Flutter test safety protection system and method

A technology of safety protection and safety protection device, which is applied in the field of aviation aerodynamic wind tunnel test, can solve problems such as component damage, model fracture, model damage, etc., and achieve the effects of preventing damage, reducing model weight, and reducing control difficulty

Inactive Publication Date: 2020-10-30
AVIC SHENYANG AERODYNAMICS RES INST
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of model fracture or model damage causing damage to some components in the wind tunnel due to excessive vibration of the test model, the present invention proposes a flutter test safety protection system and method. The specific technical scheme is as follows:

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
  • Flutter test safety protection system and method
  • Flutter test safety protection system and method
  • Flutter test safety protection system and method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0033] Embodiment 1: A safety protection system for a flutter test includes a test model, an acceleration sensor, a safety protection device, a wind tunnel control module, a data acquisition and analysis module, a fast electromagnetic valve, a flow regulating valve, and a test section; wherein the wind tunnel control module , The data acquisition and analysis module and the solenoid valve are outside the wind tunnel; the flow regulating valve, safety protection device, acceleration sensor and test model are all inside the wind tunnel;

[0034] The wind tunnel control module controls the connection to the data acquisition and analysis module, and one end establishes a wireless communication connection with the flow safety valve;

[0035] The flow safety valve is installed at the air inlet of the wind tunnel, and is set in the wind tunnel in parallel with the experimental model and safety protection device;

[0036] At least one acceleration sensor is installed on the test model...

specific Embodiment approach 2

[0038] Specific implementation mode two: according to the system composition described in specific implementation mode one, combined with the attached Figure 1-3 The implementation process of a specific method for the safety protection of the flutter test is as follows:

[0039] By monitoring the value of the acceleration sensor on the test model and calculating and analyzing it, the safety protection device is used to protect the test model during the flutter test to prevent damage to the model itself or the internal components of the wind tunnel caused by the excessive vibration of the test model. damage.

[0040] Take a certain test as an example, before the flutter test in the wind tunnel:

[0041] (a) Install an acceleration sensor on the test model;

[0042] (b) Connect the data acquisition and analysis module to the wind tunnel control module through Ethernet, and connect to the safety protection device through the fast solenoid valve [3];

[0043] (c) Put the safet...

specific Embodiment approach 3

[0054] Specific implementation mode three: According to specific implementation mode two, a flutter test safety protection system also includes system judgment for execution protection, and the process is as follows:

[0055] After the data calculation of a cycle is completed, proceed as follows:

[0056] (a) When m≤3, and the wind tunnel control module does not send a signal to the data acquisition and analysis module to stop the test, then clear m to zero, and continue to collect 100 signals of the next cycle for calculation;

[0057] (b) When m≤3, but the wind tunnel control module sends a signal to the data acquisition and analysis module to stop the test, the acquisition will not continue, and the data acquisition and analysis module will control the safety protection device through the fast solenoid valve to perform the clamping operation of the test model, At the same time, the wind tunnel control module closes the flow regulating valve and stops the test.

[0058] (c)...

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 a flutter test safety protection method, belongs to the technical field of aviation aerodynamic wind tunnel tests, and aims to solve the problem of damage to a model or internal parts of a wind tunnel caused by excessive vibration of a test model in the wind tunnel flutter test process. According to the method, the flow field stability condition is monitored through a dataacquisition and analysis module when a wind tunnel control module starts a test, the value of an acceleration sensor on the test model is monitored, calculation and analysis are carried out, a safetyprotection device is used to carry out safety protection on the model, the control difficulty of the aircraft in the pneumatic simulation flight test is reduced, the control efficiency is improved, the problems of large size of a development board and occupation of model space are solved, the weight of the model is effectively reduced, and the development difficulty is greatly reduced.

Description

technical field [0001] The invention relates to a flutter test safety protection system and method, in particular to the protection of a test model and internal components of a wind tunnel, and belongs to the technical field of aviation aerodynamic wind tunnel tests. Background technique [0002] It is mainly used for safety protection of test models and wind tunnels. In wind tunnel flutter tests, due to the need to observe severe critical states, damage to the model is likely to occur. Usually, a protective net is arranged downstream of the test section to prevent the falling model from damaging the wind tunnel. This patent uses the active control safety protection technology to judge the model status in real time through the acceleration sensor readings. Once the model vibration diverges, the safety protection system will be activated to protect the test model and wind tunnel, which is more convenient, efficient and reliable. [0003] The purpose of the invention is to de...

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): G01M9/02G01M9/04G01M9/00
CPCG01M9/02G01M9/04G01M9/00
Inventor 郭晋刘南刘昱王冬于贤鹏杨希明
Owner AVIC SHENYANG AERODYNAMICS RES INST
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