Method for checking perpendicularity between adjacent axes of dual-axis rotary inertial measurement device by using accelerometer

An inertial measurement device and dual-axis rotation technology, applied in measurement devices, instruments, etc., can solve the problems of cumbersome process and long time-consuming, and achieve the effect of shortening time, reducing cost, and ingenious design ideas.

Active Publication Date: 2018-05-15
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

At present, the light pipe method or the electronic level method is usually used to detect the verticality, which requires high-precision measuring instruments for detection, and requires related auxiliary

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  • Method for checking perpendicularity between adjacent axes of dual-axis rotary inertial measurement device by using accelerometer
  • Method for checking perpendicularity between adjacent axes of dual-axis rotary inertial measurement device by using accelerometer
  • Method for checking perpendicularity between adjacent axes of dual-axis rotary inertial measurement device by using accelerometer

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[0038] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings. It should be noted that this embodiment is descriptive and not restrictive, and the protection scope of the present invention cannot be limited by this.

[0039] A method for checking the verticality of adjacent axes of a dual-axis rotating inertial measurement device using an accelerometer, including the following steps:

[0040] ⑴. Determine the composition of verticality error:

[0041] image 3 Where α is the angle between the axis of the outer frame and the plumb line, β is the perpendicularity between the axis of the inner frame and the axis of the outer frame, and γ is the installation error angle of the accelerometer;

[0042] ⑵. Leveling dual-axis rotating inertial measurement device:

[0043] Rotate the azimuth axis of the dual-axis rotating inertial measurement device 1, and read the output of the quartz flexible accelerometer 3 at 0°, 90°, 180°, 270°...

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Abstract

The invention relates to a method for checking the perpendicularity between the adjacent axes of a dual-axis rotary inertial measurement device by using an accelerometer, including the following steps: (1) determining the composition of perpendicularity error, wherein beta is the perpendicularity between an inner frame axis and an outer frame axis; (2) leveling a dual-axis rotary inertial measurement device; (3) setting the horizontal axis to 0 degrees, and obtaining A; (4) setting the horizontal axis to 180 degrees, and obtaining B; and (5) obtaining the perpendicularity beta between the inner frame axis and the outer frame axis through calculation. The practical engineering application problem about the perpendicularity between the horizontal axis and the azimuth axis of a dual-axis rotary inertial measurement device is solved, and the applicability of a dual-axis rotary inertial measurement device shafting test method is guaranteed. By using the method of the invention, the dependence of measurement on external means can be reduced, the cost can be reduced, and the efficiency can be improved. The method is of promotion value.

Description

technical field [0001] The invention relates to the technical field of dual-axis rotary inertial measurement devices, in particular to a method for checking the perpendicularity of adjacent axes of a dual-axis rotary inertial measurement device by using an accelerometer. Background technique [0002] The dual-axis rotary inertial measurement unit is the main instrument of the laser inertial navigation system. The dual-axis rotary inertial measurement device is a high-precision inertial navigation system that uses a mechanically shaken laser gyroscope and a quartz flexible accelerometer as inertial sensitive components, sampling mechanical horizontal and azimuth dual-axis rotation modulation technology. [0003] The structural configuration of the dual-axis rotary inertial measurement device is a structural form of inner horizontal and outer orientation, and the inertial elements are modulated by the rotation of the horizontal axis and the orientation axis respectively. [0...

Claims

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Application Information

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IPC IPC(8): G01B21/22
CPCG01C25/005
Inventor 徐凯孙伟强张群姚宇罗振晶张媛新张波
Owner TIANJIN NAVIGATION INSTR RES INST
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