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

An Attitude Calibration Method of Moving Base Based on Autocollimation Tracking

A calibration method and self-collimation technology, which is applied in the field of inertial navigation system attitude calibration, can solve the problems of low system use efficiency, limited use range, and low dynamic accuracy, and achieve equipment simplification, wide measurement range, and fast dynamic response Effect

Active Publication Date: 2022-07-26
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has relatively large limitations. For example, theodolite (total station) instruments, which are widely used in the market, are mainly suitable for static measurement, without dynamic acquisition and self-collimation functions; the combination of laser tracker, camera unit and target unit The measurement system adopts the image measurement method, the dynamic accuracy is low, and the system use efficiency is not high; when the photoelectric autocollimator is used alone, the measured value is the relative change of the angle, and there is no indexing mechanism, so the scope of use is limited

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
  • An Attitude Calibration Method of Moving Base Based on Autocollimation Tracking
  • An Attitude Calibration Method of Moving Base Based on Autocollimation Tracking

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0056] (1) During the static test, the three-axis rocking table 1 is locked to zero, the inertial navigation system 2 is powered on, and the initial alignment state is entered for 6 hours. After the initial alignment is completed, the three-axis rocking table 1 is indexed according to the static test conditions, and then turns to a fixed angle position to stop. After it is stationary, it starts to synchronously collect the pitch, azimuth and inertial navigation system of the dynamic auto-collimation tracking measuring instrument 4. The three-axis attitude angle of 2, the acquisition time is 1 minute, after the sampling is completed, the three-axis rocking table 1 turns to the next fixed position, the dynamic self-collimation tracking measuring instrument 4 moves the measurement position, and re-introduces the ground azimuth angle for synchronous acquisition. A total of 6 positions need to be transferred to collect. After all positions are collected, power off, wait for 5 minute...

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 belongs to the technical field of attitude calibration of inertial navigation systems, and in particular relates to a method for calibrating the attitude of a moving base based on self-collimation tracking. Install the inertial navigation system on the inner frame table of the three-axis swing table, so that the rotation of the outer frame of the three-axis swing table excites the heading angle change of the inertial navigation system, the rotation of the middle frame stimulates the pitch angle change of the inertial navigation system, and the rotation of the inner frame stimulates the change of the pitch angle of the inertial navigation system. The roll angle of the inertial navigation system changes; the eyepiece of the dynamic auto-collimation tracking measuring instrument is firstly self-aligned with the north reference mirror, and the output value of the dynamic auto-collimating and tracking measuring instrument is recorded at this time; The measuring instrument is self-collimated with the azimuth reference mirror of the inertial navigation system, and the output value of the dynamic self-collimation tracking measuring instrument is recorded again. The invention utilizes the automatic tracking and dynamic angle measurement functions of the dynamic self-collimation tracking measuring instrument to realize the real-time calibration of the inertial navigation system attitude under static and dynamic conditions.

Description

technical field [0001] The invention belongs to the technical field of attitude calibration of inertial navigation systems, and in particular relates to a method for calibrating the attitude of a moving base based on self-collimation tracking. Background technique [0002] With the development of science and technology, especially electronic technology and satellite computer technology, inertial navigation, guidance and control have developed rapidly, and the accuracy has become higher and higher. Optical strapdown inertial navigation, such as laser gyro, fiber-optic gyro inertial navigation, has achieved high precision and has been widely used in rockets, missiles, spacecraft and aircraft. Because the inertial navigation system works in a dynamic environment, the attitude angle changes greatly and the frequency is high. Therefore, how to measure and calibrate the dynamic attitude accuracy of the inertial navigation system under dynamic conditions has become an urgent proble...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 商秋芳周玉堂李永刚赵功伟张忠武王震王蕾王强张俊杰
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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