Estimation Method for Instantaneous Frequency of Echo Signal of Projectile in Bore

doi:10.3969/j.issn.1000-1093.2017.09.018

Abstract

Abstract: The microwave interferometer can obtain the Doppler echo signal containing interior ballistic motion information. In order to estimate the instantaneous frequency of echo signal effectively, a mathematical model of motion curve of projectile in bore is established based on polynomial fitting. The methods of short-time Fourier transform, Wigner-Ville distribution, polynomial chirplet transform (PCT) are used to analyze the simulation echo signals of projectiles with different noise and experimental echo signals of projectiles, respectively. The results show that the PCT method which uses transform kernel based on polynomial frequency modulated wavelet has the best time-frequency concentration and accuracy of instantaneous frequency estimation (IFE) and good anti-interference ability compared with the other methods. The research results show that the PCT method is suitable for IFE of projectile's signals. Key

Key words: ordnancescienceandtechnology, instantaneousfrequencyestimation, projectilemotion, microwaveinterferometer, time-frequencydistribution

CLC Number:

TJ012.1⁺6

WANG Jian, HAN Yan, WANG Li-ming, ZHANG Pi-zhuang, CHEN Ping. Estimation Method for Instantaneous Frequency of Echo Signal of Projectile in Bore[J]. Acta Armamentarii, 2017, 38(9): 1806-1814.

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第38卷
第9期2017 年9月兵工学报ACTA
ARMAMENTARIIVol.38No.9Sep.2017

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