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

Two-degree-of-freedom wind tunnel virtual flight test method

A flight test and degree of freedom technology, which is applied in the cross field of wind tunnel test and flight test, can solve the problems of high risk, long cycle and high cost of lift body flight test, and achieve the effect of low evaluation and verification cost and risk, and reliable verification results.

Inactive Publication Date: 2021-08-13
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high risk, high cost and long cycle of the flight test of the lifting body, the flight test verification can only be carried out in a small amount for the typical state

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
  • Two-degree-of-freedom wind tunnel virtual flight test method
  • Two-degree-of-freedom wind tunnel virtual flight test method
  • Two-degree-of-freedom wind tunnel virtual flight test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 2 As shown, in the real airflow environment of a large-scale wind tunnel, the present embodiment gives the pitch angle command and the roll angle command of the test model through the flight control law of the flight control system. At the same time, the motion parameter measurement equipment measures the pitch angle and pitch angle velocity, roll angle and roll angular velocity of the test model, and transmits them to the flight control system synchronously in real time as the feedback signal of the flight control law. According to the deviation between the real pitch angle and the pitch angle command of the test model, and the deviation between the real roll angle and the roll angle command, the flight control law further gives the deflection command of the rudder surface, generates an appropriate pitch moment on the test model, and drives The pitch and roll movements of the test model make the pitch angle and roll angle of the test model tend to the p...

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 two-degree-of-freedom wind tunnel virtual flight test method. The two-degree-of-freedom wind tunnel virtual flight test method comprises the following steps: step 1, preparing a wind tunnel virtual flight test; 2, releasing the pitching degree of freedom and the rolling degree of freedom of the test model; 3, executing a pitching and rolling maneuvering flight control law; 4, ending single blowing of the wind tunnel virtual flight test; and 5, executing a wind tunnel virtual flight test in a new parameter state. According to the two-degree-of-freedom wind tunnel virtual flight test method, the advantages of real simulation of a flight physical environment, high efficiency, accuracy, low cost and repeatable simulation of a large wind tunnel are fully utilized, and the wind tunnel virtual flight test method suitable for integrated evaluation and verification of pneumatic / motion / control performance of an aircraft is established; the method is an innovative method means besides existing digital modeling simulation, semi-physical simulation and flight test methods, and has important technical support significance for flight control optimization design and performance evaluation of the aircraft.

Description

technical field [0001] The invention belongs to the cross technical field of wind tunnel test and flight test, and in particular relates to a two-degree-of-freedom wind tunnel virtual flight test method. Background technique [0002] At present, the evaluation and verification of aircraft aerodynamic and flight control performance is mainly carried out in a serial manner, and the verification of flight / control performance is basically based on modeling and simulation, and finally the aerodynamic / control performance is verified through flight test evaluation. However, due to the high risk, high cost and long period of the lifting body flight test, flight test verification can only be carried out in a small amount for typical states. [0003] At present, there is an urgent need to develop a two-degree-of-freedom wind tunnel virtual flight test method for integrated evaluation and verification of aircraft aerodynamic / motion / control performance. Contents of the invention [0...

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): G01M9/02G01M9/06B64F5/60
CPCG01M9/02G01M9/06B64F5/60
Inventor 李浩赵忠良李乾周小志王晓冰陈星阳李玉平杨海泳陈建中徐扬帆苗磊
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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