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Öğe Design and manufacture of automated controlled test machine detecting braking characteristic of brake lining in vehicles(Sage Publications Ltd, 2017) Timur, Mustafa; Kuscu, Hilmi; Toylan, HayrettinThis study has been carried out in order to measure friction coefficient of friction materials used in autos through computer program. Variants such as speed, temperature, and pressure have been discussed and the effect of these variants on friction materials of autos. Variants such as speed, temperature, and pressure resulting from various effects in autos have been discussed, the effects of these variants on friction materials have been examined and their friction coefficients have been detected. In the test device whose manufacturing has been completed, temperature value between surface of brake lining and disc used during tests a machinery has been prepared in a way that temperature values are 0-400?, speed values are 0-1400 rev/min, pressure values are 0-1.05Mpa. In consideration of these dates, it has become possible to constitute friction coefficient-temperature, friction-time and temperature-time diagrams. By benefiting from the tests to be performed through friction coefficient test device, enhancement or progress will be ensured in material selection, technology and theory. Control pf parameters such as speed, temperature, pressure, force, and friction coefficient to be measured are performed easily through test device; moreover, thanks to electronically sensitivity of electronically and mechanical materials used in test device, it is ensured that you can reach the values you want to reach correctly. Friction tests have been carried out on samples having different properties in auto regulative test device. Friction coefficient values of automotive brake linings in the new system design and manufacturing which is carried out, have been in conformity with SAE-J661 Standard and TSE 555-9076 Standard (Turkish Standards Institution). Test results obtained are in parallel with the literature.Öğe The effect of flow rate on small solar chimney performance(Taylor & Francis Inc, 2020) Kuscu, Hilmi; Eryener, DoganThe relationships between temperature rise, flow rate, and power output of turbine are presented for a small solar chimney unit. An experimental solar chimney system was constructed at Engineering Faculty of Trakya University in Turkey. Solar radiation, temperature rise, chimney inlet velocity, air flow rate, and power output were monitored. Solar chimney power output can be controlled by air flow management and maximum power point can be achieved for different operating conditions. Results showed that it is possible to obtain up to 50% more power output by using an air flow controller in solar chimney systems. Typical temperature rises for 400-600 W/m(2)solar radiation is found to be in the range of 12-15 degrees C. Power is changed in the range of 30-60 W according to different flow rates.Öğe Evaluation of temperature and properties at interface of AISI 1040 steels joined by friction welding(Emerald Group Publishing Ltd, 2008) Kuscu, Hilmi; Becenen, Ismail; Sahin, MuminPurpose - The purpose of this paper is to evaluate temperature and properties at interface of AISI 1040 steels joined by friction welding. Design/methodology/approach - In this study, AISI 1040 medium carbon steel was used in the experiments. Firstly, optimum parameters of the friction welding were obtained by using a statistical analysis. Later, the microstructures of the heat-affected zone are presented along with micro hardness profiles for the joints. Then, the temperature distributions are experimentally obtained in the interface of the joints that is formed during the friction welding of 1040 steels with the same geometry. This study was carried out by using thermocouples at different locations of the joint-interface. The results obtained were compared with previous studies and some comments were made about them. Findings - It was discovered that temperature had a substantial effect on the mechanical and metallurgical properties of the material. Research limitations/implications - The maximum temperature in the joint during frictional heating depends not only on the pressure, but also on the temperature gradient which depends on the rotational speed in particular. It is important to note that the measurement process was successfully accomplished in this study although it was particularly difficult to obtain temperature due to the large deformations at the interface. Future work could be concentrated on the temperature measurement of the joined materials. Practical implications - Temperature is one of the most important of all physical quantities in industry. Its measurement plays a key part in industrial quality and process control, in the efficient use of energy and other resources, in condition monitoring and in health and safety. This paper contributes to the literature about temperature measurement in welded, brazed and soldered materials. Originality/value - The main value of this paper is to contribute and fulfill the influence of the interface temperature on properties in welding of various materials that is being studied so far in the literature.