Person: KIYAK, İSMAİL
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KIYAK
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İSMAİL
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Publication Open Access Experimental wavelet transient-state analysis of electrical machines directly feeding by photovoltaic cells(2009-01-01) KIYAK, İSMAİL; Onat N., Kiyak İ., Gökmen G.This work describes an experimental wavelet packet transient state analysis for educational purposes. The study particularly deals with electrical machines directly fed by photovoltaic cells. In a PV system design, the selection and proper installation of appropriatelysized components directly affects system reliability, lifetime and initial cost. In any installation, one must keep in mind that trade-ojjs are necessary in system design and component selection. In this study, the startup and nominal operating behaviors of electrical machines directly connected to a photovoltaic system (not having any storage or control system) were empirically examined. The power values obtained (in p.u.) were decomposed to sub-frequency components by means of the discrete wavelet packet transformation then they were compared to each other.Publication Open Access Hand recognition solution as conference room intelligent lighting control technique(2023-01-01) BÖCEKÇİ, VEYSEL GÖKHAN; KIYAK, İSMAİL; Karail A., BÖCEKÇİ V. G., KIYAK İ.In communication technologies, it can be solved in systems that are extremely simple, detailed, among the tools for use in the electronic environment, internet-connected, development and integrated systems. With the rapid development of technology, smart led lamps, smart office, smart conference room lighting, road lighting fixtures and therefore smart lighting systems have been the reason why smart lighting systems can enter daily life rapidly. Sensors which are the components of smart lighting systems, feedback from users, cloud services, smart algorithms become more widespread with artificial intelligence in an easier, faster, and more economical way, causing a change in traditional lighting control and improvements in energy saving, functionality, and user centered lighting. In this study, the mediapipe framework is intended to be used for office conference room. MediaPipe is indeed an open-source framework that enables the processing of computer vision data, including video and audio. The lighting system was built using the artificial intelligence supported mediapipe hand recognition solution, and artificial intelligence and image processing algorithms were used. Each hand gesture corresponds to a different command to control the light. There are 3 main menus are determined for the hand and defined to the system. Main menus can be reached with every hand movement. After entering the main menu, intermediate menus are processed. Lighting application can be realized through control commands obtained by hand movements, digital/analog information conversion and Dali control system. It is concluded that the ease of control brought by this method is more advantageous in terms of its purpose than other methods because it is contactless and does not require any hardware device in the hands of the presenter.Publication Open Access Technoeconomic Performance Analysis of Solar Tracking Methods for Roof-Type Solar Power Plants and Electric Vehicle Charging Stations(HINDAWI LTD, 2021-04-06) KIYAK, İSMAİL; Boyekin, Tahsin; Kiyak, IsmailIn building integrated photovoltaic (BIPV) solar energy projects, cost effectiveness, durability, and long-term reliability are among the criteria that should be taken into consideration as well as the gain in electricity generation efficiency. Also, in a study, it is stated that a dual-axis solar tracking system occupies approximately 100% more space than a single-axis system and 160% more than a fixed-angle system. It has been observed that most of the studies that are mounted on the building and include a tracking system are small-scale experimental studies. The aim of this article is to present a systematic analysis with a low investment cost, a low operating cost, and high reliability, in a real application especially for roof applications in buildings. Three buildings in the same location and with the same roof area were selected. Photovoltaic power plants with 23.68 kW power were installed; these panels had three types: fixed-angle, manually controlled, and single-axis solar tracking systems. The energy generation system is connected to the network with a double-sided meter, and there is a double-sided energy flow. The energy produced is used to meet the energy needs of the vehicle charging station and common areas of the buildings. Although the single-axis tracking system is 27.85% more efficient than other energy generation methods, the manually adjusted method has proven to have the shortest amortization time. The study also presents shading, which is a serious problem in large-scale roof projects, and the area covered by the module per unit watt produced.Publication Metadata only RFID based indoor localization for autonomous guided vehicles application and management panel(2023-10-02) KIYAK, İSMAİL; Emanet B., KIYAK İ.Today, especially since 2020, after the Covid-19 pandemic, intensive cargo transportation has made a breakthrough regardless of large or small scale. Especially during the pandemic period, people frequently shopped on e-commerce websites, causing a serious logistics business volume here. Logistics companies had difficulty in responding to this density and went to different solutions. These have created various business volumes, especially in the field of indust- rial automation. In this thesis, it is aimed to design a low-cost RFID-based autonomous guided vehicle design and management panel that can respond to the problem of in-house product distribution speed of small-scale enterprises, which can systematically track and distribute products in warehouses. A simulation of the product to be implemented in this project has been made. A 1:5 scale prototype of the product to be used in real life was prepared and studies were carried out. The vehicle included RFID receiver, accelerometer/gyro sensor (IMU), stepper motor, stepper motor dri- ver, microprocessor (MCU) and PC throughout the work. The shortest path algorithm developed within the scope of the study was carried out in order for the vehicle to perform the tasks given at the