Algorithm of typical rotor shape parameters by micro-Doppler laser detection

被引：0

作者：

Wang Y. ^{[1
]}

Hu Y. ^{[1
]}

Lei W. ^{[1
]}

Guo L. ^{[1
]}

机构：

[1] State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology, Hefei

来源：

| 2018年 / Chinese Society of Astronautics卷 / 47期

关键词：

Laser detection; Micro-Doppler effect; Shape parameter; Time-frequency analysis; Typical rotor;

D O I：

10.3788/IRLA201847.0906003

中图分类号：

学科分类号：

摘要：

In order to realize the remote sensing detection classification and identification of the rotor, the laser echo feature of extended rotor target based on micro-Doppler effect was studied. The micro-Doppler coherent laser echo model of moving extended rotor was built with the panel method of physical optics. Angular scattering characteristics of laser were analyzed and calculated, which proved that rotor had the same echo reflectivity everywhere under the far field condition. Laser detection echo of three typical rotor shapes was simulated, and the time-frequency features of extended rotor were achieved by Smooth Pseudo Wegener-Villy (SPWV) transform. The electromagnetic scattering mechanism confirms that each frequency band was related to the shape of the rotor, and the number of blades does not affect the expression of features of rotor shape in time-frequency figure as well as the moving velocity. The laser detection calculation methods of rotor shape parameters, including aspect ratio, root-tip ratio and sweep angle of rotor tip, were proposed and proved to be correct through simulation, which layed the foundation for rotor identification. © 2018, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.

引用

共 14 条

[1]

Chen V.C., Micro-Doppler effect of micromotion dynamics: a review, Proceedings of SPIE-The International Society for Optical Engineering, 5102, pp. 240-249, (2003)

[2]

Marple S.L., Large dynamic range time-frequency signal analysis with application to helicopter Doppler radar data, Signal Processing and ITS Applications, Sixth International, Symposium On. IEEE Xplore, pp. 260-263, (2001)

[3]

Chen V.C., Li F., Ho S.S., Et al., Micro-Doppler effect in radar: phenomenon, model, and simulation study, IEEE Transactions on Aerospace & Electronic Systems, 42, 1, pp. 2-21, (2006)

[4]

Setlur P., Ahmad F., Amin M., Helicopter radar return analysis: Estimation and blade number selection, Signal Processing, 91, 6, pp. 1409-1424, (2011)

[5]

Clemente C., Soraghan J.J., GNSS-based passive bistatic radar for micro-doppler analysis of helicopter rotor blades, Aerospace & Electronic Systems IEEE Transactions On, 50, 1, pp. 491-500, (2014)

[6]

Jiang X., Zhao Q., Meng C., Et al., Effect of helicopter roter blade shape on its radar signal characteristics, Acta Aeronautica et Astronautica Sinica, 35, 11, pp. 3123-3136, (2014)

[7]

Chen P., Hao S., Zhao N., Et al., Micro-Doppler analysis of helicopter忆s rotor blades, Infrared and Laser Engineering, 42, 12, pp. 3259-3264, (2013)

[8]

Dong J., Chen R., Li X., Et al., Lidar coherent detection and feature ettraction of moving target based on micro-Doppler effect, Chinese Journal of Lasers, 39, 10, pp. 199-202, (2012)

[9]

Zhang Z., Li T., Yang X., The mathematical model of the target transient response of laser scattering, Journal of Detection & Control, 29, 5, pp. 63-66, (2007)

[10]

Seddon J., Basic Helicopter Aerodynamics, pp. 74-78, (2011)

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