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Method for calibrating zero offset of quartz flexible accelerometer component

An accelerometer, zero offset technology, applied in the testing/calibration of velocity/acceleration/shock measurement equipment, velocity/acceleration/shock measurement, navigation through velocity/acceleration measurement, etc. Many problems, such as poor real-time performance

Inactive Publication Date: 2011-02-16
HARBIN ENG UNIV
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Problems solved by technology

The discrete calibration method has the following disadvantages: 1) After-event processing, real-time performance is not strong; 2) The amount of data is large, and there are many data to be recorded, and with the increase of calibration parameters, the amount of data increases sharply and takes a long time; 3) Calibration accuracy directly depends on the accuracy of the test turntable
[0006] Therefore, explore a new calibration method suitable for the measurement components of the quartz flexible accelerometer, overcome the shortcomings of the previous discrete calibration method of the quartz flexible accelerometer component, such as low precision and complex data processing, and quickly and efficiently calibrate the calibration of the quartz flexible accelerometer component The coefficient is positive

Method used

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  • Method for calibrating zero offset of quartz flexible accelerometer component
  • Method for calibrating zero offset of quartz flexible accelerometer component
  • Method for calibrating zero offset of quartz flexible accelerometer component

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Embodiment Construction

[0084] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0085] The measurement method of the zero offset of the quartz flexible accelerometer assembly described in this embodiment, its specific implementation steps are as follows:

[0086] Step 1. Place the strapdown inertial navigation system equipped with quartz flexible accelerometer components on the three-axis position turntable. The axis of rotation of the frame is parallel. The strapdown inertial navigation system is preheated, and the preheating time is set according to the specific system.

[0087] Step 2. Operate the three-axis position turntable to adjust the strapdown inertial navigation system (that is, the quartz flexible accelerometer assembly) to figure 1 location shown. Capture the output of the quartz flexure accelerometer and fiber optic gyroscope assembly in terms of gravitational acceleration and the Earth's angular velocity Coarse alignment...

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Abstract

The invention relates to a method for calibrating zero offset of a quartz flexible accelerometer component, which is a system grade calibrating method using a velocity error as observed quantity. In the method, the conventional calibration equipment is still used, the six-position calibration scheme has simple operation and high calibration accuracy; and compared with conventional multi-position division calibration test, the calibrating time of the method of the invention is greatly shortened, calibration errors caused by rotary table errors when multiple positions are calibrated are reduced, and the navigation performance of a strapdown inertial navigation system can be improved. The invention provides a practical system grade calibration method for the accelerometer component.

Description

technical field [0001] The invention relates to a component calibration method, in particular to a calibration technology for the zero offset of a quartz flexible accelerometer assembly. Background technique [0002] In the strapdown inertial navigation system, the accelerometer component is used as a sensor of the specific force acceleration of the sensitive carrier, and its accuracy directly affects the navigation accuracy of the strapdown inertial navigation system. The quartz flexible accelerometer has the advantages of simple structure and process, low cost and high reliability. Therefore, the quartz flexible accelerometer assembly composed of the quartz flexible accelerometer is widely used in the strapdown inertial navigation system. [0003] Calibration technology is a method to improve the measurement accuracy of the quartz flexible accelerometer from the aspect of software. The accelerometer zero offset refers to the deviation from the zero point of the specific ...

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Application Information

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IPC IPC(8): G01C21/16G01P21/00G01C25/00
Inventor 孙枫曹通高伟唐李军胡丹王根李举锋奔粤阳徐博于强
Owner HARBIN ENG UNIV
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