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Analysis method for random errors of MEMS gyroscope

A technology of random error and analysis method, applied in the field of inertial device testing and data analysis, can solve the problems of inability to determine random errors, inability to guarantee the use accuracy of MEMS gyroscopes, etc., and achieve the effect of ensuring the use accuracy and performance

Pending Publication Date: 2021-04-30
SHAANXI AEROSPACE TIMES NAVIGATION EQUIP CO LTD
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Problems solved by technology

[0003] In order to solve the defect that the random error cannot be determined in the above-mentioned prior art, and the use accuracy of the MEMS gyroscope cannot be guaranteed, the present invention provides an analysis method for the random error of the MEMS gyroscope

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  • Analysis method for random errors of MEMS gyroscope
  • Analysis method for random errors of MEMS gyroscope
  • Analysis method for random errors of MEMS gyroscope

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Embodiment Construction

[0036] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0037] The technical scheme of the present invention is as follows: a method for analyzing random errors of MEMS gyroscopes, comprising the steps of:

[0038] S1: Collect the original output data of the MEMS gyroscope, and use Allan variance to analyze the original output data of the MEMS gyroscope;

[0039] S2: Draw the log-log curve of Allan variance according to the original output data of the MEMS gyroscope, and analyze the error type according to the log-log curve of Allan;

[0040] S3: Determine the main random error coefficient of the MEMS gyroscope according to Allan variance calculation;

[0041] S4: Establish a filtering model of the gyroscope error according to the main random error coefficient of the MEMS gyroscope.

[0042] S1: Collect the...

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Abstract

The invention provides an analysis method for random errors of an MEMS gyroscope. The method comprises the following specific steps of: acquiring original output data of the MEMS gyroscope, analyzing the original output data of the MEMS gyroscope according to Allan variance, drawing a double logarithmic curve of Allan, analyzing an error type according to the double logarithmic curve of Allan, calculating and determining a main random error coefficient of the MEMS gyroscope by utilizing the Allan variance, and establishing a filtering model of gyroscope errors according to the main random error coefficient of the MEMS gyroscope. The filtering model of the main random errors of the gyroscope is compensated, and the use precision and performance of the MEMS gyroscope are ensured.

Description

technical field [0001] The invention relates to the fields of inertial device testing and data analysis, in particular to an analysis method for random errors of MEMS gyroscopes. Background technique [0002] The measurement errors of MEMS gyroscopes mainly include deterministic errors and random errors. Among them, deterministic errors include zero bias errors, scale factor errors, and installation errors, etc., which can be compensated by high-precision turntables according to the error compensation model; and random errors The error can only establish a statistical error model according to the statistical law of the data. In practical applications, on the basis of compensating the deterministic error of the gyroscope, the random error cannot be determined, and the use accuracy of the MEMS gyroscope cannot be guaranteed, which affects the performance of the MEMS gyroscope. Contents of the invention [0003] In order to solve the defect in the prior art that the random e...

Claims

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Application Information

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IPC IPC(8): G01C19/00G01C25/00
CPCG01C19/00G01C25/00
Inventor 任春苗
Owner SHAANXI AEROSPACE TIMES NAVIGATION EQUIP CO LTD
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