Scale error compensation strategy for rotary type strapdown inertial navigation gyroscope

A scale error, strapdown inertial navigation technology, applied in the field of inertial navigation, can solve the problems of positive and negative asymmetry, optical gyro scale factor error, inertial element scale factor error, etc., to achieve the effect of improving accuracy and stability

Active Publication Date: 2017-08-18
中国船舶重工集团公司第七〇七研究所
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the scale factor of the inertial element cannot be calibrated absolutely accurately, and the scale factor will change with time, environment and other factors, the scale factor error of the inertial element

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
  • Scale error compensation strategy for rotary type strapdown inertial navigation gyroscope
  • Scale error compensation strategy for rotary type strapdown inertial navigation gyroscope
  • Scale error compensation strategy for rotary type strapdown inertial navigation gyroscope

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings:

[0024] A rotary strapdown inertial navigation gyroscope scale error compensation strategy, such as figure 1 As shown, including the following steps:

[0025] Step 1. The inertial navigation equipment is initialized and roughly aligned.

[0026] (1) The inertial navigation equipment is powered on, and the two rotating shafts rotate to their respective zero positions according to the preset control instructions;

[0027] (2) Binding the initial position, complete the rough alignment process according to the preset rough alignment scheme, and obtain the rough alignment result.

[0028] Step 2. Two-axis rotation modulation fine alignment.

[0029] The inertial navigation enters the fine alignment stage, and begins to perform periodic rotation according to a predetermined plan. After the fine alignment is completed, the inertial navigation enters the naviga...

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 relates to a scale error compensation strategy for a rotary type strapdown inertial navigation gyroscope. The scale error compensation strategy is characterized by including the steps of firstly, performing power-up initializing and coarse alignment on inertial navigation equipment; secondly, performing double-shaft rotation modulation fine alignment; thirdly, performing compensation calculation on gyroscope scale errors and performing compensation. The scale error compensation strategy has the advantages that the new gyroscope scale after compensation is calculated by analyzing the causes of azimuth angle oblique shifting and according to inertial navigation output azimuth angles, compensation calculation is performed in the gyroscope scale errors, the rotary type strapdown inertial navigation gyroscope scale factor errors can be compensated effectively, the gyroscope scale factor errors can be compensated forwardly and reversely, and inertial navigation data output precision and stability are increased.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation, in particular to a scale error compensation strategy of a rotary strapdown inertial navigation gyroscope. Background technique [0002] The purpose of the rotating mechanism in the rotary inertial navigation system is to allow the errors caused by the constant drift of the inertial elements to cancel each other out in a rotation cycle. The corresponding technology is also called the system error averaging technology and is widely used. In the current optical gyro inertial navigation system, the accuracy of the gyroscope is usually expressed by resolution and drift. Since the scale factor of the inertial element cannot be calibrated absolutely accurately, and the scale factor will change with time, environment and other factors, the scale factor error of the inertial element always exists in the actual system. In addition, due to the principle, process, calibration method and other re...

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): G01C25/00
CPCG01C25/005
Inventor 赵云旭王东升王兴全范玮
Owner 中国船舶重工集团公司第七〇七研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap