application of bell-shaped oscillator type angular rate gyro provides a bell-shaped oscillator type angular rate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/5776
Inventor 刘宁邓志红苏中付梦印李擎刘洪
Owner BEIJING INFORMATION SCI & TECH UNIV
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