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Research Interests:
Robots, which have mostly been effective in areas such as industrial, agricultural, and production facilities, have started to take a place in the service sector, as their technologies have become lower in cost and more easily accessible.... more
Robots, which have mostly been effective in areas such as industrial, agricultural, and production facilities, have started to take a place in the service sector, as their technologies have become lower in cost and more easily accessible. This situation has attracted the attention of companies and researchers and has accelerated studies on this subject. In this study, an algorithm was developed for the autonomous mobile robot to serve in industrial areas. In line with this study, it was ensured that the autonomous mobile robot mapped the working environment, determined the working station in this environment, and then carried out transport operations between these working stations in accordance with a given work order. After the mobile robot fulfilled the work order, it went into a waiting state until a new work order was received. For the mobile robot to save energy, it was ensured that it waited close to the point where the work order came in the most, by means of machine learning...
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This study aims at designing an embedded controller that can stabilize custom designed self-balancing two-wheeled robot (TWSBR) using velocity feedback alone. A state-space model for the custom designed TWSBR is obtained through dynamic... more
This study aims at designing an embedded controller that can stabilize custom designed self-balancing two-wheeled robot (TWSBR) using velocity feedback alone. A state-space model for the custom designed TWSBR is obtained through dynamic analysis using a Lagrangian method. System identification experiments are proposed and performed to identify the parameters of the model. Based on the identified model, an LQR controller, which is a combination of optimal estimation and optimal control, is designed and implemented that can successfully stabilize TWSBMR. At last, few tests are carried out to evaluate the performance of the controller, showing how the proposed LQR controller outperforms classical controller in many aspects.
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One of the most important limitations to be considered in the design phase of the embedded system is the energy consumption. The energy consumption is more efficient, especially in the embedded devices fed by the battery, because the... more
One of the most important limitations to be considered in the design phase of the embedded system is the energy consumption. The energy consumption is more efficient, especially in the embedded devices fed by the battery, because the charging time is an obstacle to the use of the device. In addition, energy efficiency in terms of power dissipation and system health is important in other embedded applications such as biomedical, test and measurement, industrial control and robots. Reducing energy consumption during the design phase of the embedded system is generally considered as the task of the hardware. In fact, the software should also undertake the task of improving energy efficiency. In this research, the control algorithm of the embedded system is written in two different methods and their energy consumption was compared.
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Research Interests:
Research Interests:
ABSTRACT The design of a digital temperature transmitter based on mixed signal controller is introduced. The hardware is simplified with the peripheral feature integrated in controller 8051F350, and reliability is improved. The interface... more
ABSTRACT The design of a digital temperature transmitter based on mixed signal controller is introduced. The hardware is simplified with the peripheral feature integrated in controller 8051F350, and reliability is improved. The interface of thermocouple with programmable gain amplifier through A/D converter in mixed signal controller and USB interface with master computer is presented. Keeping an eye on the viability of the complete system as a commercial product, on chip temperature sensor has been considered for sensing the reference junction temperature. The non-linear output compensation and cold-junction compensation of thermocouple is provided by real time embedded software.
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This paper presents the author's experiences using a low-cost microcontroller evaluation board and a commercially available real-time operating system in the laboratory component of an undergraduate embedded and real time system... more
This paper presents the author's experiences using a low-cost microcontroller evaluation board and a commercially available real-time operating system in the laboratory component of an undergraduate embedded and real time system design course. This course covers both hardware and software topics in embedded and real time systems, and the course culminates in a final team-based design project to promote the students to study the building units of embedded and real time system, to achieve fundamental knowledge acquisition on embedded system, hardware and software design experiences, teamwork and problem-solving skills with the higher-order thinking.
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A sizing procedure is developed for hybrid system with the aid of mathematical models for photovoltaic cell, wind turbine, and battery that are readily present in the literature. This sizing procedure can simulate the annual performance... more
A sizing procedure is developed for hybrid system with the aid of mathematical models for photovoltaic cell, wind turbine, and battery that are readily present in the literature. This sizing procedure can simulate the annual performance of different kinds of photovoltaic-wind hybrid power system structures for an identified set of renewable resources, which fulfills technical limitations with the lowest energy cost. The output of the program will display the performance of the system during the year, the total cost of the system, and the best size for the PV-generator, wind generator, and battery capacity. Security lightning application is selected, whereas system performance data and environmental operating conditions are measured and stored. This hybrid system, which includes a PV, wind turbine, inverter, and a battery, was installed to supply energy to 24 W lamps, considering that the renewable energy resources of this site where the system was installed were 1700 Wh/m2/day solar...
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To quantify the potential for performance improvements of photovoltaic-wind hybrid energy systems, a test facility has been installed at the Solar Energy Institute, Ege University. Hybrid system consist of a wind turbine, PV array,... more
To quantify the potential for performance improvements of photovoltaic-wind hybrid energy systems, a test facility has been installed at the Solar Energy Institute, Ege University. Hybrid system consist of a wind turbine, PV array, battery, AC and DC loads, inverters, charge regulators and a data logging and control unit. The collected data are first conditioned using precision electronic circuits and then interfaced to a PC using a data logging unit. The LABVIEW program is used to further process, display and store the collected data in the PC disk. The proposed data logging and control unit permits the rapid system development and has the advantage of flexibility in the case of changes, while it can be easily extended for controlling the of photovoltaic-wind hybrid energy system operation.
This paper reports an investigation to develop a PV-Wind hybrid power system simulation model to maximize the renewable energy production. The investigated model is based on photovoltaic and wind generators are connected to a stand-alone... more
This paper reports an investigation to develop a PV-Wind hybrid power system simulation model to maximize the renewable energy production. The investigated model is based on photovoltaic and wind generators are connected to a stand-alone system supported by a battery bank. First, the system is sized according to the electric demand and the availability of renewable energy resources. Then, each component of the hybrid power system is dynamically modeled in order to maximize the renewable energy and to analyze the instabilities that affect the energy production. The investigated model needs hourly solar radiation data from the site for the hybrid system and the anticipated load data to predict the general performance of the system. Simulation studies were carried out using MATLAB Simulink software package.
... Dr., Ege Üniversitesi Ege Meslek Yüksekokulu Elektronik Teknolojisi Programı, Bornova, 35100, İzmir, mustafa.engin@ege.edu.tr Page 2. CB Ü Soma Meslek Yüksekokulu Teknik Bilimler Dergisi Yıl:2010 Cilt:2 Sayı: 13 12 üretmek mümkün... more
... Dr., Ege Üniversitesi Ege Meslek Yüksekokulu Elektronik Teknolojisi Programı, Bornova, 35100, İzmir, mustafa.engin@ege.edu.tr Page 2. CB Ü Soma Meslek Yüksekokulu Teknik Bilimler Dergisi Yıl:2010 Cilt:2 Sayı: 13 12 üretmek mümkün olmayabilir. Aynı şekilde bahar ve yaz ...
In this paper, a solar-wind hybrid power generating, system that will be used for security lighting was designed. Hybrid system was installed and solar cells, wind turbine, battery bank, charge regulators and inverter performance values... more
In this paper, a solar-wind hybrid power generating, system that will be used for security lighting was designed. Hybrid system was installed and solar cells, wind turbine, battery bank, charge regulators and inverter performance values were measured through the whole year. Using measured values of overall system efficiency, reliability, demanded energy cost per kWh were calculated, and percentage of generated energy according to resources were defined. We also include in the paper a discussion of new strategies to improve hybrid power generating system performance and demanded energy cost per kWh.