optimum speed within the area determined here.Publication Metadata only Uses of light emitting diode led light as an active ingredient in medical treatments a review study(2022-11-26) KIYAK, İSMAİL; KIYAK İ., Kamber B. r. , Keskintaş S., Koçak E.Publication Metadata only Smart indoor LED lighting design powered by hybrid renewable energy systems(ELSEVIER SCIENCE SA, 2017) ORAL, BÜLENT; Kiyak, Ismail; Oral, Bulent; Topuz, VedatIt's important to provide diversity in energy resources and to use sustainable energy resources besides local resources. In the recent years, LEDs have been increasingly used in interior lighting systems because of their low energy consumption, high light-flux efficiency and their ability to maintain the light-flux value at a constant level for a long period of time. In this study, a LED luminaire was designed by using the Osram Coinstar W4 brand power LED module. An LED drive card, which is a specialty of the luminaire, was designed to provide ideal functioning conditions and serve as a power supply for the LEDs. A communication card was designed for all kinds of information exchange between the LED luminaires, motion detectors and light sensors used with the laboratory lighting system, and an RS485 communication line was installed to connect every system. Under the control of the luminaire, the lighting was tested by a fuzzy-expert system. With this project design and test, a system was developed that can be used in interior spaces. (C) 2017 Elsevier B.V. All rights reserved.Publication Open Access Lifetime Prediction for a Cell-on-Board (COB) Light Source Based on the Adaptive Neuro-Fuzzy Inference System (ANFIS)(HINDAWI LTD, 2021-03-30) GÖKMEN, GÖKHAN; Kiyak, Ismail; Gokmen, Gokhan; Kocyigit, GokhanPredicting the lifetime of a LED lighting system is important for the implementation of design specifications and comparative analysis of the financial competition of various illuminating systems. Most lifetime information published by LED manufacturers and standardization organizations is limited to certain temperature and current values. However, as a result of different working and ambient conditions throughout the whole operating period, significant differences in lifetimes can be observed. In this article, an advanced method of lifetime prediction is proposed considering the initial task areas and the statistical characteristics of the study values obtained in the accelerated fragmentation test. This study proposes a new method to predict the lifetime of COB LED using an artificial intelligence approach and LM-80 data. Accordingly, a database with 6000 hours of LM-80 data was created using the Neuro-Fuzzy (ANFIS) algorithm, and a highly accurate lifetime prediction method was developed. This method reveals an approximate similarity of 99.8506% with the benchmark lifetime. The proposed methodology may provide a useful guideline to lifetime predictions of LED-related products which can also be adapted to different operating conditions in a shorter time compared to conventional methods. At the same time, this method can be used in the life prediction of nanosensors and can be produced with the 3D technique.Publication Metadata only Modeling of dimmable High Power LED illumination distribution using ANFIS on the isolated area(PERGAMON-ELSEVIER SCIENCE LTD, 2011) ORAL, BÜLENT; Kiyak, Ismail; Topuz, Vedat; Oral, BulentHigh power light emitting diodes (HP-LEDs) are more suitable for energy saving applications and have becoming replacing traditional fluorescent and incandescent bulbs for its energy efficient. Therefore. HP-LED lighting has been regarded in the next-generation lighting. In this study, illumination distribution of white color HP-LED is modeled by adaptive neuro-fuzzy inference system (ANFIS) approach on the isolated area while LED head is fixed. Subtractive clustering with hybrid learning approach is used to train the realized ANFIS architectures. End of the numerous experiment we finally concluded that, ANFIS could be used to modeling the illumination distribution applications perfectly. (C) 2011 Elsevier Ltd. All rights reserved.Publication Open Access Wavelength tune of InGaN based blue LEDs by changing indium percentage and operational voltage variables(2022-07-01) KIYAK, İSMAİL; KIYAK İ., Geçer B.Blue light-emitting-diodes (LEDs) are special and different than the other LEDs due to their high-efficient lighting. They have large badgap energy. So gallium nitrides are mostly used during designing blue light. This application focus on the emission properties of a InGaN LED. The emission intensity, energy diagram, spectrum, and efficiency are calculated for an applied voltage. The indium and GaN composition in the blue LED can be varied to control the emission wavelength. In here, composition of InGaN and operational voltage values were varied to control wavelength. Effects of the different InGaN composition and different voltage values were given in results as comprehensively for 5 different simulations. This study is dissimilar than other wavelength studies due to used original parameter values and wavelength compared methods for many situations about InGaN percentage and voltage values. As a result of simulations, we can infer that the high In_x percentage in composition and high voltage makes wavelength gap of an blue LED largerPublication Open Access Elektrikli Taşıtlarda Kullanılan İndüksiyon / Sabit Mıknatıslı Motor_x000D_ Sürücülerinin Simülasyonu ve Motor Dinamiklerinin Analizi(2020-06-30) KIYAK, İSMAİL; Koray Yılmaz KAYA;İsmail KIYAKBu makalede, elektrikli araçlarda kullanılan motor çeşitlerinden sincap kafesli indüksiyon motor ve sabit mıknatıslı senkronmotorun yapısal özellikleri ve hız dinamikleri karşılaştırılmıştır. Karşılaştırılmanın doğru yapılabilmesi için aynı tork alt ındabenzer parametrelere sahip motorlar, alan odaklı kontrol (FOC) yöntemi ile sürülmüştür. Motorların hızlanma ve yavaşlamaesnasında geçici hal durumları simülasyon ortamında incelemiş ve karşılaştırılmıştır. Sonuçlar göstermektedir ki indüksiyonmotorları hız değişimlerine daha çabuk tepki gösterirken, sabit mıknatıslı motorlar daha geç tepki vermektedir. Bunun yanındasabit mıknatıslı motorların tork gerektiren kalkış anlarında daha iyi performans gösterdiği anlaşılmıştır. Simülasyon PSIMprogramı kullanılarak gerçekleştirilmiştir. Simülasyonda kullanılan motor sürücülerin anahtarlama frekansı, giriş gerilimlerivb. parametreler aynı seçilmiştir.