Radar cross section calculation of a wind turbine modeled by PEC canonical structures

Yucedag, Okan Mert; Yucedag, Senem Makal; Serim, Huseyin Avni

doi:10.1109/eleco.2013.6713909

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…Kullanılan analitik yöntem, kanatların dönüş hareketinin elektromanyetik saçıcılık açısından analiz edilebilmesini saglamaktadır [10]. Türbinin yüksek saçıcılıga sahip kısımları gövde ve kanatlar oldugundan, nasel gibi sadece belirli açılarda saçıcılıga sahip olabilecek diger α $ β $ Sekil 2.…”

Section: B Sar Sinyal Modeli: Zamana Baglı Genlik Degişimiunclassified

“…Kanonik yapılarla modellenen rüzgâr türbini kısımlar ele alınmamaktadır [11].Şekil 2'de, kanatların xydüzlemindeki dönüş açısı α, yz-düzlemindeki dönüş açısı ise β ile gösterilmektedir. Rüzgâr türbinlerini oluşturan PEC dikdörtgen plaka ve silindir biçimindeki kanonik yapıların RKA degerleri, SAR sensörünün gözlem süresi boyunca anlık olarak hesaplanır ve bu hesaplanan RKA degerleri SAR sinyal modelinin genlik ifadesinde kullanılır [10], [12], [13]. Rüzgâr türbininin RKA degeri σ T ise, her bir kanonik yapıdan saçılan elektrik alanın toplanmasıyla elde edilebilir [14]:…”

Section: B Sar Sinyal Modeli: Zamana Baglı Genlik Degişimiunclassified

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Investigation of deteriorating effects of wind farms on SAR imaging

Karabayir

Yucedag

et al. 2014

2014 22nd Signal Processing and Communications Applications Conference (SIU)

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Özetçe-Bu çalışmada, rüzgâr türbinlerinin hareket ve saçıcılık özelliklerini dikkate alan bir Sentetik Açıklık Radarı (SAR) sinyal modeli önerilmektedir. Kanonik yapılar ile modellenen türbinlerin Radar Kesit Alanı (RKA) degerleri sinyal modelinde kullanılmakta ve rüzgâr çiftliklerinin SAR görüntülerinde meydana getirmesi muhtemel bozucu etkiler araştırılmaktadır. Buşekilde elde edilen SAR görüntüleri, türbinlerin RKA degerinin kullanılmadıgı sinyal modeliyle elde edilen görüntüler ile karşılaştırılmakta ve türbinlerin anlık saçıcılık bilgisinin SAR görüntülemedeki önemi ortaya konulmaktadır. Anahtar Kelimeler-Rüzgâr Çiftlikleri, SAR Görüntüleme, RKAAbstract-In this work, a Synthetic Aperture Radar (SAR) signal model that considers the rotational movement and scattering of wind turbines is proposed. The Radar Cross Sections (RCS) of the wind turbines that are modelled via the assembly of canonical structures are included in the signal model and the deteriorating effects of wind farms on SAR images are investigated. These SAR images are compared to the SAR images that are obtained without using RCS values and the significance of considering the time-varying scattering characteristics of wind turbines on SAR imaging is put forth.

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Section: B Sar Sinyal Modeli: Zamana Baglı Genlik Degişimiunclassified

Investigation of deteriorating effects of wind farms on SAR imaging

Karabayir

Yucedag

et al. 2014

2014 22nd Signal Processing and Communications Applications Conference (SIU)

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“…To obtain realistic far field conditions for microwave frequency bands, the tower and blades are divided into small enough PEC canonical parts such as cylinders and plates, respectively [7,8]. Interactions between the canonical parts are neglected.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, an analytical method is proposed to calculate the monostatic RCS of an electrically large, PEC turbine located over a dielectric half space using four‐path model. To obtain realistic far field conditions for microwave frequency bands, the tower and blades are divided into small enough PEC canonical parts such as cylinders and plates, respectively [7, 8]. Interactions between the canonical parts are neglected.…”

Section: Introductionmentioning

confidence: 99%

Analytical method for monostatic radar cross section calculation of a perfectly conducting wind turbine model located over dielectric lossy half space

Yucedag

Serim

2014

IET Radar, Sonar & Navigation

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Radar cross section (RCS) of a wind turbine has a key role for determining possible effects of wind farms on radar and navigation systems. Closed form expressions of the physical optics technique are applied to calculate monostatic radar cross section of an electrically large wind turbine model over a dielectric, lossy half space. The model is constructed with perfectly conducting canonical structures. First-order effects of the half space to the electromagnetic scattering mechanism are approximated with four-path model. Doppler spectrogram of the turbine model over lossy ground is obtained using short-time Fourier transform. The closed form expressions provide very-fast RCS calculations for different broadside directions and blade rotation speeds. Performance of this proposed method shows that it is suitable for real-time simulations that analyse the effects of the wind farms to the radar and navigation systems performance.

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“…Since simulating this structure requires huge memory resources, it has to be simplified. A common approximation is to consider blades as metallic [4].…”

Section: Introductionmentioning

confidence: 99%