Gravity-assisted navigation route planning method

An auxiliary navigation and track planning technology, applied in navigation, surveying and navigation, navigation calculation tools, etc., can solve the problems of inability to give quantitative relationship of matching positioning accuracy, poor intuition, poor reliability, etc.

Active Publication Date: 2018-06-29
TIANJIN NAVIGATION INSTR RES INST
View PDF5 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these algorithms use artificially set empirical indicators as the threshold of evaluation criteria, which are highly random and cannot guarantee the matching and positioning accuracy of the screene

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
  • Gravity-assisted navigation route planning method
  • Gravity-assisted navigation route planning method
  • Gravity-assisted navigation route planning method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0114] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0115] The purpose of trajectory planning is to select the trajectory with the highest matching accuracy. The background technology is the gravity field database adaptability analysis and evaluation method. The gravity matching accuracy estimation formula obtained by this evaluation method is,

[0116] As shown in the following formula:

[0117]

[0118] In order to establish the trajectory planning algorithm, it is first necessary to analyze the matching accuracy estimation formula to find out the parameters that affect the matching accuracy. Among the parameters appearing in the above formula:

[0119] Matching time length T p , is related to the length X of the planned track and the speed V, T p =X / V;

[0120] The divergence value δ of the inertial navigation positioning error during the matching period is related to the length X of the pl...

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 gravity-assisted navigation route planning method. The gravity-assisted navigation route planning method is technically characterized by comprising the following steps: step1, acquiring a gravity anomaly background image of an adaptive region and an error standard deviation gm thereof through investigation and survey; investigating and surveying performance parameters of all configuration equipment of an inertia/gravity combined navigation system; step 2, finishing configuration and traversing of various possible random routes by utilizing a searching-traversing route algorithm; step 3, calculating a gravity measurement error standard deviation gc and a matching duration inertial guidance positioning error diffusion value delta of all alternative routes; step 4,calculating pre-estimating matching and positioning precision of all the alternative routes, wherein the alternative route with the highest matching and positioning precision is used as a planned route in the adaptive region. According to the gravity-assisted navigation route planning method provided by the invention, an underwater gravity measurement process is simulated by utilizing a gravity measurement error model, and a working condition of underwater navigation of a carrier is stimulated by utilizing an inertial guidance positioning error resolving method; an underwater matching workingcondition can be realized, so that the reliability of the screened paths is ensured.

Description

technical field [0001] The invention belongs to the technical field of inertial / gravity combined navigation, and relates to a track planning method, in particular to a gravity-assisted navigation track planning method. Background technique [0002] Gravity-assisted navigation track planning refers to selecting a track suitable for inertial / gravity integrated navigation in the ocean, and the integrated navigation system performs matching and positioning calculations on this track, which can give high-precision position information, thereby Realize the readjustment and correction of inertial navigation. [0003] At present, commonly used track planning methods such as the A* algorithm mostly use water depth data and gravity characteristic statistics as evaluation criteria for track selection. Most of these algorithms use artificially set empirical indicators as the thresholds of evaluation criteria, which are highly random and cannot guarantee the matching and positioning acc...

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
CPCG01C21/165G01C21/20
Inventor 张辰马林赵晶睛李晓平周贤高张桂敏
Owner TIANJIN NAVIGATION INSTR RES INST
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