A deformation detection method for aircraft skin on uniform pressure by using speckle image correlation technology

A deformation detection method for aircraft skin on uniform pressure by using speckle image correlation technology
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一种利用散斑图像相关技术的飞机蒙皮均匀压力变形检测方法

DOI:
10.1016/j.measurement.2020.107525
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发表时间:
2020-03
期刊:
影响因子:
5.6
通讯作者:
Wu Jun
Wu Jun
中科院分区:
工程技术2区
文献类型:
--
作者:
Ji Yue;Li Zhan;Liu Liping;Wang Jingjing;Wu Jun

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民用飞机在飞行过程中因增压而产生的蒙皮疲劳裂纹会带来严重的安全隐患。因此,有必要研究均匀压力作用下飞机蒙皮的变形机理。传统的疲劳试验机只能进行简单的拉伸和压缩试验,不能直接应用。提出了一种利用散斑图像相关技术进行变形检测的方法。首先,设计了一台模拟均布压力的疲劳试验机。其次,提出了一种利用改进的KLT(Kanade-Lucas-Tomasi)算法对散斑图像进行相关的方法,以获得涂层散斑的坐标。最后通过静态和动态实验验证了该方法的准确性和有效性。该方法可应用于适航审定中,提高适航审定效率。
The fatigue cracks of aircraft skin which are caused by the pressurization for a civilian airplane during the flight process will bring potential serious safety risks. Therefore, it is necessary to study the deformation mechanism for the aircraft skin on uniform pressure. Traditional fatigue testing machines can only be used for simple tension and compression tests which cannot be applied directly. This paper proposes a deformation detection method by using speckle image correlation technology. Firstly, a fatigue testing machine simulating uniform pressure has been designed. Secondly, a speckle image correlation method by using improved KLT (Kanade-Lucas-Tomasi) algorithm is presented to obtain the coordinates of the coated speckle spots. Finally, static and dynamic experiments were implemented to verify the accuracy and effectiveness of the proposed method. In conclusion, this method can be applied in airworthiness certification to improve the testing efficiency.
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影响因子: --
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