Method for suppressing wind tunnel model vibration based on vision measurement technology

A visual measurement and wind tunnel technology, applied in the field of wind tunnel experiments, can solve problems such as difficulty in model vibration suppression, avoid interference of vibration measurement signals, improve the effect of vibration suppression, and control stability

Active Publication Date: 2017-06-27
DALIAN UNIV OF TECH
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Problems solved by technology

Because the system has the characteristics of high reliability and robustness, it solves the difficult problem of suppressing the vibra

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  • Method for suppressing wind tunnel model vibration based on vision measurement technology
  • Method for suppressing wind tunnel model vibration based on vision measurement technology
  • Method for suppressing wind tunnel model vibration based on vision measurement technology

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Embodiment Construction

[0040] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0041] figure 1 It is a schematic diagram of the construction of the entire wind tunnel model strut vibration suppression hardware system based on visual measurement. During the implementation process, the method of pasting LED point light sources on the surface of the wind tunnel model is used to realize the preparation of self-illuminating markers. The EoSens produced by the German Mikrotron Camera Company is selected. The 25CXP model industrial camera is aimed at the self-illuminating mark point, and the frame rate of the industrial camera is 500fps at 4 megapixels. A NikonAF-S Nikkor 24-70mm f / 2.8G ED lens is used to connect to an industrial camera and aim at self-illuminating markers to shoot vibration images. The FPGA image acquisition card is the microEnable 5 ironman CXP series acquisition card launched by ...

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Abstract

The invention provides a method for suppressing wind tunnel model vibration based on vision measurement technology, belongs to the technical field of wind tunnel experiments, and relates to a system and method for suppressing wind tunnel vibration in a wind tunnel test. The method adopts an industrial camera to shoot a vibration image of a wind tunnel model, and utilizes image high-speed real-time processing transmission technology of an FPGA vision measurement system to calculate a vibration displacement signal and converts the signal into an analog quantity to be fed back to a controller. The controller outputs a control signal, and through power amplification, realizes control of a piezoelectric ceramic actuator so as to achieve the purpose of active suppression of wind tunnel model vibration. The method adopts an FPGA-based vision measurement mode to measure a vibration signal of a wind tunnel model as a feedback signal for controlling the actuator to work, thereby effectively preventing interference of a high-voltage piezoelectric ceramic drive signal to a vibration measurement signal and hysteresis of an input signal generated by a filter. The method enables the control of the actuator to be stable and accurate, and improves an effect of suppressing wind tunnel model vibration.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel experiments, and relates to a system and method for suppressing vibration of a wind tunnel model in wind tunnel experiments based on visual measurement technology. Background technique [0002] The wind tunnel experiment is based on the principle of relativity of motion. The model or object of the aircraft is fixed in the artificial environment on the ground, and the air flow is artificially created to simulate various complex flight states in the air and obtain experimental data. It is a modern aircraft development and important part of production. [0003] In wind tunnel experiments, the wind tunnel model generally adopts the tail support method. The tail of the model is connected to the force measuring balance and the support rod, and the tail of the support rod is fixed on the machete. The wind tunnel model-balance-support rod system forms a typical cantilever beam structure. This kind o...

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Application Information

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IPC IPC(8): G01M9/04G01M9/06G05D27/02
CPCG01M9/04G01M9/062G05D27/02
Inventor 刘巍姜雨丰袁晓晶周孟德张家昆刘惟肖鲁继文贾振元
Owner DALIAN UNIV OF TECH
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