Vector correcting method for non-gyro accelerometer array mounting error

A technology for accelerometer and installation error, which is applied in the direction of speed/acceleration/shock measurement, measurement of acceleration, testing/calibration of speed/acceleration/shock measurement equipment, etc. No problems such as installation error of gyro accelerometer array

Active Publication Date: 2007-11-07
ZHONGBEI UNIV
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Problems solved by technology

[0003] The present invention provides a vector correction method for the installation error of the gyro-free accelerometer array

Method used

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  • Vector correcting method for non-gyro accelerometer array mounting error
  • Vector correcting method for non-gyro accelerometer array mounting error
  • Vector correcting method for non-gyro accelerometer array mounting error

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Embodiment Construction

[0059] Taking the 9 accelerometer array as an example, the 9 accelerometers are divided into 3 groups, the accelerometers a, b, f are a group, the accelerometers c, d, h are a group, and the accelerometers e, g, i are a group ,As shown in Figure 1. In the accelerometer cube array, ideally the sensitive directions of the accelerometer groups a, b, f, c, d, h, e, g, i are orthogonal, but it cannot be realized in the actual installation, so the accelerometer groups a, b , the actual sensitive direction of f, c, d, h, e, g, i is non-orthogonal, which is the non-orthogonal coordinate system a.

[0060] There is no vector correction method for the installation error of the gyro accelerometer array, design any group in the accelerometer array—accelerometer group j, when the installation orientation error and installation position error are not compensated, the output specific force of the accelerometer group j is A j ** , when the installation orientation error is not compensated, ...

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Abstract

The invention relates to a measurement error correcting method, concretely a vector correcting method for gyro-free acceleration meter array installation error, offsetting the installation position error and installation azimuth error one by one to offset the acceleration meter array installation error, and as compared with the existing techniques, it has features of less calculation quantity, accurate results, and being able to raise data accuracy by at least one order of magnitude.

Description

technical field [0001] The invention relates to a measurement error correction method, in particular to a vector correction method without installation errors of gyroscope accelerometer arrays. Background technique [0002] In the inertial system, there will always be errors in the installation of the inertial instrument. If the installation error is relatively large, it will have a great impact on the system accuracy. In the strapdown inertial system, due to the harsh working environment, it is more necessary to compensate the installation error of the inertial instrument. Therefore, in order to further improve the accuracy of the inertial system, it is necessary to study the correction method of the installation error of the inertial instrument. The installation error includes installation position error and installation orientation error, so the data measured by the accelerometer should be compensated for the installation error, and then the attitude parameters can be cal...

Claims

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Application Information

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IPC IPC(8): G01P21/00G01P15/00
Inventor 秦丽张文栋熊继军刘俊余靖娜李杰孟令军张会新
Owner ZHONGBEI UNIV
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