Physical modeling of active cancellation of low-frequency sound signals

Belogubtsev, E. S.; Kuznetsov, G. N.; Mikhailov, S. G.; Pudovkin, A. A.; Smagin, D. A.

doi:10.3103/s1541308x11030083

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Active stealth technology has been paid more and more attention in recent years because of some irreversible defects of traditional passive stealth technology, such as weakening the aerodynamic performance and maneuverability of the aircraft, increasing postmaintenance costs and low efficiency for low-frequency radar. At present, a variety of active cancellation algorithms have been proposed (Khan et al, 2012;Xu and Xu, 2013;Zikidis et al, 2014;Belogubtsev et al, 2011;Osman and Alzebaidi, 2013;Yi et al, 2015), in which spectral spreading-compressing (SSC) algorithm is a new and promising active cancellation algorithm. SSC algorithm is a frequency shift interference method based on SSC according to time delay-Doppler coupling characteristics of linear frequency modulation (LFM) signal.…”

Section: Introductionmentioning

confidence: 99%

Simulation of active cancellation system based on N-order SSC algorithm

Huang

et al. 2019

AEAT

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Purpose The purpose of this paper is to introduce the theoretical basis of N-order spectral spreading-compressing (SSC) frequency shift interference algorithm and expand it to active cancellation. An active cancellation simulation and verification system based on N-order SSC algorithm is established and carried out; simultaneously, the absorbing material coating stealth simulation of two kinds of thickness is carried out to compare the stealth effect with active cancellation system. Design/methodology/approach The active cancellation method based on N-order SSC algorithm is proposed based on theoretical formula derivation; the active cancellation simulation and verification system is established in MATLAB/Simulink. The full-size model is built by CATIA and meshed by hypermesh. The omnidirectional radar cross section (RCS) is calculated in cadFEKO, and the results are analyzed in postFEKO. Findings The simulations are implemented on a stealth fighter, and results show that after active cancellation, the peak of spectrum analyzer has reduced in all azimuths, the omnidirectional RCS has also decreased and the detection probability of almost all azimuths has dropped under 50 per cent. The absorbing material coating stealth simulations of two kinds of thickness are carried out, and results show that the stealth effect of active cancellation is much better than absorbing material coating. Practical implications An active cancellation system based on SSC algorithm is proposed in this paper, and the effect of active cancellation is verified and compared with that of absorbing materials. A new method for the current active stealth is provided in this paper. Originality/value Active cancellation simulation and verification system is established. RCS calculation module, signal-to-noise-ratio (SNR) calculation module and detection probability module are built to verify the effect of active cancellation system. Simultaneously, the absorbing material coating stealth simulation is carried out, and the stealth effect of absorbing material coating and active cancellation are compared and analyzed.

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Section: Introductionmentioning

confidence: 99%

Simulation of active cancellation system based on N-order SSC algorithm

Huang

et al. 2019

AEAT

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Diffraction of signals and disturbances inside a ship fairing on the surface of cylindrical antenna and cofferdam

Kornienko

Kuznetsov

2014

Phys. Wave Phen.

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The spatial and temporal structure of signals and disturbances inside a ship fairing (in particular, on the surfaces of vertical cylindrical antenna and cofferdam) has been investigated. It is established that the disturbance from the engine-propeller system forms a complex interference structure in the fairing, with a peak located between the antenna and cofferdam. It is shown that efficient absorption of disturbances by the cofferdam, for example, using active damping tools, eliminates the reverberation field from the fairing and reduces the disturbance on the surface of hydroacoustic antenna.

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Physical modeling of active cancellation of low-frequency sound signals

Cited by 2 publications

References 3 publications

Simulation of active cancellation system based on N-order SSC algorithm

Simulation of active cancellation system based on N-order SSC algorithm

Diffraction of signals and disturbances inside a ship fairing on the surface of cylindrical antenna and cofferdam

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