Yazar "Eroğlu, Mustafa" seçeneğine göre listele
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Öğe Comparative analysis of full car model with driver using pid and lqr controllers(2022) Eroğlu, Mustafa; Koç, Mehmet Akif; Kozan, Recep; EŞen, İsmail-Öğe Design of the active control algorithm to reduction of the vibrations due to interactionhigh-speed railway vehicle bogie and structure(2021) Koç, Mehmet Akif; Eroğlu, Mustafa; EŞen, İsmailThis study analyzes excessive vibrations that occurred on the railway vehicle bogie with the computer simulation of a 4-DOF half car railway bogie dynamic physical model and Euler-Bernoulli flexible bridge beam with the simply supported boundary conditions has been introduced considering some limitations which affect problem formulation. To reduce these excessive vibrations other than conventional suspension systems such as passive one, an active suspension system has been designed and attached to the primary suspension system of the railway bogie car. Then, to control these active suspension systems, a control algorithm based on PID and SMC is considered. The coupled equation of motion of the railway bogie car and flexible Euler-Bernoulli bridge beam is obtained by Hamilton’s principle in the time domain with the active suspension system. Finally, to demonstrate the effect of the active suspension system with the PID and SMC algorithm upon these excessive vibrations, a computer simulation has been implemented, and the results are presented comparatively. Consequently, the maximum railway vehicle bogie vertical displacement and vertical acceleration have been significantly reduced.Öğe Dynamic analysis of flexible structures under the influence of moving multiple vehicles(2018) Koç, Mehmet Akif; Eroğlu, Mustafa; Çay, Yusuf; Çerlek, Ömer; EŞen, İsmailIn this study, the parameters affecting the dynamic behavior of flexible structures under the influence ofmultiple vehicle passages are examined in detail. The flexible structure considered in the study is considered as abridge girder with simple supported boundary conditions which modelled according to Euler-Bernoulli thin beamtheory. The equations of motion of the bridge beam in contact with the vehicle passing over the bridge wereobtained by using the Lagrange equation after the kinetic and potential energies of the system were obtained. Thesecond-order differential equations representing the motion of the system are transformed from the first-order statespace matrix representation to the first-order state using the state variables specified in the study. The system ofdifferential equations is then solved with high accuracy using a special program prepared in the MATLABcommercial software using the Runge-Kutta algorithm from the fourth degree in the time domain.Öğe On the 3D wave propagation response of sandwich nanoplates with symmetric FGM face layers and GPRL-reinforced foam core layer(Springer Science and Business Media LLC, 2024-12-10) Eroğlu, Mustafa; Esen, İsmail; Koç, Mehmet AkifThis study investigates 3D wave propagation in a sandwich nanosensor plate, emphasizing thermo-mechanical characteristics. The research employs sinusoidal higher-order shear deformation and nonlocal strain gradient elasticity theories on sandwich construction, including functionally graded ceramic (Si3N4) and metal (Ti6Al4V) face layers and a graphene-reinforced metal foam core. The governing equations are formulated using Hamilton's principle and resolved by the Navier method, integrating temperature, Lorentz, and viscoelastic effects. The primary characteristics examined encompass graphene volume fraction, temperature fluctuations, nonlocal effects, foam porosity, and magnetic potential. The results demonstrate a phase velocity of almost 4.2 km/s at wave numbers above 100 1/nm at Delta T = 0, diminishing to approximately 3.0 km/s as Delta T approaches 1200. The findings enhance the optimization of nanosensor design for dependability under elevated temperature conditions.Öğe Self-tuning fuzzy logic control of quarter car and bridge interaction model(2021) Eroğlu, Mustafa; Koç, Mehmet Akif; Kozan, Recep; EŞen, İsmailIn this study, active suspension control of the interaction between the bridge can be modeled according to the Euler-Bernoulli beam theory, and the quarter car model with three degrees of freedom is studied. The active suspension system consists of a spring, damper, and linear actuator. The active suspension control is designed using classical PID and self-tuning fuzzy PID (STFPID) to reduce the vehicle body's disruptive effects. To determine the performance of the designed controllers, two different road profiles with the bridge oscillations caused by the bridge flexibility were considered as the disruptive effect of the vehicle. When the simulation results were examined in terms of passenger seat displacement and acceleration, the proposed STFPID method significantly increased road holding and ride comfort.Öğe Yük trenlerinde dikey yöndeki ray/teker etkileşiminin modellenmesi ve analizi(Karabük Üniversitesi, 2017) Eroğlu, Mustafa; Esen, İsmailGünümüz ulaşım sisteminde raylı sistem taşımacılığı önemli bir yer tutmaktadır. Raylı araçlarda tren hızı ve taşınan yük miktarları sürekli artma eğilimindedir. Bununla birlikte ray ve teker etkileşimi sonucunda oluşacak bazı problemler doğmaktadır. Bunların en önemlilerinden birisi de titreşimdir. Trenin hareketi sırasında gerek raydan gerekse de tekerden kaynaklanan bozucu etki sonucunda titreşimler oluşabilmektedir. Oluşan bu titreşim değerleri gürültüye sebep olarak yolcu konforunu olumsuz etkiler ve raylı araç bileşenlerinin aşınmasına, yorulmasına ve ömürlerinin kısalmasına neden olabilmektedir. Bunlarla birlikte demiryolunda bulunan balast ile raylı araçlarda bulunan süspansiyon sistemleri bu titreşimleri azaltabilmektedir. Bu tez çalışmasında sonlu elemanlar yöntemi kullanılarak ray ve teker etkileşimi üzerine çalışılmıştır. Bilgisayar destekli tasarımı yapılan raylı araç modeli ANSYS paket programı ile analiz edilmiştir. Bu çalışmada birden fazla analiz yapılmıştır. Teker veya ray yüzeyindeki kusurların ve demiryolu alt yapısındaki balastın ray/teker etkileşimini nasıl etkiledikleri incelenmiştir.
