Ablay, Günyaz

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https://hdl.handle.net/20.500.12573/5640
Name Variants
Ablay, Günyaz
Ablay, Gunyaz
Ablay, G.
Ablay, Guenyaz
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01. Abdullah Gül University
Mühendislik Fakültesi
Elektrik-Elektronik Mühendisliği
Status
Former Staff
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Sustainable Development Goals

5

GENDER EQUALITY
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11

SUSTAINABLE CITIES AND COMMUNITIES
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1

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3

GOOD HEALTH AND WELL-BEING
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4

QUALITY EDUCATION
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17

PARTNERSHIPS FOR THE GOALS
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9

INDUSTRY, INNOVATION AND INFRASTRUCTURE
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1

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6

CLEAN WATER AND SANITATION
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13

CLIMATE ACTION
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10

REDUCED INEQUALITIES
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16

PEACE, JUSTICE AND STRONG INSTITUTIONS
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12

RESPONSIBLE CONSUMPTION AND PRODUCTION
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14

LIFE BELOW WATER
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1

NO POVERTY
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15

LIFE ON LAND
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2

ZERO HUNGER
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8

DECENT WORK AND ECONOMIC GROWTH
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7

AFFORDABLE AND CLEAN ENERGY
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Scholarly Output

38

Articles

23

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Supervised MSc Theses

2

Supervised PhD Theses

0

WoS Citation Count

234

Scopus Citation Count

308

WoS h-index

9

Scopus h-index

11

Patents

0

Projects

0

WoS Citations per Publication

6.16

Scopus Citations per Publication

8.11

Open Access Source

13

Supervised Theses

2

JournalCount
Proceedings of the Institution of Mechanical Engineers Part I-Journal of Systems and Control Engineering2
-- 8th International Conference on Electrical and Electronics Engineering, ELECO 2013 -- Bursa -- 1026442
Transactions of the Institute of Measurement and Control2
Journal of Electrical Engineering & Technology2
3rd International Conference on Smart Energy Systems and Technologies (SEST) -- SEP 07-09, 2020 -- Istanbul, TURKEY1
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Now showing 1 - 10 of 38
  • Thumbnail Image
    Article
    Citation - WoS: 5
    Citation - Scopus: 6
    Design, Modeling, and Control of a Horizontal Magnetic Micromanipulator
    (Sage Publications Ltd, 2019) Ablay, Gunyaz; Boyuk, Mustafa; Icoz, Kutay
    Magnetic micromanipulators with a wide range of force generating capabilities are able to manipulate micron size particles for various applications and measurements. These magnetic particles can be coated with receptors to specifically bind to target biomolecules. In this work, a horizontal magnetic micromanipulator is designed, modeled and controlled for single micron size magnetic particle manipulations. A method is presented for dynamic modeling of magnetic micromanipulators. A feedback control method is designed that allows direct linearization of the system. It is shown that the proposed controller guarantees the stability of the closed-loop system, and yields zero steady-state error in a wide range of operation conditions. We show that the micromanipulator is able to generate a wide range of piconewton (pN) scale forces on a superparamagnetic particle for single molecule separation, and biosensor developments.
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    Article
    Design and Real-Time Implementation of a Sliding Mode Observer Utilizing Voltage Signal Injection and PLL for Sensorless Control of IPMSMs
    (Elsevier - Division Reed Elsevier India Pvt Ltd, 2024) Ates, Ertugrul; Tekgun, Burak; Ablay, Gunyaz; Barut, Murat
    In this study, a sliding mode observer (SMO) based on high-frequency (HF) voltage signal injection and a phase-locked loop (PLL) is proposed for estimating the extended electromotive force (EEMF), rotor position, and rotor velocity of an interior permanent magnet synchronous machine (IPMSM). This approach addresses real-time estimation challenges associated with standard SMO and PLL at very low speeds and standstill. A reliable and accurate sensorless speed control system for IPMSM is then developed and implemented in real time using the proposed SMO and PLL, covering a wide range of speeds, including low-speed and standstill conditions. The SMO effectively estimates the EEMF, while the PLL extracts the rotor velocity and position based on these estimates. Compared to conventional SMO and PLL methods, real-time results from an 8-pole, 0.4 kW IPMSM demonstrate the superior efficiency of the proposed system.
