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

An online flight test system and its test method

A flight test and tester technology, which is used in the testing of machine/structural components, measuring devices, aerodynamic tests, etc. low impact effect

Active Publication Date: 2022-07-05
NORTHWESTERN POLYTECHNICAL UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems existing in the prior art, the present invention provides an online flight test system and its test method, which solves the problem that the wall shear stress and pressure information cannot be accurately obtained under the online flight state of the aircraft

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
  • An online flight test system and its test method
  • An online flight test system and its test method
  • An online flight test system and its test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The shear stress test node module is electrically connected to the tester in parallel mode, and the stress test node module is electrically connected to the tester in series mode.

[0051] In the parallel mode, each node is individually connected to the tester, and the tester performs excitation and signal processing; in the series mode, the first node is connected to the tester, and subsequent nodes are connected to the previous one one by one. node.

[0052] The serial mode test node includes a flexible substrate, a control unit and a sensing unit. The sensing unit is a piezoresistive, piezoelectric or capacitive pressure sensor. The control unit is used for controlling the signal acquisition of the sensor to be synchronized with the network.

Embodiment 2

[0054] The shear stress test node module is electrically connected to the tester in series mode, and the stress test node module is electrically connected to the tester in parallel mode.

[0055] In the parallel mode, each node is individually connected to the tester, and the tester performs excitation and signal processing; in the series mode, the first node is connected to the tester, and subsequent nodes are connected to the previous one one by one. node.

[0056] The serial mode test node includes a flexible substrate, a control unit and a sensing unit. The sensing unit is a floating type, thermal type or bottom partition type wall shear stress sensor. The control unit is used for controlling the signal acquisition of the sensor to be synchronized with the network.

[0057] In the first embodiment and the second embodiment, a first node fairing and a second node fairing are attached above the shear stress test node module and the pressure test node module, respectively. ...

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 an online flight test system and a measurement method thereof, belonging to the technical field of fluid measurement. The flexible wall shear stress test node and the flexible pressure test node have strong conformal ability, and are installed on the aircraft by means of attachment. The installation method is simple and easy to implement and has little impact on the flow field of the aircraft; the airborne fluid wall shear stress and The pressure synchronization tester is small in size, light in weight, has a large number of sensors that can be connected, and can be controlled by the aircraft flight control system to start and stop, which conforms to the airborne test conditions of the aircraft in flight; The sudden change of the surface structure at the junction of the wall and the node makes the measurement result accurate. The on-line flight test system and the measurement method for the shear stress and pressure of the fluid wall of the present invention provide data support for analyzing the flow state of the boundary layer and evaluating the aerodynamic safety of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of fluid measurement, and in particular relates to an on-line flight test system for shear stress and pressure of a fluid wall and a test method thereof. Background technique [0002] The fluid wall shear stress refers to the tangential stress on the wall due to the viscous action when the fluid flows through the surface of the object. It plays an important supporting role in the aerodynamic design and optimization of new fighters and large transport aircraft. [0003] In addition, the fluid passing over the surface of the aircraft also generates pressure normal to the surface. Due to the extremely complex air flow environment during the flight, the surface pressure changes drastically, in order to determine the position where the aircraft surface has the greatest influence on the fluid state around it, monitor the flight state of the aircraft, and collect the pressure distribution signal on the surface of ...

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): G01M9/06G01L9/08G01L9/12G01L9/06
CPCG01M9/06G01L9/08G01L9/12G01L9/06Y02T90/00
Inventor 罗剑马炳和庞鹏钟思远庄志洪雷航
Owner NORTHWESTERN POLYTECHNICAL UNIV
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