Method of air coarse alignment based on straight-line trajectory

A coarse alignment, straight line technology, applied in the field of inertial navigation system and initial alignment, can solve the problems of real-time and reliability impact of initial alignment of inertial navigation system, initial alignment troubles, etc., to reduce the static time before takeoff , the effect of improving flight efficiency

Active Publication Date: 2018-12-14
中科宇达(北京)科技有限公司
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the current ship-borne UAV inertial navigation system, it is facing the problem of the initial alignment caused by the shaking of the ship at sea, and the app...

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
  • Method of air coarse alignment based on straight-line trajectory
  • Method of air coarse alignment based on straight-line trajectory
  • Method of air coarse alignment based on straight-line trajectory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] The present disclosure provides a method for coarse alignment in the air based on a straight track, which solves the problem that the initial alignment of the inertial navigation system of a ship-borne UAV is affected by wave fluctuations, and distinguishes the take-off and take-off of the UAV by speed threshold isolation. Straight-line operation process; reduce the static time before take-off due to the alignment of the inertial navigation system of the ship-borne UAV, and use the aircraft to accelerate the straight-line flight process to complete the alignment of the initial attitude, which greatly improves the flight efficiency.

[0038] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0039] In a first exemplary embodiment of the present disclosure, a method for ...

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 discloses a method of air coarse alignment based on a straight-line trajectory. The method of the air coarse alignment based on the straight-line trajectory comprises the steps that an air coarse alignment triggering condition is established; after real-time speed of an unmanned aerial vehicle meets the air coarse alignment triggering condition, the unmanned aerial vehicle is required to navigate in a straight line, real-time trajectory angle information is obtained; and an effective sampling point is judged to calculate a level attitude angle by using a reliability assessment index of the straight-line trajectory, and coarse alignment is completed. According to the method of the air coarse alignment based on the straight-line trajectory, the problem that initial alignment ofa ship-borne unmanned aerial vehicle inertial navigation system is affected by sea wave fluctuating is solved, and the lifting, takeoff and straight-line operation process of the unmanned aerial vehicle are distinguished through speed threshold isolation; rest time before takeoff required for the alignment of the ship-borne unmanned aerial vehicle inertial navigation system is reduced, the alignment of initial attitude is completed by using an aircraft accelerated straight-line flight process, and the flight efficiency is well improved.

Description

technical field [0001] The disclosure belongs to the technical field of inertial navigation systems and initial alignment, and relates to a method for coarse alignment in the air based on straight track. Background technique [0002] The initial alignment technology is one of the key technologies of the inertial navigation system. The quality of the initial alignment technology will directly affect the navigation accuracy of the system. Therefore, it has important theoretical and practical significance to improve the initial alignment technology of the inertial navigation system. [0003] The traditional initial alignment methods of inertial navigation mainly include: 1) static alignment on the ground, which is mainly suitable for land vehicle equipment, and this method is mostly used in domestic and foreign products; 2) dynamic base alignment, mainly for marine equipment, but Restricted by factors such as wave size and ship load; 3) Global satellite positioning system (GNSS...

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 董勇伟杨振礼
Owner 中科宇达(北京)科技有限公司
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