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    Conference Object
    Citation - WoS: 1
    Citation - Scopus: 2
    Steam Generator Level Control With an Observer-Based Algebraic Approach
    (IEEE Computer Society help@computer.org, 2013) Ablay, Günyaz
    Level control systems are used to maintain the steam generator water level within the prescribed narrow limits and to provide constant supply of steam during power demand variations. The current level control systems are often found to be unsatisfactory during startup and low power operations. A robust nonlinear estimator-based optimal algebraic control is developed for level control systems to solve the water level tracking problem during power demand variations. It is shown that the proposed control provides an optimal and robust water level tracking with a single automatic controller over the complete range of power operation in the presence of plant uncertainties and noisy measurements. © 2013 The Chamber of Turkish Electrical Engineers-Bursa. © 2020 Elsevier B.V., All rights reserved.
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    Article
    Citation - WoS: 22
    Citation - Scopus: 24
    Online Condition Monitoring of Battery Systems With a Nonlinear Estimator
    (IEEE-Inst Electrical Electronics Engineers Inc, 2014) Ablay, Gunyaz
    The performance of batteries as uninterruptable power sources in any industry cannot be taken for granted. The failures in battery systems of safety-related electric systems can lead to performance deterioration, costly replacement, and, more importantly, serious hazards. The possible failures in battery systems are currently determined through periodic maintenance activities. However, it is desirable to be able to detect the underlying degradation and to predict the level of unsatisfactory performance by an online real-time monitoring system to prevent unexpected failures through early fault diagnosis. Such an online fault diagnosis method can also contribute to better maintenance and optimal battery replacement programs. A robust nonlinear estimator-based online condition monitoring method is proposed to determine the state of health of the battery systems online in industry. Real-world experimental data of a modern battery system are used to assess the efficiency of the proposed approach in the existence of parameter uncertainties.
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    Article
    Citation - WoS: 2
    Citation - Scopus: 2
    Key Role of High-Tc Twinned Martensitic Materials to Gain a Magnetic Actuation Higher Than 15%
    (Elsevier Science SA, 2021) Sarli, Numan; Paran, Nejdet; Ablay, Gunyaz; Ocak, Hamza Y.; Yildiz, Yasin G.; Yildiz, Gokcen D.; Yagci, Nermin K.
    Twinning angle outcomes of the twinned martensitic (TM) and detwinned martensitic (DTM) structural transformations on the magnetic features of the austenite (A) parent phase are researched by using the effective field theory established by Kaneyoshi. The implementation of the effective field theory verifies that the shape memory mechanism occurs with phase transformations, A -> TM -> DTM -> A. It also shows that the austenite parent phase has two types of actuations: one-dimensional actuation (in only y-axis) for TM, and two-dimensional actuation (in x and y-axes) for DTM. Magnetic field-induced actuation (strain) in the range of 5-15% at twinning angle theta >= 120.816 degrees of TM and DTM is reported for some materials in the literature. On the other hand, in this work, it is estimated that a twinning angle lower than this twinning angle (i.e., theta < 120.816 degrees) must be achieved to have a strain higher than 15%. We also suggest that materials with higher magnetization, Curie temperature, coercive field and remanence magnetization should be taken into account to get a strain higher than 15%, since all these features are directly affected by the twinning angle (theta). Our results on Curie temperature (T-c) match with the experimental results of Ni49.8Mn28.5Ga21.7 (achieved 6% strain) with T-c = 95 degrees C (368 K) by Murray et al., and Ni46Mn24Ga22Co4Cu4 with T-c = 393 K (achieved 12% strain) by Sozinov et al. (C) 2021 Elsevier B.V. All rights reserved.
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    Article
    Citation - WoS: 3
    Citation - Scopus: 3
    Robust Reactivity, Neutron Source, and Precursor Estimators for Nuclear Reactors
    (Elsevier Science SA, 2013) Ablay, Gunyaz
    Reactivity, precursor concentration, and external neutron source strength determine control, operation and performance of nuclear reactors. These main reactor quantities are not directly measurable and must be calculated or estimated using reactor kinetics. This study presents efficient and robust nonlinear estimation algorithms for predicting these fundamental reactor quantities. The effectiveness of the proposed estimators is assessed through chirp and step test signals in the presence of parameter uncertainties and measurement noise. (C) 2013 Elsevier B.V. All rights reserved.