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Research Interests:
B u calismanin amaci gunes pili ile yaprak alaninin olculmesidir. Bu amacla alti adet seri hucreden olusan 7x10 cm2 ve 5x7 cm2'lik amorf silisyum gunes pilleri kullanilmis ve cesitli alanlarla golgelenerek alan-akim ve alan-gerilim... more
B u calismanin amaci gunes pili ile yaprak alaninin olculmesidir. Bu amacla alti adet seri hucreden olusan 7x10 cm2 ve 5x7 cm2'lik amorf silisyum gunes pilleri kullanilmis ve cesitli alanlarla golgelenerek alan-akim ve alan-gerilim grafikleri cikarilmistir. Calismalarda once gunes pili uzerinde golgeleme yapilmis, ancak seri bagli hucrelerden olusan gunes pilinin kismi golgelenmesi sonucu ayni alanlar farkli geometrik sekiller icin farkli akim degerleri ile ifade edilmistir. Bunun uzerine isik kaynagi uzerinde golgeleme ile isik miktari degistirilerek olcumler tekrarlanmistir. Alan-akim ve alan-gerilim egrileri alan ile gunes pili akimindaki degismenin oldukca dogrusal oldugunu gostermektedir
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In this study, an embedded system that performs compensation of the thermocouple output characteristic curve nonlinearities was designed. Mixed-signal microcontroller's peripheral units are used to amplify the low output voltage of... more
In this study, an embedded system that performs compensation of the thermocouple output characteristic curve nonlinearities was designed. Mixed-signal microcontroller's peripheral units are used to amplify the low output voltage of the thermocouple to a desired level and and converted to digital without additional circuit elements, and noise reduction is implemented with a digital filter. Cold junction compensation is implemented by the temperature sensor in the integrated circuit and thereafter output curve is linearized by look-up table and linear interpolation methods in the developed software. The developed algorithm is applied to a T type thermocouple and obtained results are presented.
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Research Interests:
An embedded system that contains hardware and software was developed for two-axis solar tracking system to improve photovoltaic panel utilization. The hardware section of the embedded system consists of a 32-bit ARM core microcontroller,... more
An embedded system that contains hardware and software was developed for two-axis solar tracking system to improve photovoltaic panel utilization. The hardware section of the embedded system consists of a 32-bit ARM core microcontroller, motor driver circuits, a motion control unit, pyranometer, GPS receiver, and an anemometer. The real-time control algorithm enables the solar tracker to operate automatically without external control as a stand-alone system, combining the advantages of the open-loop and the closed-loop control methods. The pyranometer is employed to continuously send radiation data to the controller if the measured radiation is above the lower radiation limit the photovoltaic panel can generate power, guaranteeing the solar tracking process to be highly efficient. The anemometer is utilized in the system to ensure that the solar tracking procedure halts under high wind speed conditions to protect the entire system. Latitude, longitude, altitude, date, and real-time ...
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A simulation modelling of a hybrid Photovoltaic/Thermal collector system has been developed. This model includes calculation of beam and diffuse components of hourly radiation on a tilted surface using the measured hourly solar radiation.... more
A simulation modelling of a hybrid Photovoltaic/Thermal collector system has been developed. This model includes calculation of beam and diffuse components of hourly radiation on a tilted surface using the measured hourly solar radiation. The choice and structure details on the selected materials are given. The thermal and electrical efficiencies of this system have been studied using the measured collector and tank water, ambient and cell temperatures, wind and solar data, and the electrical quantities of the solar panel. In this paper, the mathematical model is set for this prototype and simulated using a software program. This PV/T system prototype is constructed on the roof of Ege University Solar Energy Institute and examined for the total (electrical and thermal) efficiency.
This paper presents an embedded mechatronic system that tracks sun for improving photovoltaic panel performance with low power consumption. The electronics part of this sun tracker consists of a DC motor driven by an ARM core... more
This paper presents an embedded mechatronic system that tracks sun for improving photovoltaic panel performance with low power consumption. The electronics part of this sun tracker consists of a DC motor driven by an ARM core microcontroller, and motor driving circuit with feedback sensors. Developed real-time control algorithm combines the open-loop and the closed-loop control methods to improve performance and reliability of the two-axis sun tracker. Energy gain issues are taken into account, which implies besides other issues, the sun is not continually tracked with the same exactitude, overconsumption by the motors. Experimental results of two-axis sun tracker are presented together with the fixed one.
