TY - JOUR
T1 - Modeling and characteristic analysis of underwater acoustic signal of the accelerating propeller
AU - Feng, Yuan
AU - Tao, Ran
AU - Wang, Yue
PY - 2012/2
Y1 - 2012/2
N2 - The signal feature of propeller cavitation noise during acceleration or deceleration procedure can be used to passively detect and classify moving vessels and underwater vehicles in the port regions. By analyzing the chirp periodicity of the variation of propeller wake velocity under acceleration situation, this paper presents a time domain expression of the modulation envelope signal of the accelerating propeller noise, treating the signal as a Gaussian-shaped chirp periodic pulse train with increasing trend and fluctuating pulse amplitude. The paper investigates the characteristics of simplified fractional Fourier transform (SFRFT) spectrum of the chirp periodic signal, and thus obtains the relation between the chirp periodic signal and its chirp harmonics under the conditions of underwater passive detection. Furthermore, the experimental data of the cavitation tunnel satisfy the results obtained by simulation, which verifies the correctness of the proposed signal model.
AB - The signal feature of propeller cavitation noise during acceleration or deceleration procedure can be used to passively detect and classify moving vessels and underwater vehicles in the port regions. By analyzing the chirp periodicity of the variation of propeller wake velocity under acceleration situation, this paper presents a time domain expression of the modulation envelope signal of the accelerating propeller noise, treating the signal as a Gaussian-shaped chirp periodic pulse train with increasing trend and fluctuating pulse amplitude. The paper investigates the characteristics of simplified fractional Fourier transform (SFRFT) spectrum of the chirp periodic signal, and thus obtains the relation between the chirp periodic signal and its chirp harmonics under the conditions of underwater passive detection. Furthermore, the experimental data of the cavitation tunnel satisfy the results obtained by simulation, which verifies the correctness of the proposed signal model.
KW - accelerating propeller
KW - chirp periodic signal
KW - modeling of underwater acoustic signal
KW - simplified fractional Fourier transform
UR - https://www.scopus.com/pages/publications/84856229801
U2 - 10.1007/s11432-011-4285-9
DO - 10.1007/s11432-011-4285-9
M3 - Article
AN - SCOPUS:84856229801
SN - 1674-733X
VL - 55
SP - 270
EP - 280
JO - Science China Information Sciences
JF - Science China Information Sciences
IS - 2
ER -