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

New ejection delivery speed measurement method for ejection seat

An ejection seat and velocity measurement technology, which is applied in ejection/disembarkation devices, aircraft component testing, etc., can solve problems such as the inability to know the initial value and the inability to perform integral operations, and achieves a small error, short cycle, and low cost. Effect

Inactive Publication Date: 2020-02-18
SHENYANG AEROSPACE UNIVERSITY
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the independence of the measurement, that is, if the relevant data is not obtained from the aircraft data bus, the initial value cannot be known, so the integral operation cannot be performed

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
  • New ejection delivery speed measurement method for ejection seat
  • New ejection delivery speed measurement method for ejection seat
  • New ejection delivery speed measurement method for ejection seat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] Such as figure 1 As shown, the method of this embodiment is as follows.

[0030] Step 1: Divide the ejection seat ejection process into two stages, establish a mathematical model according to the specific conditions of each stage, and compile a computer simulation calculation program;

[0031] The first stage: the ejection seat is stuck in the guide rail groove by two pairs of pulleys, and the ejection seat system can only move along the direction of the guide rail and cannot rotate. At this time, the ejection seat system is affected by the thrust and gravity of the rocket package;

[0032] The second stage: the ejection seat only has a pair of pulleys in the ejec...

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 new ejection delivery speed measurement method for an ejection seat, and belongs to the technical field of aviation ejection life-saving. According to movement characteristics of the ejection seat, based on a computer simulation method, a mapping relation model of body axis x-direction acceleration value and ejection velocity of the ejection seat based on a BP neural network is established in advance; a body axis x-direction acceleration sensor is mounted in an appropriate position of the ejection seat, and the body axis x-direction acceleration value of the ejectionseat at that moment of delivery is measured; and the corresponding ejection delivery speed is calculated on the basis of the acceleration value according to the mapping relation model which is established in advance. According to the method, the probability of inaccurate measurement caused by blockage of an airspeed head and influence of an external flow field is avoided, slight errors are produced, and engineering application requirements are met.

Description

technical field [0001] The invention relates to the technical field of aviation ejection lifesaving, in particular to a novel ejection seat ejection speed measurement method. Background technique [0002] The ejection seat is the main life-saving equipment for the pilot to get out of the aircraft in an emergency. With the expansion of the flight envelope of fighter jets, the ejection seat must meet the life-saving requirements under a wide range of ejection speeds and ejection heights. Therefore, the division of ejection modes according to different ejection conditions has become the key technology of the third-generation ejection seat. The principle is to measure the ejection speed and height when the ejection is started by the sensor, and determine the opening time of the lifesaving parachute according to the pre-set program control mode. The main types of ejection seats in active service are equipped with pitot tubes to measure the velocity value at the moment of ejecti...

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 Applications(China)
IPC IPC(8): B64F5/60B64D25/10
CPCB64F5/60B64D25/10
Inventor 毛晓东白庭蝶冯晓晗庞丽萍
Owner SHENYANG AEROSPACE UNIVERSITY
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