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

Aircraft test fresh air control system and control method

A technology of control system and fresh air, which is applied in the direction of aircraft component testing, etc., can solve the problems that cannot meet the needs of aircraft engine testing, and achieve the effects of uniform and stable supply, stable temperature and stable operation

Active Publication Date: 2022-02-18
CHINA AIRPLANT STRENGTH RES INST
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: the existing technology cannot meet the needs of my country's aircraft laboratory for aircraft engine testing under extremely low temperature conditions

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
  • Aircraft test fresh air control system and control method
  • Aircraft test fresh air control system and control method
  • Aircraft test fresh air control system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] This embodiment is an aircraft test fresh air control system, comprising:

[0079] gas subsystem, such as figure 1 As shown, the supplementary air subsystem includes: a compensation air duct 1 for introducing outdoor air into the aircraft climate laboratory, a liquid nitrogen heat exchanger 2 connected with the compensation air duct 1 for cooling the outdoor air, and a liquid nitrogen heat exchanger 2 connected with the liquid nitrogen The heat exchanger 2 is connected to the air supply duct 3 for sending low-temperature air into the room. The air supply duct 3 is located outside the aircraft climate laboratory and communicates with the aircraft climate laboratory. The air supply duct 3 is provided with a damper 13, which also The control module located in the aircraft climate laboratory with local manual control and remote automatic control functions, the temperature monitoring module for monitoring the temperature of the supply air, the humidity monitoring module for ...

Embodiment 2

[0089] This embodiment is a method for controlling fresh air in aircraft tests based on Embodiment 1, such as Figure 8 shown, including the following steps:

[0090] S1. Before the test starts, the control system is powered on, and the liquid nitrogen inlet switch valve 11 and the nitrogen discharge switch valve 19 are opened;

[0091] S2, docking the liquid nitrogen tanker 12 with the liquid nitrogen heat exchanger 2, and adjusting the supply pressure of the liquid nitrogen tanker 12 to 4 Bar;

[0092] S3, start the nitrogen dilution fan 8;

[0093] S4. The tester's mobile device is connected to the system through the wireless networking sub-module, and then the temperature setting sub-module is used to set the compensation air temperature target value , the PLC controller controls the frequency conversion compensation fan 5 to start at a low speed, and obtains the fresh air temperature at the outlet of the liquid nitrogen heat exchanger 2 through the temperature sensor a...

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 provides an aircraft test fresh air control system and a control method, and relates to the technical field of aircraft test. The fresh air control system for the aircraft test includes: an air supply subsystem, and the air supply subsystem includes: a compensation air duct, a liquid nitrogen heat exchanger, and an air supply duct. The aircraft test fresh air control method includes the following steps: S1. Electricity; S2, docking the liquid nitrogen tanker and liquid nitrogen heat exchanger; S3, starting the nitrogen dilution fan; S4, setting the air temperature target value and adjusting it; S5, maintaining the balance of air supply and exhaust; S6, judging the liquid nitrogen heat exchange The device is frosted and defrosted; S7, further test; S8, prompt alarm when the liquid nitrogen tanker needs to be replaced; S9, the test is completed. The present invention solves the problem that the prior art cannot meet the test requirements of the aircraft laboratory for the whole aircraft engine under extremely low temperature conditions, and has the advantages of real-time flow monitoring and PID / Bang-Bang combined temperature control.

Description

technical field [0001] The invention relates to the technical field of aircraft testing, in particular to an aircraft testing fresh air control system and a control method. Background technique [0002] In order to give full play to the combat effectiveness of weapons and equipment, it is necessary to test the environmental adaptability requirements and evaluation index system of military aircraft to make it better adapt to the complex and diverse environments of our country. [0003] Especially the aircraft test in extremely low temperature environment is essential. In a low-temperature environment, ice tends to accumulate on the leading edge of the wings and tail of the aircraft, resulting in deformation, resulting in reduced lift and increased drag. Ice accumulation in the dynamic and static pressure holes of the aircraft will cause instrument distortion and affect the pilot's judgment. After the impact, it may directly cause an aircraft crash and cause casualties. There...

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): B64F5/60
CPCB64F5/60
Inventor 王彬文吴敬涛成竹杜文辉李闯勤
Owner CHINA AIRPLANT STRENGTH 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