Real-time measurement method of deformation of test piece free end in wind tunnel test

A technology of real-time measurement and wind tunnel test, applied in the direction of measuring device, aerodynamic test, machine/structural component test, etc., to achieve the effect of simple operation process, improved test efficiency, and convenient and quick use

Active Publication Date: 2017-12-19
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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Problems solved by technology

[0003] The object of the present invention is to provide a kind of test piece free end deformation real-time measu

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  • Real-time measurement method of deformation of test piece free end in wind tunnel test
  • Real-time measurement method of deformation of test piece free end in wind tunnel test

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[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. The embodiments of the present invention ...

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Abstract

The invention discloses a real-time measurement method of the deformation of a test piece free end in a wind tunnel test, relating to the technical field of aircraft aeroelasticity. The method concretely comprises a step of selecting a reference point at a free end of a test piece, installing a first camera and a second camera at a side wall and a top in a wind tunnel by reference to the reference point, and setting a first mark tag and a second mark tag at side walls opposite to the first camera and the second camera, a step of applying external force to the test piece such that the test piece is in vertical deformation and horizontal deformation, recording positions of the reference point on the first mark tag and the second mark tag viewed through the first camera and the second camera, and a step of carrying out a blowing test on the test piece, measuring relative positions of the reference point in the first mark tag and the second mark tag through screen captures, and calculating the actual deformation of the test piece. The method has the advantages of simple operation and convenience in use, and the measurement precision can meet the requirements of the engineering.

Description

technical field [0001] The invention relates to the technical field of aircraft aeroelasticity, in particular to a method for real-time measurement of the free end deformation of a test piece in a wind tunnel test. Background technique [0002] In conventional wind tunnel tests, the deformation of the free end of the test piece is rarely measured; even if there is a large amount of deformation, it is simply evaluated by visual inspection, and the error is relatively large. For large flexible test pieces, the amount of wingtip deformation is an important index for nonlinear analysis. It is necessary to simulate the large deformation of the aircraft in the air in advance in the ground test, find out the inherent characteristics of the aircraft in the state of large deformation, and ensure flight safety. Contents of the invention [0003] The purpose of the present invention is to provide a real-time measurement method for the deformation of the free end of the test piece in...

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Application Information

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IPC IPC(8): G01B11/16G01M9/06
CPCG01B11/16G01M9/06
Inventor 胡志勇唐矗党云卿蒲利东陈海
Owner XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
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