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A system-level accelerometer temperature compensation method

An accelerometer and temperature compensation technology, applied in the direction of speed/acceleration/shock measurement, speed/acceleration/shock measurement equipment testing/calibration, instruments, etc., can solve errors, affect system navigation accuracy, deviation and other problems, and achieve temperature The effects of adaptability guarantee, mutual coupling solution, and ingenious design ideas

Active Publication Date: 2022-04-12
TIANJIN NAVIGATION INSTR RES INST
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Problems solved by technology

[0002] In engineering applications, when the working environment temperature of the accelerometer changes, its scale factor and zero position will have a large deviation with the temperature. If it is not compensated, there will be a large error in the measurement process, which will affect the system. navigation accuracy
[0003] Generally, the accelerometer is installed inside the navigation system, and the temperature characteristics of the accelerometer are tested, modeled and compensated under the working conditions of the system. and the separation of zero and temperature

Method used

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  • A system-level accelerometer temperature compensation method
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  • A system-level accelerometer temperature compensation method

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Embodiment Construction

[0106] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.

[0107] A system-level accelerometer temperature compensation method, comprising the following steps:

[0108] ⑴. Indexing sequence setting

[0109] Table 1 Schematic diagram of the indexing sequence of accelerometer system-level temperature compensation methods

[0110]

[0111] Table 1 shows the orientation of the accelerometer when the temperature compensation of the Z-direction accelerometer, Y-direction accelerometer and Z-direction accelerometer is carried out respectively. According to the indexing sequence setting in Table 1, when performing temperature compensation on the Z-direction accelerometer, in a certain temperature range, make the Z-direction accelerometer point to the sky and the ground resp...

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Abstract

The invention relates to a system-level accelerometer temperature compensation method, which mainly includes indexing sequence setting, accelerometer scale factor error and zero calculation, and temperature compensation model calculation. The method can effectively separate the accelerometer scale factor error and the trend of the zero position changing with temperature, and realize the establishment of the accelerometer scale factor error temperature compensation model and the accelerometer zero temperature compensation model. The design idea of ​​the achievement of the present invention is ingenious and innovative, which better solves the engineering application problem of accelerometer temperature compensation in the inertial navigation system, ensures the temperature adaptability of the inertial navigation system, and has popularization value.

Description

technical field [0001] The invention relates to the technical field of inertial navigation equipment, in particular to a system-level accelerometer temperature compensation method, which can be used for accelerometers in single-axis rotation modulation inertial navigation equipment, dual-axis rotation modulation inertial navigation equipment and strapdown inertial navigation equipment The temperature model is established. Background technique [0002] In engineering applications, when the working environment temperature of the accelerometer changes, its scale factor and zero position will have a large deviation with the temperature. If it is not compensated, there will be a large error in the measurement process, which will affect the system. navigation accuracy. [0003] Generally, the accelerometer is installed inside the navigation system, and the temperature characteristics of the accelerometer are tested, modeled and compensated under the working conditions of the syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00G01P21/00
CPCG01C25/005G01P21/00
Inventor 孙伟强景森学边洪瑞刘伟刘康熊崴
Owner TIANJIN NAVIGATION INSTR RES INST
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