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In this study, PID control algorithm for a level control system is designed and applied to a programmable logic controller in order to meet the requirements of engineering students' hands on training on PID control of processes. The... more
In this study, PID control algorithm for a level control system is designed and applied to a programmable logic controller in order to meet the requirements of engineering students' hands on training on PID control of processes. The auto-tuning mode of operation based on PID analog measurements in a closed-loop control system is preferred to present how stable, less time consuming solution it is. Trial and error method is also used for determining PID parameters in order to compare the results with the auto-tuning method.
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The overall objective of this study is to develop a control algorithm that improves performance and reliability of the two-axis solar tracker, focusing on optimization of the controller board, drive hardware and software. An embedded... more
The overall objective of this study is to develop a control algorithm that improves performance and reliability of the two-axis solar tracker, focusing on optimization of the controller board, drive hardware and software. An embedded two-axis solar tracking system and real-time control algorithm was developed for improving photovoltaic panel utilization. The system consists of a microcontroller, two motor-control modules, two DC motors, feedback devices, and other sensors needed for robust operation. The real-time control algorithm enables the solar tracker to be used as a stand-alone system, which can operate automatically without external control. The system combines two different control methods: the open-loop method and the closed-loop method. An experimental prototype was built and field results have proven the good performance of the developed tracking system.
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Research Interests:
Research Interests:
Research Interests:
In this study, an artificial neural network, which runs on a real-time controller to obtain outputs of nonlinear multivariable system is presented. Within the scope of the study, forward kinematics problems of a 6 DOF articulated... more
In this study, an artificial neural network, which runs on a real-time controller to obtain outputs of nonlinear multivariable system is presented. Within the scope of the study, forward kinematics problems of a 6 DOF articulated manipulator has been used for the case study of a nonlinear system. An artificial neural network has been trained for forward kinematics problem and implemented on a PLC to predict the responses of the nonlinear systems on real-time. Also an HMI was used for the observation of system responses and serve as an input device. As a conclusion, an embedded real-time system that successfully works with trained artificial neural network, has been implemented on a common nonlinear case.
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The monitoring system in photovoltaic power generating system is very important and crucial in some cases for evaluating, troubleshooting and in decision making issue. This paper proposes very simple and low cost an embedded data logger... more
The monitoring system in photovoltaic power generating system is very important and crucial in some cases for evaluating, troubleshooting and in decision making issue. This paper proposes very simple and low cost an embedded data logger with the high reliability and high precision for monitoring PV power generating system. The data logger meets all of the relevant requirements in terms of accuracy included in the International Electro technical Commission (IEC) standards for PV systems. The implementation process, including design and development of the hardware and software, is explained in detail. The electrical and meteorological sensor outputs are first conditioned according to microcontroller analogue to digital converter input needs using precision electronic amplifier and active filter circuits and then digitized and processed using 32 bit ARM Cortex M4 core microcontroller. Some sample deployment and measurement results are also presented to demonstrate the usefulness of the monitoring system.
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Research Interests:
... aydınlatma uygulamalarında sıkça karşılaşılan bu durum kış aylarında artan rüzgar potansiyeli ile kısmi de olsa kapatılmıştır. Sistem kış aylarında yükü 210 saat enerjisiz bırakmıştır. Tüketilen enerjinin birim maliyeti 0.85 $/kWh... more
... aydınlatma uygulamalarında sıkça karşılaşılan bu durum kış aylarında artan rüzgar potansiyeli ile kısmi de olsa kapatılmıştır. Sistem kış aylarında yükü 210 saat enerjisiz bırakmıştır. Tüketilen enerjinin birim maliyeti 0.85 $/kWh olarak hesaplanmıştır (Engin ve arkadaşları, 2003). ...
