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

Method for determining initial attitude angle of aircraft

A technology for initial attitude angle and determination method, which is applied in the direction of instruments, satellite radio beacon positioning systems, measuring devices, etc., can solve the problem of unsuitability of small aircraft, achieve reduction of various magnetic interference, easy engineering implementation, and high real-time performance Effect

Active Publication Date: 2014-07-02
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Use GPS to measure the attitude, and use the GPS carrier phase to determine the attitude in the air. Since this method requires more than two antennas to determine the attitude, and the baseline length must have a certain distance, this method is generally suitable for space determination of aircraft with a large space. It is not suitable for small aircraft (see Li Xuetao's doctoral thesis "Research on Dual-antenna GPS / SINS Integrated Navigation System" of Nanjing University of Aeronautics and Astronautics in 2008)

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 for determining initial attitude angle of aircraft
  • Method for determining initial attitude angle of aircraft
  • Method for determining initial attitude angle of aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further introduced below in conjunction with the accompanying drawings.

[0024] After the small aircraft is powered on in the air, it cannot obtain the initial attitude information of the projectile body, and needs to determine the attitude in the air through the control system. Since the GPS can obtain the three-way velocity v in the North East sky coordinate system N , v U , v E . With the improvement of the device level, the calculation speed and data refresh rate of GPS receivers are also continuously improved. At present, the data refresh rate of GPS receivers can reach 10-100Hz. Generally speaking, the positioning speed deviation of GPS receivers is very small, about 0.2m Within / s, the present invention utilizes the relatively accurate characteristics of the positioning relative speed of the GPS receiver to obtain initial pitch attitude angle and yaw attitude angle information. The initial roll attitude angle information will ine...

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 for determining an initial attitude angle of an aircraft, and the method comprises the following steps of: calculating a pitch attitude angle phi and a yawing attitude angle psi according to speed information obtained by a GPS (Global Positioning System) receiver; obtaining geomagnetic information My1 and Mz1 by virtue of a double-shaft geomagnetic sensor; and calculating a rolling attitude angle gamma according to the formula gamma=-a*tan2(Mz1, My1)+a*tan2(sin(psi+alpha), cosphi*tanbeta-sinphi*cos(psi+alpha), wherein alpha and beta are a magnetic declination angle and a magnetic inclination angle of the current position of the aircraft, respectively. The method, provided by the invention, is low in cost, simple and high in precision, and can be used for realizing the air attitude measurement of a small aircraft.

Description

technical field [0001] The invention relates to a method for determining an attitude angle. Background technique [0002] After the small high-dynamic aircraft (hereinafter referred to as the aircraft) is powered on in the air, the navigation system needs to independently identify the initial attitude information and complete the attitude determination in the air before subsequent navigation calculations can be performed. However, due to the characteristics of high overload and small volume, the attitude determination of the aircraft in the air can only be completed by MEMS devices. However, MEMS inertial devices have disadvantages such as large drift and low precision. [0003] At present, domestic articles use the geomagnetic method for aerial attitude recognition. For example, Cao Hongsong of North University of China and others proposed a geomagnetic sensor chip and a silicon micro-gyroscope to construct a low-cost attitude detection system, which can obtain higher-pre...

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): G01S19/53G01C21/08
Inventor 施国兴巩庆海吕新广孙友
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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