Output error compensating process for open-loop optic fiber gyroscope based on neural network

A fiber optic gyroscope and neural network technology, applied in the inertial field, can solve problems affecting the accuracy of compensation

Inactive Publication Date: 2006-11-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nonlinearity of the open-loop FOG scale factor itself, it is easy to take the error caused by the nonlinearity of the open-loop FOG scale factor as the error caused by other factors when calculating the error coefficient, resulting in the coupling of the error coefficient and affecting the compensation. precision

Method used

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  • Output error compensating process for open-loop optic fiber gyroscope based on neural network
  • Output error compensating process for open-loop optic fiber gyroscope based on neural network
  • Output error compensating process for open-loop optic fiber gyroscope based on neural network

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specific Embodiment approach

[0053] Illustrate the specific implementation of the present invention with a specific embodiment, mainly comprise following four steps:

[0054] (1) Establish a neural network model

[0055] In this embodiment, the output voltage of the open-loop fiber optic gyroscope is used as the input of the neural network, and the angular velocity sensitive to the gyroscope is used as the output of the neural network to construct a single-input and single-output three-layer forward neural network. Select the number of input layer nodes as 1, the number of hidden layer nodes as 5, and the number of output layer nodes as 1.

[0056] (2) Obtain learning samples

[0057] turntable

input

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spinning top

output

-2.5591

-2.4354

-2.3042

-2.1661

-2.0219

-1...

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Abstract

The disclosed output error compensation method for open-loop optical fiber gyro based on NN comprises: (1) creating a NN model; (2) obtaining the learning sample; (3) training the BPNN; and (4) compensating the output error. As the well parallel processing, nonlinear mapping, robust tolerance, and generalization capability of NN, this invention improves gyro precision and application range.

Description

technical field [0001] The invention belongs to the technical field of inertia and relates to an open-loop fiber optic gyroscope, in particular to a method for compensating the output error of the open-loop fiber optic gyroscope, which is suitable for medium and low-precision low-cost navigation systems and positioning and orientation systems. Background technique [0002] The open-loop fiber optic gyro has the characteristics of small zero bias, high sensitivity, large dynamic range, fast response, good stability, and low cost. It has a good application prospect in low-cost attitude and navigation systems. Before the comprehensive performance of the miniaturized closed-loop fiber optic gyroscope such as volume, price, performance, and reliability does not meet the requirements, the open-loop fiber optic gyroscope still has great application value in the field of medium and low precision applications. At present, the open-loop fiber optic gyroscopes used in China are mostly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72
Inventor 房建成张延顺杨胜李金涛张海鹏
Owner BEIHANG UNIV
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