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MEMS inertial navigation system calibration method

A calibration method and inertial navigation system technology, which are applied in radio wave measurement systems, satellite radio beacon positioning systems, instruments, etc., can solve the problems of high-precision turntable dependence, cumbersome turntable calibration process, etc., to improve test efficiency and save production. The effect of test cost and good calibration effect

Pending Publication Date: 2022-08-05
北京海为科技有限公司
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Problems solved by technology

[0005] Aiming at the problem that conventional error calibration methods such as the existing static 24-position method rely too much on high-precision turntables, require turntables to seek north and the calibration process is cumbersome, the present invention provides a MEMS inertial navigation system calibration method

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Embodiment Construction

[0038] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0039] like figure 1 As shown, a method for calibrating a MEMS inertial navigation system includes the steps:

[0040] S1, the inertial navigation is loaded into the turntable; S2, the turntable is powered on; S3, the calibration data of the turntable at the calibration position is measured within the preset temperature range; in step S3, the preset temperature range is -40°C-60°C, and every 10°C is A node that measures temperature. A total of 11 temperature nodes are measured: -40°C, -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, and 60°C. At each temperature point, the X-axis refers to the sky and the ground, the Y-axis refers to the sky and the ground, the Z-axis refers to th...

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Abstract

The invention discloses an MEMS inertial navigation system calibration method. The method comprises the following steps: S1, loading an inertial navigation system into a rotary table; s2, electrifying the rotary table; s3, measuring calibration data of the rotary table at the calibration position within a preset temperature range; s4, substituting the calibration data into the error compensation model of the gyroscope and the acceleration to calculate a corresponding parameter result; and S5, burning the parameters into the inertial navigation system. According to the invention, the calibration time is greatly shortened, the test efficiency is effectively improved, and the production test cost is saved.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation systems, and in particular relates to a calibration method for a MEMS inertial navigation system. Background technique [0002] With the development of MEMS inertial technology, MEMS inertial measurement system has become the first choice for various tactical weapon guidance systems due to its advantages of low cost, small size, integration, low power consumption, high impact resistance, and mass production. The attitude accuracy of the strapdown measurement system constructed by the MEMS inertial device mainly depends on the drift of the gyroscope, and the accuracy is relatively low. [0003] The low-frequency error of the inertial device is modulated by the regular rotation of the inertial component (MIMU) around the rotation axis. This rotation modulation technology has become one of the key technologies to improve the accuracy of inertial navigation abroad. Compensating the system...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C25/00G01S19/43
CPCG01C25/005G01S19/43
Inventor 陈海涛牛志贤
Owner 北京海为科技有限公司
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