Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Damping method of fiber option gyroscope (FOG) strap-down inertial navigation system

A strapdown inertial navigation and fiber optic gyroscope technology, which is used in navigation calculation tools, navigation through speed/acceleration measurement, etc., can solve the problem of inability to eliminate the error oscillation of the speed and position of the inertial navigation system.

Inactive Publication Date: 2010-04-21
HARBIN ENG UNIV
View PDF0 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the "Fuzzy Adaptive Filtering Algorithm for Internal Damping of Heading Attitude System" in Volume 39, Number 2, "Journal of Nanjing University of Aeronautics and Astronautics" in April 2007, it is applied to the heading attitude system in the way of adaptive internal damping, however Unable to eliminate INS velocity and position error oscillations

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Damping method of fiber option gyroscope (FOG) strap-down inertial navigation system
  • Damping method of fiber option gyroscope (FOG) strap-down inertial navigation system
  • Damping method of fiber option gyroscope (FOG) strap-down inertial navigation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0057] combine figure 1, the damping technical solution that can independently eliminate the inherent vibration of the strapdown inertial navigation system is as follows:

[0058] Step 1. Obtain the initial pose of the carrier through initial alignment.

[0059] Step 2. The angular velocity input on the carrier coordinate system is measured by the fiber optic gyroscope, and the acceleration input on the carrier coordinate system is measured by the accelerometer.

[0060] The resulting angular velocity is ω ib b = ω ibx b ω iby b ω ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a damping method of a fiber option gyroscope (FOG) strap-down inertial navigation system, mainly comprising the following steps: acquiring the initial attitude of a carrier by initial alignment; measuring angular velocity input and acceleration input on a carrier coordinate system; calculating an initial attitude matrix; converting carrier-system acceleration output into platform-system acceleration; acquiring all current velocity and angular velocity values; conducting horizontal damping on velocity information; calculating the attitude angular velocity of the carrier to a mathematics platform system; updating the current attitude matrix with quaternion numbers; outputting a carrier attitude angel; and entering the next time cycle. The invention adds suitable horizontal damping in a velocity information position of a horizontal loop of the system to eliminate the Shura periodic oscillation and the Foucault periodic oscillation of the system and adds a suitable directional damping network in an earth angular velocity input information position to eliminate the earth 24-hour periodic oscillation of the system, thereby improving the accuracy of a ship strap-down inertial navigation system.

Description

(1) Technical field [0001] The present invention relates to a method for eliminating the oscillation error of the fiber optic gyro strapdown inertial navigation system, specifically adding an adjustment network at a specific position of the strapdown inertial navigation system to change the error oscillation characteristics of the strapdown inertial navigation system, A method to eliminate three periodic oscillation errors of the system. (2) Background technology [0002] Inertial navigation system is an autonomous navigation and positioning system with gyroscope and angular velocity meter as its measuring components. Due to its high measurement accuracy, real-time performance, and no need for any external information during the measurement process, it has strong autonomy and is widely used. And aerospace, navigation and other aspects. Its basic principle is mainly to use the acceleration of gravity and the earth's rotational speed information for navigation, and use the Sh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01C21/16G01C21/20
Inventor 高伟张义徐博奔粤阳张鑫李仔冰龚晶王武剑柴永利付建楠
Owner HARBIN ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com