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利用纵向加速度和连续小波变换检测飞机着陆。

Detection of Aircraft Touchdown Using Longitudinal Acceleration and Continuous Wavelet Transformation.

机构信息

Frenchay Campus, The University of the West of England, Coldharbour Lane, Bristol BS16 1QY, UK.

Department of Avionics and Control Systems, Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland.

出版信息

Sensors (Basel). 2020 Dec 17;20(24):7231. doi: 10.3390/s20247231.

DOI:10.3390/s20247231
PMID:33348653
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7766698/
Abstract

The paper presents a methodology enabling the detection of aircraft touchdowns based on data obtained from accelerometers attached to the structural parts of the airframe in the cockpit or passenger compartment. Precise determination of the moment and place of touchdown of the main landing gear is challenging when analysing parameters such as height, flight speed and rate of descent. During the tests of the I-31T aircraft, it turned out that vibrations of the aircraft structure caused by the contact of the front and main landing gear with the ground have a repetitive character. In particular, this applies to longitudinal acceleration. The use of continuous wavelet analysis (CWT) allowed finding unique periodic features of the landing phenomenon that distinguish it from other forms of vibration occurring in individual flight phases. Ground and flight observations of experimental aeroplane MP-02 Czajka verified the proposed method of virtual touchdown detection. The results presented in this paper justify that this method may find broader application, especially for the light aircraft class.

摘要

本文提出了一种基于安装在驾驶舱或客舱机体结构部件上的加速度计获取的数据来检测飞机触地的方法。在分析高度、飞行速度和下降率等参数时，精确确定主起落架的触地点和触地时刻具有挑战性。在 I-31T 飞机的测试中，事实证明，由于前起落架和主起落架与地面接触而引起的飞机结构振动具有重复性特征。特别是，这适用于纵向加速度。使用连续小波分析 (CWT) 可以找到着陆现象的独特周期特征，将其与在各个飞行阶段发生的其他振动形式区分开来。对实验飞机 MP-02 Czajka 的地面和飞行观测验证了所提出的虚拟触地检测方法。本文提出的方法可以找到更广泛的应用，特别是对于轻型飞机类别。

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本文引用的文献

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Wavelet-Variance-Based Estimation for Composite Stochastic Processes.基于小波方差的复合随机过程估计
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