Browsing by Subject "Military applications"

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    Design and analysis of slotted sectoral waveguide array antennas embedded in cylindrically stratified media
    (IEEE, 2014-07) Kalfa, Mert; Ertürk Vakur B.
    Slotted waveguide antennas are being widely used in military and commercial applications for many decades. Low cross-polarization, high power capacity, ease of fabrication in microwave bands, and the ability to form arrays make them excellent candidates for phased array antennas in radar applications. However, due to slots being highly resonant (narrow-band, high Q) radiators, their design parameters are very sensitive; hence, accurate design and analysis methods are required for a successful antenna design. Moreover, slotted waveguide array antennas are low-profile structures, which makes them suitable candidates for conformal and structure-integrated applications. Conformal and structure-integrated system solutions are especially required for air platforms, where aerodynamics, radar cross-section (RCS) and efficient use of real estate are of utmost importance. Although the accurate and efficient design and analysis of low-profile conformal slotted waveguide arrays are of great interest, available solution methods in the literature usually suffer in terms of efficiency and memory requirements. Among the available solution methods, one of the widely used solvers are integral equation (IE) based ones that utilize the method of moments (MoM). However, IE solvers suffer from long matrix fill times, especially for matrix entries related to the cylindrically stratified media. © 2014 IEEE.
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    İnsansız hava araçları için eşanlı konumlandırma ve haritalama
    (IEEE, 2008-04) Kök, Mehmet; Barshan, Billur
    Sabit yükseklikte uçtuğu varsayılan insansız Hava Araçları ( İHA) için görü-tabanlı bir Eşanlı Konumlandırma ve Haritalama (EKVH) algoritması sunulmaktadır. Araç üzerindeki kameradan elde edilen görüntülerin öznitelikleri kullanılarak farklı yer işaretleri saptanmaktadır. Yer işaretlerine Genişletilmiş¸ Kalman Süzgeci (GKS) uygulanmış ve EKVH probleminin çözümü için bazı benzetim sonuçları sunulmuştur.
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    A simulation model for military deployment
    (IEEE, 2007) Yıldırım, Uğur Z.; Sabuncuoğlu, İhsan; Tansel, Barbaros
    The Deployment Planning Problem (DPP) for military units may in general be defined as the problem of planning the movement of geographically dispersed military units from their home bases to their final destinations using different transportation assets and a multimodal transportation network while obeying the constraints of a time-phased force deployment data describing the movement requirements for troops and equipment. Our main contribution is to develop a GISbased, object-oriented, loosely-coupled, modular, platformindependent, multi-modal and medium-resolution discrete event simulation model to test the feasibility of deployment scenarios. While our simulation model is not a panacea for all, it allows creation and testing the feasibility of a given scenario under stochastic conditions and can provide insights into potential outcomes in a matter of a few hours.