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The monitoring system in photovoltaic power generating system is very important and crucial in some cases for evaluating, troubleshooting and in decision making issue. This paper proposes very simple and low cost an embedded data logger... more
The monitoring system in photovoltaic power generating system is very important and crucial in some cases for evaluating, troubleshooting and in decision making issue. This paper proposes very simple and low cost an embedded data logger with the high reliability and high precision for monitoring PV power generating system. The data logger meets all of the relevant requirements in terms of accuracy included in the International Electro technical Commission (IEC) standards for PV systems. The implementation process, including design and development of the hardware and software, is explained in detail. The electrical and meteorological sensor outputs are first conditioned according to microcontroller analogue to digital converter input needs using precision electronic amplifier and active filter circuits and then digitized and processed using 32 bit ARM Cortex M4 core microcontroller. Some sample deployment and measurement results are also presented to demonstrate the usefulness of the...
Research Interests:
In this paper, a solar-wind hybrid power generating, system that will be used for security lighting was designed. Hybrid system was installed and solar cells, wind turbine, battery bank, charge regulators and inverter performance values... more
In this paper, a solar-wind hybrid power generating, system that will be used for security lighting was designed. Hybrid system was installed and solar cells, wind turbine, battery bank, charge regulators and inverter performance values were measured through the whole year. Using measured values of overall system efficiency, reliability, demanded energy cost per kWh were calculated, and percentage of generated energy according to resources were defined. We also include in the paper a discussion of new strategies to improve hybrid power generating system performance and demanded energy cost per kWh.
Research Interests:
In this paper, a pre-feasibility study of using PV-based hybrid energy system to provide electricity to a residential area in west coast of Turkey is examined. The selected case study represents a power demand of 12.6kWh day-1 with a 2.9... more
In this paper, a pre-feasibility study of using PV-based hybrid energy system to provide electricity to a residential area in west coast of Turkey is examined. The selected case study represents a power demand of 12.6kWh day-1 with a 2.9 kW peak power demand. The power system used in this study contains diesel generator, grid connection and PV modules with backup storage. The energy system was redesigned and optimized as PV based in order to meet the existing user’s power demand at a minimum cost of energy. Temperature and solar radiation data obtained from Ege University meteorology station has been used in the simulation process through optimization software, HOMER. Three systems that were considered in this study area are stand-alone PV-diesel, stand-alone PV-battery and grid connected PV system. The proposed systems then were compared regarding on their operational characteristics and cost values. The comparisons prove that grid connected PV energy system had the lowest total ne...
Sizing of wind and photovoltaic generators ensures lower operational costs and therefore, is considered as an important issue. An approach for sizing along with a best management technique for a PV-wind hybrid system with batteries is... more
Sizing of wind and photovoltaic generators ensures lower operational costs and therefore, is considered as an important issue. An approach for sizing along with a best management technique for a PV-wind hybrid system with batteries is proposed in this paper, in which the best size for every component of the system could be optimized according to the weather conditions and the load profile. The average hourly values for wind speed and solar radiation for Izmir, Turkey has been used in the design of the systems, along with expected load profile. A hybrid power model is also developed for battery operation according to the power balance between generators and loads used in the software, to anticipate performances for the different systems according to the different weather conditions. The output of the program will display the performance of the system during the year, the total cost of the system, and the best size for the PV-generator, wind generator, and battery capacity. Using prop...
This paper presents the development of a line follower wheeled mobile robot. In this project, LM3S811 which is ARM cortex-3 based microcontroller is chosen as the main controller to react towards the data received from infra-red line... more
This paper presents the development of a line follower wheeled mobile robot. In this project, LM3S811 which is ARM cortex-3 based microcontroller is chosen as the main controller to react towards the data received from infra-red line sensors to give fast, smooth, accurate and safe movement in partially structured environment. A dynamic PID control algorithm has been proposed to improve the navigation reliability of the wheeled mobile robot which uses differential drive locomotion system. The experimental results show that the dynamic PID algorithm can be performed under the system real-time requirements.