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

Yacong Wu (School of Aeronautic Science and Technology, Beihang University, Beijing, China)
Jun Huang (School of Aeronautic Science and Technology, Beihang University, Beijing, China)
Mingxu Yi (School of Aeronautic Science and Technology, Beihang University, Beijing, China)
Chaopu Zhang (Shanghai Electro-Mechanical Engineering Institute, Shanghai Academy of Spaceflight Technology, Shanghai, China)

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Publication date: 8 July 2019

Abstract

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.

Keywords

Acknowledgements

The authors are highly grateful to the reviewers and the editor for their constructive comments and valuable suggestions to improve the presentation of the paper.

Citation

Wu, Y., Huang, J., Yi, M. and Zhang, C. (2019), "Simulation of active cancellation system based on N-order SSC algorithm", Aircraft Engineering and Aerospace Technology, Vol. 91 No. 7, pp. 949-960. https://doi.org/10.1108/AEAT-08-2017-0190

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited