The Radar Cross Section of small propellers on Unmanned Aerial Vehicles

Pető, Tamás; Bilicz, Sándor; Szucs, Laszlo; Gyimóthy, Szabolcs; Pávó, József

doi:10.1109/eucap.2016.7481645

Cited by 11 publications

(6 citation statements)

References 3 publications

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“…However, the typical propeller size of these vehicles gives rise to a resonant behavior at some commonly used radar frequency bands. This phenomenon, a kind of micro-Doppler-effect, is studied by means of anechoic chamber measurements and numerical simulations [91].…”

Section: Electromagnetic Simulation and Design Laboratorymentioning

confidence: 99%

“…Special attention is paid to the challenges of small-sized Unmanned Aerial Vehicles (UAVs) detection by combining electromagnetic simulations and anechoic chamber measurements. Consequently, a wide range of activities related to passive radars are in progress [91,97,98] where the cooperation of colleagues with different competences and facilities (electromagnetic modelling, signal processing, hardware development and measurement infrastructure) is essential to succeed in this field.…”

Section: Microwave Remote Sensing Laboratorymentioning

confidence: 99%

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BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

Charaf

Harsányi

Poppe

et al. 2017

Period. Polytech. Elec. Eng. Comp. Sci.

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Preface Since being established in 1949, the Faculty of Electrical Engineering and Informatics (VIK) BME has played a flagship role in the development of electronics, IT and computer science in Hungary.We László Jakab (dean, BME VIK) János Levendovszky (vice-dean in charge of scientific affairs, BME VIK) are proud of combining engineering applications with sound scientific results, which is the assurance of high-level industrial collaboration leading to novel results and innovation. The various collaborations with our industrial partners has made it clear that the industry expects methods and results which make their industrial processes more effective and increase productivity and quality. Thus, participation in these collaborations give a competitive edge and ensure the continuous development of VIK. These factors have positioned our Department of Automation and Applied InformaticsDepartment of Automation and Applied Informatics (AUT) is one of the largest and dynamically developing departments at BME with diverse scope competences such as control theory, embedded systems, software modelling, applied software development, Internet of Things, power electronics, mechatronics, and many others. The department's main activities are education, research and development. Training versatile electrical and software engineers with solid practical knowledge is our top priority. Our profile also includes developing high quality software and hardware solutions for industry partners. All of our activities are backed by strong research background.In 2016, the department organized and hosted a number of domestic and international events. In cooperation with the industry, AUT has organized the IoT4U conference. It was dedicated to Internet of Things, cloud and data management as well as the integration of IoT into various formats. RobonAUT, the yearly domestic amateur robotics contest was organized by the department in February 2016. The yearly contest is open to teams of students, organized either in student projects within the department or independent research teams.The next sections summarize the key research results of the department in year 2016. Software Development Methods and Mobile PlatformsThe diversity of mobile platforms necessitates the development of the same mobile application for all major mobile platforms, what requires considerable development effort. Mobile application developers are multiplatform developers, but they still prioritize the platforms, therefore, not all platforms are equally important for them. Appropriate methods, processes and tools are required to support the development in order to achieve better productivity.The research on educational mobile applications that adapt to the mental state of the user required a method for estimating the difficulty of tasks found in the serious games. There are generated or random assignments where the effort required from the user is not known or cannot be estimated in advance.61 (2) IoT and Smart CityThe Internet of Things (IoT) is transforming the surroun...

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Section: Electromagnetic Simulation and Design Laboratorymentioning

confidence: 99%

Section: Microwave Remote Sensing Laboratorymentioning

confidence: 99%

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

Charaf

Harsányi

Poppe

et al. 2017

Period. Polytech. Elec. Eng. Comp. Sci.

View full text Add to dashboard Cite

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“…Besides the micro-Doppler analysis, the investigation of the resonant effects of the propellers also has significance. It has been shown in [3], that the back-scattered field of the propellers has the highest intensity near its resonant frequency. Moreover, the unique properties of the reflected signal from the propeller facilitate the identification of the detected object.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Studies on Scattering from Multiple Propellers of Small UAVs

Pető

Marák

Bilicz

et al. 2018

12th European Conference on Antennas and Propagation (EuCAP 2018)

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Electromagnetic scattering from propellers of smallsized Unmanned Aerial Vehicles (UAVs) is studied in this work. Previous works have shown that rotating propeller blades produce significant fluctuations of the Radar Cross Section (RCS) in the case when the propeller length is about half a wavelength of the illuminating wave. To some extent, this facilitates both the measurement of the RCS in anechoic chamber and the detection of small-sized UAVs. In the present contribution, these studies are extended to the case of multiple propellers, between which an electromagnetic coupling is expected. The scattered field and the RCS is calculated by means of electromagnetic simulation using an integral equation formulation, and the theory is validated against anechoic chamber measurements.

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“…Малоразмерные воздушные объекты обычно характеризуются эффективной площадью рассея-ния порядка 0.001…0.1 2 м [6]- [8], что при относительно низкой средней мощности (0.01…1 Вт) РЛС с непрерывным излучением приводит к необходимости увеличения продолжительности интервала когерентного накопления эхосигналов целей для обеспечения требуемого качества их обнаружения. Однако характерной особенностью эхосигналов таких объектов, как, например, мультикоптеры, служит многомодальность спектра доплеровских частот [6], [7], что существенно затрудняет определение их скорости с использованием традиционных подходов, применяемых в импульсно-доплеровских РЛС.…”

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“…Составляющие его отсчеты дискретных дальностных портретов определяются как [7]. В результате точное определение скорости движения цели становится затруднительным вследствие значительной неоднозначности доплеровского сдвига частоты ее эхосигнала.…”

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Algorithm of Signal Processing in the Radar System With Continuous Frequency Modulated Radiation for Detection of Small-Sized Aerial Objects, Estimation of Their Range and Velocity

Купряшкин

Соколик²

2019

Izv. vysš. učebn. zaved. Ross., Radioèlektron.

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Nowadays the interest in search of ways of improving the efficiency of small radar cross-section aerial objects detection and localization rises against the background of widespread use of light and unmanned aerial vehi-cles. As a result, researchers pay attention to radar systems (RS) with continuous linear frequency modulation (linear FM) signal. The use of such signals gives the measurable opportunity to reduce radar system peak-speech power and to cut the cost and weightsize parameters of the RS. The paper observes low-power ground based radar implementation prospects for purposes of detection and estimation of motion rates of small-sized aerial objects. The proposed algorithm of radar signals processing enables to simplify the detection of such tar-gets. The paper reveals the structure and defines the steps of the algorithm. The fundamental for the algorithm under consideration is the method of the range-Doppler image composition of the scanned area using digital signal processing. The paper presents the results of the algorithm operation in the low-power RS of C-band radar, obtained by processing of quadrotor echo-signals during the real experiment. The results show successful solvation of the applied problem of detection and tracking on the small-sized aerial object with the radar cross-section equal to less than 0.5 m2 and the spectrum of secondary radiation characterized by the expressed multimodality. The results of the experiment validate the application of the algorithm and demonstrate the possibility of the algorithm implementation in design of portable RS and automated target acquisition centers for detecting and tracking of the small-sized aerial targets (both, single as multi agent) with the information display on operator control panel.

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The Radar Cross Section of small propellers on Unmanned Aerial Vehicles

Cited by 11 publications

References 3 publications

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

BME VIK Annual Research Report on Electrical Engineering and Computer Science 2016

Experimental and Numerical Studies on Scattering from Multiple Propellers of Small UAVs

Algorithm of Signal Processing in the Radar System With Continuous Frequency Modulated Radiation for Detection of Small-Sized Aerial Objects, Estimation of Their Range and Velocity

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