Özdemirel, Barbaros

Profile URL
https://hdl.handle.net/11147/16291
Name Variants
�zdemirel, Barbaros
Ozdemirel, Barbaros
Ozdemirel, B.
Ozdemirel, B
Özdemirel, B.
Job Title
Email Address
barbarosozdemirel@iyte.edu.tr
Main Affiliation
03.05. Department of Electrical and Electronics Engineering
Status
Former Staff
Website
ORCID ID
0000-0002-2525-343X
Scopus Author ID
56712818400
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
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GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
0
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QUALITY EDUCATION4
QUALITY EDUCATION
0
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GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
0
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
0
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
Research Products
SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
CLIMATE ACTION13
CLIMATE ACTION
0
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
0
Research Products
LIFE ON LAND15
LIFE ON LAND
0
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
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PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents

4

Citations

24

h-index

3

Go to Scopus profile
This researcher does not have a WoS ID.
Scholarly Output

9

Articles

3

Views / Downloads

14247/7057

Supervised MSc Theses

3

Supervised PhD Theses

0

WoS Citation Count

22

Scopus Citation Count

24

Patents

0

Projects

1

WoS Citations per Publication

2.44

Scopus Citations per Publication

2.67

Open Access Source

8

Supervised Theses

3

JournalCount
2015 23rd Signal Processing and Communications Applications Conference, SIU 2015 - Proceedings1
4. Türkiye Robotbilim Konferansı, ToRK 20181
Computer Applications in Engineering Education1
IET Control Theory and Applications1
Journal of Medical Devices, Transactions of the ASME1
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Scholarly Output Search Results

