Solid-state resonant gyroscope self-calibration method and system
A resonant gyro and self-calibration technology, which is applied in the direction of measuring devices, instruments, surveying and navigation, etc., can solve the problems of gyroscope repeatability error and separation, achieve excellent measurement accuracy, avoid energy loss, and solve the problem of repeatability error Effect
Active Publication Date: 2020-11-06
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF11 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This error is in the same phase as the Coriolis force and cannot be separated by demodulation, and due to the change of the damping imbalance error of the harmonic oscillator with time or temperature, it is also the main source of the repeatability error of the gyroscope
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0049] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0050] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.
[0051] Gothic vibratory gyroscopes are divided i...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a solid-state resonant gyroscope self-calibration method and system, which relate to the technical field of underground drilling attitude measurement, and aim to realize separation of a zero offset error and an angular rate and fundamentally solve the problem of a repetitive error. According to the calibration method, steady-state signals of key monitoring points in the gyroscope in different working modes are collected in real time through an external feed-in excitation signal, and separation of a zero offset error and an input angular rate is realized through an algorithm, so that a repeatability error of the gyroscope is calibrated; the excitation signals comprise a first excitation signal and a second excitation signal; the first excitation signal and the secondexcitation signal are respectively combined with a demodulated main mode detection signal D-x and a demodulated secondary mode detection signal D+y to realize feed-in; the key monitoring point comprises an output point of the antinode controller and an output point of the node controller, and separation of a zero offset error and an input angular rate is realized according to the excitation signaland an acquisition signal of the monitoring point. The technical scheme provided by the invention can be applied to a measurement-while-drilling system or a navigation system.
Description
【Technical field】 [0001] The invention relates to the technical field of attitude measurement for underground drilling, in particular to a self-calibration method and system for a solid-state resonant gyroscope. 【Background technique】 [0002] When an inertial navigation system composed of a gyroscope and an accelerometer is used for initial alignment or north-seeking, the accuracy of azimuth measurement depends on the observability component of the gyroscope constant value drift in the geographic east direction. When it is completely in the horizontal section, such as The well inclination is at 90°, in the east-west direction, the gyro output in the geographical east direction mainly comes from the Z-axis gyro (such as figure 1 As shown), because its constant value drift is unobservable, it cannot be eliminated, so that GMD (Gyro Measurement while Drilling, referred to as GMD in this paper) cannot achieve satisfactory measurement accuracy in the east-west orientation, espec...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01C25/00G01C19/56G01C21/16
CPCG01C19/56G01C21/165G01C25/005
Inventor 薛旭
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI