Yazar "Sağbaş, Mehmet" seçeneğine göre listele
Listeleniyor 1 - 6 / 6
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe CC-CBTA-Based floating inductance simulator with CM/VM PID controllers∗(World Scientific, 2024) Sağbaş, Mehmet; Cam Taskiran, Z.G.; Ayten, U.E.This work describes voltage-mode (VM), current-mode (CM) PID controllers and an electrically controllable floating inductance (FI) simulator circuit. Only a single current-controlled current backward transconductance amplifier (CC-CBTA) and a grounded capacitor are used in the proposed FI simulator circuit. One CBTA, one CC-CBTA, two capacitors and one resistor are used in the proposed PID controllers. All of the proposed circuits have appropriate input and output impedance values, allowing them to be utilized in cascade connections without requiring a buffer circuit. There is also no matching constraint between the active and passive values of the proposed circuit. The SPICE software environment and experimental results were used to validate theoretical derivations and associated outcomes. The layout of the CC-CBTA has been built, and the post-layout simulations are carried out using the netlist extracted from the layout. Comparisons were made with similar circuits found in the professional literature. © World Scientific Publishing Company.Öğe Current-mode PID controllers employing commercially available active components(Elsevier GmbH, 2024) Yürdem, Betül; Sağbaş, Mehmet; Ayten U.E.This work describes two current-mode (CM) PID controllers using only two commercially active components, namely, current feedback operational amplifier (CFOA), and four passive components, i.e. two capacitors and two resistors. They have appropriate output and input impedance values, allowing them to be utilized in cascade connections without requiring a buffer circuit. Since all capacitors are grounded, it is suitable for integrated circuit (IC) technology. Moreover, the controllers can be easily modified to operate in voltage-mode (VM), transimpedance-mode (TIM), and transadmittance-mode (TAM) PID controllers. Using 0.18 µm CMOS parameters and the PSPICE program, the proposed circuits are simulated to verify the theoretical behavior. To demonstrate the viability of the circuits, experimental tests using commercially available AD844 integrated circuits are performed. The suggested PID circuits are also experimental tested in a closed-loop system as an example. © 2023 Elsevier GmbHÖğe Design of fractional/integer order PID controller using single DVCC and Its cardiac pacemaker application(Springer Birkhauser, 2024) Yürdem, Betül; Aksu, Mustafa Furkan; Sağbaş, MehmetCardiac failures and other cardiovascular diseases are a primary cause of death worldwide. Cardiovascular disorders, including heart failure, are the primary cause of death globally. Controller design for pacemakers is a crucial area of research. In this study, a novel proportional-integral-derivative (PID) controller design that can be used to efficiently regulate the heart rate of the cardiac pacemaker is presented. The proposed PID controller employs only one Differential Voltage Current Conveyor (DVCC) active element, two resistors, and two capacitors. The proposed PID controller circuit has voltage differential inputs, thus eliminating the need for the extra differential amplifier (DA) circuit required for closed-loop systems such as the cardiac pacemaker heart rate control system. A fractional-order (FO) PID controller (PI lambda D mu) circuit is created from the proposed integer order (IO) PID controller circuit. A cardiac pacemaker application example is given to demonstrate the workability of the proposed FO and IO PID controller circuits. Using 0.18 mu m CMOS parameters and the PSPICE simulation program, both the proposed FO and IO PID controller circuits in a closed-loop system are performed to verify the theoretical behavior.Öğe Estimation of weibull probability distribution parameters with optimization algorithms and Foca wind data application(Gazi Univ, 2024) Köse, Bayram; Işıklı, İbrahim; Sağbaş, MehmetIn this study, the scale and shape parameters of the Weibull probability distribution function (W.pdf) used in determining the profitability of wind energy projects are estimated using optimization algorithms and the moment method. These parameters are then used to estimate the wind energy potential (WEP) in Foca region of Izmir in Turkey. The values of Weibull parameters obtained using Particle Swarm Optimization (PSO), Sine Cosine Algorithm (SCA), Social Group Optimization (SGO), and Bat Algorithm (BA) were compared with the estimation results of the Moment Method (MM) as reference. Root mean square error (RMSE) and chi-square (chi<^>2) tests were used to compare the parameter estimation methods. The wind speed measurement values of the observation station in Foca were used. As a result of Foca speed data analysis, the annual average wind speed was determined as 6.15 m/s, and the dominant wind direction was found as northeast. Wind speed frequency distributions were compared with the measurement results and calculated with the estimated parameters. When RMSE and chi<^>2 criteria are evaluated together; it can be concluded that each used method behaves similarly for the given parameter estimation problem, with minor variations. As a result, it has been found that the optimization parameters produce very good results in wind speed distribution and potential calculations.Öğe Estimation of weibull probability distribution parameters with optimization algorithms and Foça Wind Data application(Gazi Univ, 2024) Köse, Bayram; Işıklı, İbrahim; Sağbaş, MehmetIn this study, the scale and shape parameters of the Weibull probability distribution function (W.pdf) used in determining the profitability of wind energy projects are estimated using optimization algorithms and the moment method. These parameters are then used to estimate the wind energy potential (WEP) in Fo & ccedil;a region of & Idot;zmir in Turkey. The values of Weibull parameters obtained using Particle Swarm Optimization (PSO), Sine Cosine Algorithm (SCA), Social Group Optimization (SGO), and Bat Algorithm (BA) were compared with the estimation results of the Moment Method (MM) as reference. Root mean square error (RMSE) and chi- square (chi<^>2) tests were used to compare the parameter estimation methods. The wind speed measurement values of the observation station in Fo & ccedil;a were used. As a result of Fo & ccedil;a speed data ana lysis, the annual average wind speed was determined as 6.15 m/s, and the dominant wind direction was found as northeast. Wind speed frequency distributions were compared with the measurement results and calculated with the estimated parameters. When RMSE a nd chi<^>2 criteria are evaluated together; it can be concluded that each used method behaves similarly for the given parameter estimation problem, with minor variations. As a result, it has been found that the optimization parameters produce very good results in wind speed distribution and potential calculations.Öğe Single VDCC based memcapacitor emulator circuit without using passive elements and analog multiplier(Natl Inst Science Communication-Niscair, 2024) Korkmaz, Muhammet Oguz; Sağbaş, Mehmet; Babacan, Yunus; Yesil, AbdullahIn this work, a grounded charge-controlled memcapacitor emulator circuit based on a Voltage Difference Current Conveyor (VDCC) is presented. The proposed circuit is constructed with only one VDCC element and four MOSFETs. It has a transistor-based structure without the use of any passive components. The absence of any passive components makes the circuit eliminating the need for complicated analog components. The suggested circuit does away with the necessity for a mutator, which eliminates the need for an additional separate memristor emulator. The analog multiplier circuit is also not used. Additionally, the designed memcapacitor circuit allows for independent electronic control of both the fixed and variable components, adding to its flexibility and adaptability. To demonstrate the accuracy of the suggested circuit, a SPICE simulation was run using a VDCC constructed with 0.18 mu m TSMC CMOS transistors.