Now showing 1 - 9 of 9
  • Conference Object
    Neuroboscope Sisteminin Model Tabanlı Sınaması
    (Otomatik Kontrol Türk Milli Komitesi, 2016) Uzun, Bengisu; Ayav, Tolga; Dede, Mehmet İsmet Can; Berker, Mustafa; Işıkay, İlkay; Hanalioğlu, Şahin; Özdemirel, Barbaros; Kiper, Gökhan; Tatlıcıoğlu, Enver; Maaroof, Omar W.; Işıtman, Oğulcan; Ateş, Gizem; Yaşır, Abdullah
    NeuRoboScope projesinde, endoskopik hipofiz cerrahisinde kullanılan optik-kamera sisteminin, cerrahın kullandığı cerrahi aletleri takip ederek yönlendirilmesini amaçlayan emniyet kritik bir sistemin tasarlanması amaçlanmıştır. Bu bildiri, sistem gereksinimleri üzerinden tüm sistemin modellenmesini ve oluşturulan bu modelin sınanmasını ele almaktadır. Böylece, tasarım evresinden önce tasarımın dayanağı olan sistem gereksinimlerinin doğrulanması hedeflenmiştir. Sistem bir zamanlı otomat ağı olarak modellenmiş ve UPPAAL model sınama aracı kullanılarak, sistemin başta emniyet kritik olmak üzere diğer önemli özellikleri sınanmıştır.
  • Conference Object
    Citation - Scopus: 1
    Modelling Twin Rotor System With Artificial Neural Networks
    (Institute of Electrical and Electronics Engineers Inc., 2015) Deniz, Meryem; Bıdıklı, Barış; Bayrak, Alper; Özdemirel, Barbaros; Tatlıcıoğlu, Enver
    In this study, the input output relation of the twin rotor system which was constructed in our laboratory is obtained by using ANNs. When compared with the existing literature, main advantage of this modelling approach is that multi input multi output ANN structure is used preferred. As a result of this approach, the cross coupling effects, between the rotors and also between the outputs, are taken into consideration. Thus, we sincerely believe that the obtained input output model demonstrates a close behavior to the real system.
  • Conference Object
    Cerrahın Anlık Yönlendirilebildiği Robot Yardımlı Endoskop Kontrol Sistemi Mimarisi - Neuroboscope
    (Boğaziçi Üniversitesi, 2018) Dede, Mehmet İsmet Can; Kiper, Gökhan; Ayav, Tolga; Tatlıcıoğlu, Enver; Özdemirel, Barbaros; Maaroof, Omar; Ateş, Gizem; Berker, Mustafa; Işıkay, İlkay; Hanalioğlu, Şahin
    Bu bildiride ele alınan çalışmada endoskopik hipofiz cerrahisinde kullanılan optik-kamera sistemini, cerrahın anlık isteklerini takip ederek yönlendirilmesine izin verecek robotik sistem geliştirilmektedir. Cerrah kendisi ameliyat sahasında ameliyatı gerçekleştirirken robotu yönlendirmesi gerekmektedir. Bu gereksinim için geliştirilmekte olan özgün alt bileşenler ve toplam sistem mimarisi bildiri içinde tanıtılmıştır ve çalışmanın sonuçları benzer minimal invaziv ameliyatların robot destekli ameliyata dönüşmesine imkan verebilecektir. Bildiride sistemin gereksinimlerinin oluşturulması için yapılan testler anlatılmıştır. Üzerinde durulan sistem gereksinimlerinden birisi robotun çalışma alanı, diğeri ise cerrahın kullanım kolaylığı ile ilgilidir.
  • Master Thesis
    Brushless Dc Motor Control Under Varying Load Conditions
    (Izmir Institute of Technology, 2017) Kara, Salih Murat; Özdemirel, Barbaros
    Brushless direct current motors (BLDCMs) are popular in various applications due to their high-power density, wide speed range and control flexibility. They work without brushes and require electronic commutation, where stator's currunt state is synchronized with rotor position. Various methods are used to determine the rotor position. Sensorless method of position detection is preferable instead of external sensors, because external sensors are not cost effective and they create wiring complexity. This thesis presents control methods and driver algorithms for BLDCM under variable load conditions from start-up to continuous run with speed regulation. The inductive sense method, which is one of the sensorless position measurement methods, is used when the motor is stationary and at low speed. The rotor position was accurately calculated by using this method based on inductance differences. Afterwards, back electromotive force (BEMF) sense method was used at high speed.The drive parameters, mainly the step time and excitation step, are adjusted according to the rotor position to drive the motor efficiently. The dynamic control of the drive parameters is done by estimating the load with the rotor position.
  • Article
    Citation - WoS: 5
    Citation - Scopus: 5
    Robust Output Tracking Control of an Unmanned Aerial Vehicle Subject To Additive State Dependent Disturbance
    (Institution of Engineering and Technology, 2016) Tanyer, İlker; Tatlıcıoglu, Enver; Zergeroglu, Erkan; Deniz, Meryem; Bayrak, Alper; Özdemirel, Barbaros
    In this study, an asymptotic tracking controller is developed for an aircraft model subject to additive, state-dependent, non-linear disturbance-like terms. Dynamic inversion technique in conjunction with robust integral of the sign of the error term is utilised in the controller design. Compared to the previous studies, the need of acceleration measurements of the aircraft have been removed. In addition, the proposed controller design utilises only the output of aircraft dynamics. Lyapunov based analysis is applied to prove global asymptotic convergence of the tracking error signal. Numerical simulation results are presented to illustrate the performance of the proposed robust controller.
  • Master Thesis
    Inertial Measurement Units for Motion Control of Surgical Endoscopic Robot
