RCS Estimation of Drone Motion Using Mesh-Element Rotation in MoM and Micro-Doppler Signatures

Lee, Dong-Yeob; Lee, Jae-In; Seo, Dong-Wook

doi:10.1109/tap.2022.3146444

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…The figure highlights that the RCS calculation method proposed in this paper matches FEKO's results, indicating that this method can accurately calculate the RCS of target scatterers. The error is further quantified by Equation (10), where R represents the RCS value, subscripts A and B represent FEKO and the proposed method, respectively, and the L2-norm error resulting from the two methods of calculation is 3.7%. The error is slightly larger compared to the first two cases, which may be due to the fact that the FEKO calculation method in this model is based on the integral equation method.…”

Section: Validation Of Rcs Calculation In Free Spacementioning

confidence: 99%

“…Lucente et al (2008) utilized an iteration-free MOM approach to solve large multiscale electromagnetic scattering problems [9]. Lee et al (2022) used MOM to quickly estimate the dynamic RCS of a drone in various motions [10]. Differential methods generally require boundary conditions to truncate open spaces and can theoretically handle various shapes and parameterized media situations.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

Zhao,

Chen,

Zhuang

et al. 2024

Symmetry

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This article proposes a novel method for calculating radar cross-sections (RCSs) that combines the spectral element method and the integral method, allowing for RCS calculations at any position in a free space or a half-space. This approach replaces the field source with an incident field using the scattered field equation of the spectral element method, enabling the arbitrary placement of the field source without being limited by the computational domain. By applying the superposition theorem and the volume equivalence principle, the scattered field of the objects at any position is obtained through integral equations, eliminating limitations on the computation points imposed by the computational domain. Based on Green’s function’s important role throughout the calculation process and its symmetry properties, the RCS calculation of symmetric models will be more advantageous. Finally, several examples, including symmetry models, are provided to validate both the feasibility and accuracy of this proposed method.

show abstract

Section: Validation Of Rcs Calculation In Free Spacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

Zhao,

Chen,

Zhuang

et al. 2024

Symmetry

View full text Add to dashboard Cite

show abstract

“…Among them, time-domain methods mainly include clutter simulation methods based on statistical models [8], backscatter simulation methods based on measured SAR images, and SAR image simulation methods based on digital elevation models (DEMs) [9,10], which are mainly aimed at simulating large-scene SAR images and have the advantage of low algorithm complexity. Frequency-domain methods mainly include finite-difference time-domain (FDTD) [11][12][13], method of moments (MOM) [14][15][16], physical optics (PO), geometric optics (GO), and SBR methods [17][18][19]. These methods calculate the frequency-domain response of the target to obtain the SAR image and have the characteristics of high algorithm complexity and high calculation accuracy [20].…”

Section: Introductionmentioning

confidence: 99%

High-Precision GPU-Accelerated Simulation Algorithm for Targets under Non-Uniform Cluttered Backgrounds

Zhang,

Zhou,

Song

et al. 2023

Remote Sensing

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This article presents a high-precision airborne video synthetic aperture radar (SAR) raw echo simulation method aimed at addressing the issue of simulation accuracy in video SAR image generation. The proposed method employs separate techniques for simulating targets and ground clutter, utilizing pre-existing SAR images for clutter simulation and employing the shooting and bouncing rays (SBR) approach to generate target echoes. Additionally, the method accounts for target-generated shadows to enhance the realism of the simulation results. The fast simulation algorithm is implemented using the C++ programming language and the Accelerated Massive Parallelism (AMP) framework, providing a fusion technique for integrating clutter and target simulations. By combining the two types of simulated data to form the final SAR image, the method achieves efficient and accurate simulation technology. Experimental results demonstrate that this method not only improves computational speed but also ensures the accuracy and stability of the simulation outcomes. This research holds significant implications for the development of algorithms pertaining to video SAR target detection and tracking, providing robust support for practical applications.

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“…However, it is difficult to analyze the dynamic electromagnetic scattering characteristics of the tilt-rotor aircraft in multiple modes by only relying on the basic QSP because the aircraft can simultaneously tilt the nacelles at low speed and rotate the two rotors at high speed with opposite rotation directions [10]. Therefore, it is necessary to establish a method of dynamic time-varying mesh that can accurately characterize the shape of the tilt-rotor aircraft at any moment, so as to clearly simulate the dynamic process [11,12].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Electromagnetic Scattering Simulation of Tilt-Rotor Aircraft in Multiple Modes

Fei,

Yang,

Jiang

et al. 2023

Sensors

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To study the electromagnetic scattering of tilt-rotor aircraft during multi-mode continuous flight, a dynamic simulation approach is presented. A time-varying mesh method is established to characterize the dynamic rotation and tilting of tilt-rotor aircraft. Shooting and bouncing rays and the uniform theory of diffraction are used to calculate the multi-mode radar cross-section (RCS). And the scattering mechanisms of tilt-rotor aircraft are investigated by extracting the micro-Doppler and inverse synthetic aperture radar images. The results show that the dynamic RCS of tilt-rotor aircraft in helicopter and airplane mode exhibits obvious periodicity, and the transition mode leads to a strong specular reflection on the rotor’s upper surface, which increases the RCS with a maximum increase of about 36 dB. The maximum micro-Doppler shift has functional relationships with flight time, tilt speed, and wave incident direction. By analyzing the change patterns of maximum shift, the real-time flight state and mode can be identified. There are some significant scattering sources on the body of tilt-rotor aircraft that are distributed in a planar or point-like manner, and the importance of different scattering sources varies in different flight modes. The pre-studies on the key scattering areas can provide effective help for the stealth design of the target.

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RCS Estimation of Drone Motion Using Mesh-Element Rotation in MoM and Micro-Doppler Signatures

Cited by 7 publications

References 22 publications

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

A Novel Radar Cross-Section Calculation Method Based on the Combination of the Spectral Element Method and the Integral Method

High-Precision GPU-Accelerated Simulation Algorithm for Targets under Non-Uniform Cluttered Backgrounds

Dynamic Electromagnetic Scattering Simulation of Tilt-Rotor Aircraft in Multiple Modes

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