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Mach number controller in wind tunnel

A Mach number and controller technology, which is applied in the field of wind tunnel Mach number controllers to achieve the effects of improving efficiency, improving test efficiency and saving air sources

Active Publication Date: 2010-11-17
JIANGSU XINPENG HEAVY ELECTROMECHANICAL MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the relevant controllers are not universal, and need to be designed and debugged according to the specific wind tunnel conditions

Method used

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  • Mach number controller in wind tunnel
  • Mach number controller in wind tunnel
  • Mach number controller in wind tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] See Figure 3-6 , the wind tunnel Mach number controller of the present embodiment includes: an industrial PC, an ISA bus connected to the industrial PC, an analog output control circuit used to control the pressure regulating valve and a fast valve connected to the ISA bus, connected to the ISA The data acquisition circuit connected to the bus is used to obtain air pressure, temperature, pressure regulating valve opening and multiple aerodynamic parameters acting on the test model, and the circuit connected to the ISA bus is used to control the attitude of the test model by controlling the angle of attack mechanism. Switch input and output circuits.

[0017] In the start-up stage of the wind tunnel test, the fuzzy control method with self-adjusting factor is used to control the Mach number of the airflow in the test section of the wind tunnel. When the actual Mach number Ma of the airflow in the test section is ≤ 3ΔMW, the PID control method is used instead Control th...

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Abstract

The invention relates to a mach number controller in a wind tunnel with higher characteristics and flow field precision. Firstly, a fuzzy control method with self-adjusting factors is adopted to control the mach number of the air stream in the test section of the wind tunnel in the starting stage of the test of the wind tunnel, when the actual mach number Ma of the air stream in the test stage is not more than 3 DeltaMW, a PID control method is adopted to control the mach number of the air flow in the test stage; secondly, when an industrial PC (personal computer) judges that the actual mach number Ma is within the DeltaMW for five successive times and an attack angle of the test model is in place, namely, the condition of the test model is arranged in the preset condition, the industrial PC acquires a plurality of air power parameters acted on the test model by a data acquisition circuit; , the test model is controlled to be changed to the next attack angle, and / or the air stream in the test stage is controlled to be changed to the next mach number, and the control of the mach number and the acquisition process of the air power parameter data are repeated.

Description

technical field [0001] The invention relates to the technical field of wind tunnel airflow control, in particular to a wind tunnel Mach number controller. Background technique [0002] A wind tunnel is a pipeline test device that can artificially generate and control airflow to simulate the flow of air around an aircraft or object, measure the effect of airflow on an object, and observe the phenomenon of an object. In short, a wind tunnel is a device that uses power equipment to drive a speed-controlled airflow in a pipeline to perform aerodynamic experiments on models. Wind tunnel originated from the development needs of aerospace technology, plays a very important role in aerodynamic research and aircraft design, and has been widely used in industrial and architectural fields. [0003] The high-speed wind tunnel is mainly composed of air compressor, gas storage system (air source), wind tunnel, control and testing system. The control and test system is composed of Mach n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P80/10Y02P90/02
Inventor 罗印升邢绍邦宋伟陈太洪高倩沃松林包伯成
Owner JIANGSU XINPENG HEAVY ELECTROMECHANICAL MFG
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