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    Conference Object
    Citation - Scopus: 2
    PI-V plus Sliding Mode Based Cascade Control of Magnetic Levitation
    (Institute of Electrical and Electronics Engineers Inc., 2016) Eroǧlu, Yakup; Ablay, Günyaz
    Magnetic levitation systems are able to provide frictionless, reliable, fast and economical operations in wide-range applications. The effectiveness and applicability of these systems require precise feedback control design. The position control problem of the magnetic levitation can be solved with robust current control approaches. A cascade control approach consisting of PI-velocity plus sliding mode control (PI-V plus SMC) is designed to render high control performance and robustness to the magnetic levitation. It will be shown that the SMC designed for electrical part of the plant (current controller) is able to eliminate the effects of the inductance related uncertainties of the electromagnetic coil of the plant. Experimental results are provided to validate the efficacy of the approach. © 2016 Elsevier B.V., All rights reserved.
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    Conference Object
    A Horizontal Magnetic Tweezer for Single Molecule Micromanipulations
    (Institute of Electrical and Electronics Engineers Inc., 2018) Ablay, Günyaz; Böyük, Mustafa; Eroǧlu, Yakup; İçöz, Kutay
    Magnetic tweezers are able to manipulate cells or biomolecules for various applications and measurements. In this work, a horizontal magnetic tweezer is designed, modeled and controlled for single molecule manipulations. A method is presented for dynamic modeling of horizontal magnetic tweezers. A linear control method is designed to ensure a wide range of operation conditions with zero steady-state error. The horizontal magnetic tweezer is able to generate a wide range of piconewton scale forces on a superparamagnetic microparticle for single molecule separation, and biosensor developments. © 2019 Elsevier B.V., All rights reserved.
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    Master Thesis
    Micro Manyetik ve Parçacıklarının Manipülasyonuna Yönelik Sistem Tasarımı
    (Abdullah Gül Üniversitesi, 2018) BÖYÜK, MUSTAFA; Böyük, Mustafa; İçöz, Kutay; Ablay, Günyaz
    Manyetik cımbızlar çeşitli uygulamalar ve ölçümler için hücreleri veya biyomolekülleri manipüle edebilir. Tek moleküllü manipülasyonlar için bir elektromanyetik mikro manipülatör tasarlandı, modellendi ve kontrol edildi. Elektromanyetik cımbız mikron boyutlu süperparamanyetik parçacıkları uygun kontrol mekanizması yardımıyla kontrol edebilir. Bu parçacıklar, hedef biyomoleküllerin yakalanması için reseptörler ile fonksiyonel hale getirilebildiğinden dolayı yüklü partiküller harici bir manyetik alan kullanılarak belirli bir yere taşınabilirler. Manyetik tek kutup ve manyetik devre yaklaşımları, manyetik sistemin dinamik denklemini modellemek için bu çalışmada kullanıldı. Ofset akım tabanlı geri besleme ile doğrusallaştırma yaklaşımı bir kontrolör tasarlanarak, sıfır kararlı-durum hatasıyla geniş çalışma koşulları sağlandı. Tek parçacığın konumunu bulmak için görüntü tabanlı algoritma geliştirilmiştir. Türetilmiş model ve kontrol sistemini doğrulamak için sayısal simülasyonlar yapılır. Tasarlanan manyetik sistem, 1 ila 10 mikrometre çapındaki manyetik bir parçacığı 1 amperden az bir akımla kontrol etmek için 1-100 pN arasında kuvvet uygulayabilmektedir. Manyetik yönlendirici sistemi, tek hücre ayrımı, ve biyosensör gelişmeleri için kullanılabilir.
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    Article
    Citation - WoS: 27
    Citation - Scopus: 32
    Cascade Sliding Mode-Based Robust Tracking Control of a Magnetic Levitation System
    (Sage Publications Ltd, 2016) Eroglu, Yakup; Ablay, Gunyaz
    Magnetic levitation systems are able to provide frictionless, reliable, fast and economical operations in wide-range applications. The effectiveness and applicability of these systems require precise feedback control designs because the magnetic levitation is an unstable process and have highly nonlinear dynamics. In this article, a robust sliding mode-based cascade control approach is proposed for effectively tracking the reference position of a magnetic levitation system. The magnetic levitation plant is described with electrical and mechanical models, and the control problems of these parts are treated with cascade controllers. An integral sliding mode and an output feedback sliding mode controllers are designed for use in the cascade loops. The performance of the sliding mode controllers is compared with a proportional-integral-velocity plus proportional-integral control structure. It is shown that the proposed control structure is able to provide a highly satisfactory tracking performance and can eliminate the effects of the inductance-related uncertainties and operating point originated disturbances. The experimental results are provided to validate the efficacy and feasibility of the approach.