    (Izmir Institute of Technology, 2018) Erat, Sercan; Özdemirel, Barbaros
    Inertial measurement units (IMUs) are preferable over other electromechanical user interfaces for robotics applications that require hands-free operation. In case of a surgical endoscopic robot, one of the requirements is a user interface that gives the surgeon ability to control the camera position while holding other surgical tools. An IMU used for this purpose should provide precise position information in a small motion range restricted by a few degrees of rotation. In this study, major difficulties in establishing a user interface between an IMU and a surgical robotic arm are identified, and the necessary solutions for implementation of such an interface are presented. The study focuses on the IMU devices that combine accelerometers and gyroscopes based on micro-electromechanical systems (MEMS) technology because of their smaller size and low power requirement. Working principles and the calibration techniques of MEMS IMUs are reviewed. Three fusion algorithms that combine accelerometer and gyroscope data to determine the orientation of an object in three-dimensional space are implemented. Performance of these fusion algorithms and critical specifications of MEMS IMUs from three different manufacturers are evaluated by monitoring sensor data through a wireless interface. A graphical evaluation software was developed to test position mapping methods by steering field of view of a hypothetical camera towards randomly determined targets on the computer screen. Effectiveness of the position mapping methods was evaluated by several users by comparing the total angular displacement and the elapsed time required to reach a number of simulated targets.
  • Article
    Citation - WoS: 6
    Citation - Scopus: 7
    Human-Robot Interfaces of the Neuroboscope: a Minimally Invasive Endoscopic Pituitary Tumor Surgery Robotic Assistance System
    (ASME, 2021) Dede, Mehmet İsmet Can; Kiper, Gökhan; Ayav, Tolga; Özdemirel, Barbaros; Tatlıcıoğlu, Enver; Hanalioğlu, Şahin; Işıkay, İlkay
    Endoscopic endonasal surgery is a commonly practiced minimally invasive neurosurgical operation for the treatment of a wide range of skull base pathologies including pituitary tumors. A common shortcoming of this surgery is the necessity of a third hand when the endoscope has to be handled to allow active use of both hands of the main surgeon. The robot surgery assistant NeuRoboScope system has been developed to take over the endoscope from the main surgeon's hand while providing the surgeon with the necessary means of controlling the location and direction of the endoscope. One of the main novelties of the NeuRoboScope system is its human-robot interface designs which regulate and facilitate the interaction between the surgeon and the robot assistant. The human-robot interaction design of the NeuRoboScope system is investigated in two domains: direct physical interaction (DPI) and master-slave teleoperation (MST). The user study indicating the learning curve and ease of use of the MST is given and this paper is concluded via providing the reader with an outlook of possible new human-robot interfaces for the robot assisted surgery systems.
  • Article
    Citation - WoS: 11
    Citation - Scopus: 11
    Design of an Experimental Twin-Rotor Multi-Input Multi-Output System
    (John Wiley and Sons Inc., 2015) Bayrak, Alper; Doğan, Fırat; Tatlıcıoğlu, Enver; Özdemirel, Barbaros
    Twin-rotor multi-input multi-output system (TRMS) is a popular experimental setup utilized mostly for development and evaluation of aerovehicle control algorithms. Motivated by its popularity, construction steps of a TRMS setup in an academic setting are presented in this paper. Specifically, design of mechanical and electronic hardware components and development of related computer software are described in detail. Preliminary experiment results are also presented to demonstrate the performance of the system. © 2015 Wiley Periodicals, Inc.
  • Master Thesis
    Correction of Errors Due To Radial Run-Out in Absolute Rotary Encoders
    (Izmir Institute of Technology, 2018) Cirit, Mehmet Onur; Özdemirel, Barbaros
    This thesis proposes a novel, general purpose correction algorithm for analog absolute rotary encoders to eliminate errors due to radial run-out of the shaft. Unlike traditional quadrature encoders, four sensors were employed that produce four quadrature signals instead of two. The radial variation of the field intensity was exploited to identify the direction and extent of radial run-out and correction was applied to poorly identified position values accordingly. A simulation environment was created from the scratch to simulate encoder signals under the influence of shaft run-out in order to verify the performance of the algorithm. The numerical results were collected in each milestone of the development and results were presented both for overall performance and for a number of special cases. The issues occurring in the first iterations of the algorithm, such as error mismatch and singularities, were identified and resolved in a stepwise manner. The final version of the algorithm has shown significant improvement and successfully reduced the mean error in angular position down to 12% of the initial value.