Wing vibration detection device and method based on three-dimensional digital speckle correlation method

Abstract

The invention discloses a wing vibration detection device and a wing vibration detection method based on a three-dimensional digital speckle correlation method. The wing vibration detection device comprises a wing body part, a vibration detection part, a vibration excitation part and a computer, wherein the wing body part comprises a wing and a thin film painted with dense spots; the vibration detection part comprises two high-speed cameras and a camera bracket; the vibration excitation part comprises an exciter, a power amplifier and a signal generator; the vibration excitation part conducts vibration excitation on the wing body part, so that the surfaces of the wing deform accordingly; the vibration detection part performs synchronous and continuous image acquisition in the wing surface scope displaying the dense spots; the acquired images are transmitted to the computer, displacement information data obtained through corresponding image registration and by adopting the three-dimensional digital speckle correlation method is imported into relevant processing software, three-dimensional curved surface fitting operation is conducted on the displacement information data, so as to display the morphology during wing vibration or deformation, thereby realizing visualized operation.

Description

technical field [0001] The invention relates to the field of positioning and vibration detection of flexible structures, in particular to a wing vibration detection device and method based on a three-dimensional digital speckle correlation method. Background technique [0002] The size of the aspect ratio has a significant impact on the flight performance of the aircraft. When the aspect ratio increases, the induced drag of the wing will decrease, which can improve the maneuverability of the aircraft and increase the subsonic range. The aspect ratio also affects the lift generated by the wing. If the wing area is the same, as long as the aircraft is not close to a stall state, the lift generated by the wing with a large aspect ratio is also large under the same conditions, thus reducing the take-off and landing of the aircraft. Rolling distance and improved maneuverability. High-altitude and long-endurance aircraft require a long time in the air and a long range, so most o...

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Problems solved by technology

[0005] The purpose of the present invention is to address the shortcomings and deficiencies of the prior art, and to provide a wing vibration detection device based on a three-dimensional digital speckle correlation method. To solve the problem of real-time acquisition of displacement information of measured points during wing vibration and deformat...

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