Device and method for conventional balance to measure natural frequency of cantilever supported model in wind tunnel

A technology of natural frequency and balance, applied in the field of measuring device of natural frequency of wind tunnel model, can solve the problems of inaccurate measurement, cumbersome operation, high cost, etc., and achieve the effect of reliable operation, easy operation and improved efficiency

Inactive Publication Date: 2012-07-04
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of cumbersome operation, low efficiency, inaccurate measurement and high cost in the prior art, and provide a device and method for measuring the natural frequency of a cantilever-supported model in a wind tunnel using a conventional balance. Using conventio

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  • Device and method for conventional balance to measure natural frequency of cantilever supported model in wind tunnel
  • Device and method for conventional balance to measure natural frequency of cantilever supported model in wind tunnel

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Embodiment Construction

[0034] Below by specific embodiment and in conjunction with accompanying drawing, the present invention will be further described:

[0035] Such as figure 1As shown, the device for measuring the natural frequency of a cantilever-supported model in a wind tunnel with a conventional balance of the present invention includes a joint, a pole, a conventional balance, a balance lead cable, a model, a signal conditioner, a wind tunnel data acquisition system, and a data acquisition system monitoring computer , rubber hammer, data continuous acquisition software, discrete data spectrum analysis software and cables, wherein the pole is connected to the joint, the conventional balance is installed on the pole, the wind tunnel model is equipped with the conventional balance, and one end of the balance lead-out cable is connected to the conventional balance. One end is connected to the signal conditioner. The signal conditioner is used to process the signal of the conventional bala...

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Abstract

The invention relates to a measuring device for natural frequency of a wind tunnel model and a method utilizing the device to measure, and particularly discloses a device and a method for a conventional balance to measure the natural frequency of a cantilever supported model in the wind tunnel, which aim to solve the problems of the prior art that the operation is complicated, the efficiency is low, the measurement is incorrect and the cost is high. When the cantilever supported model in the wind tunnel is excited by a certain vibration, a damped vibration is produced, at the same time the corresponding component of the balance can sense the vibration signal, the data collecting system and the data collecting software continuously collect the output signals of the conventional balance, and the signal processing software analyzes and processes the component signals of the balance, so as to calculate the natural frequencies of the model and the supporting system. The device and the method sufficiently utilize the wind tunnel conventional testing equipment to calculate the natural frequency of the cantilever supported model, have the characteristics that the operation is convenient, the running is reliable, the efficiency is high, and the value measurement is correct and reliable, and can be applied to all the conventional wind tunnels.

Description

technical field [0001] The invention relates to a device for measuring the natural frequency of a wind tunnel model and a method for measuring it, in particular to a device for measuring the natural frequency of a cantilever-supported model in a wind tunnel using a conventional balance and using the device for measurement Methods. Background technique [0002] The wind tunnel is the cradle for the development of various aerospace vehicles, and most of the aircraft models in the wind tunnel test use the cantilever support method for force measurement and other tests, but the cantilever support model is prone to vibration in the wind tunnel test. Experimental data brings noise and influence. In order to overcome interference and eliminate influence, it is necessary to measure the natural frequency of the model under the state of cantilever support. At present, the method of measuring the natural frequency of the cantilever support model in the domestic wind tunnel is usually...

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Application Information

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IPC IPC(8): G01H1/06G01H1/14G01M9/02
Inventor 谢艳吴军强李平易凡范长海蒋鸿薛江平王春唐亮孙宁钟世东师建元毛代勇郭秋亭金志伟
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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