Öğe Hybrid transpired solar collector updraft tower(Pergamon-Elsevier Science Ltd, 2018) Eryener, Dogan; Kuscu, HilmiA novel hybrid solar updraft tower prototype, which consists of photovoltaic panels and transpired solar collector, is studied, its function principle is described and its experimental performance is presented for the first time. A test unit of transpired solar collector updraft tower was installed at the campus of Trakya University Engineering Faculty in Edirne-Turkey in 2015. PV modules cover 42% of transpired solar collector area. PV and turbine power output, solar radiation, ambient temperature, temperature rise, collector cavity temperatures, and chimney velocities were monitored during 18 months. The results showed that hybrid solar updraft tower efficiency increased by about 2% in average compared to stand-alone PV system. The temperature rise in hybrid solar updraft tower is found to be 12-14 degrees C on the typical sunny day. Energy was produced continuously for 24 h. The results showed that solar utilization ranges from 60% to 80% during daytime.Öğe Obtaining the gait pattern joint angles of the bipedal walking robot by physical and mathematical methods(Gazi Univ, Fac Engineering Architecture, 2023) Tez, Taskin; Kuscu, HilmiIn this study, physical, mathematical, and geometric methods were used to produce the static walking patterns of the bipedal robot. For the static walking of the bipedal robot, a flat surface was used and zero moment point criteria were adhered to. The walking patterns produced were applied to the 12-jointed bipedal robot, and it was carried out to walk on a flat surface. Figure A. Gait pattern of the right leg for a gait cycle and the biped robot gait pattern.Purpose: The aim of this study is to obtain the static walking patterns of the bipedal robot, similar to a human gait, by physical, mathematical, and geometric methods and to realize the static walking of the bipedal robot.Theory and Methods: In this study, firstly; Physics, mathematics, geometry, trigonometry, forward, and inverse kinematics methods were used to obtain the values of the joint angles required for the walking pattern of the bipedal robot. Then, the balance control of the bipedal robot was obtained according to the zero moment point method. Thus, the patterns of the joint angles required for the static walking of the bipedal robot were found. However, the gait patterns produced are only used for static walking. Therefore, the bipedal robot has to only walk on a flat surface, as shown in Figure A.Results: In this study, no physical intervention was made on the bipedal robot and static walking of the bipedal robot without falling on a flat surface was performed.Conclusion: When the theoretically calculated angle values are applied to the bipedal robot, it has been determined that the angles of the servo motors in the joints of the bipedal robot move to the desired position. However, since the walking pattern is made with the static walking algorithm, the bipedal robot cannot increase its speed whenever it wants like a human. Therefore, the speed and stride length of the bipedal robot has been limited due to static walking.Öğe Optimized Graph Search Algorithms for Exploration with Mobile Robot(Politeknik Elektronika Negeri Surabaya, 2021) Gullu, Aydin; Kuscu, HilmiGraph search algorithms and shortest path algorithms, designed to allow real mobile robots to search unknown environments, are typically run in a hybrid manner, which results in the fast exploration of an entire environment using the shortest path. In this study, a mobile robot explored an unknown environment using separate depth-first search (DFS) and breadth-first search (BFS) algorithms. Afterward, developed DFS + Dijkstra and BFS + Dijkstra algorithms were run for the same environment. It was observed that the newly developed hybrid algorithm performed the identification using less distance. In experimental studies with real robots, progression with DFS for the first-time discovery of an unknown environment is very efficient for detecting boundaries. After finding the last point with DFS, the shortest route was found with Dijkstra for the robot to reach the previous node. In defining a robot that works in a real environment using DFS algorithm for movement in unknown environments and Dijkstra algorithm in returning, time and path are shortened. The same situation was tested with BFS and the results were examined. However, DFS + Dijkstra was found to be the best algorithm in field scanning with real robots. With the hybrid algorithm developed, it is possible to scan the area with real autonomous robots in a shorter time. In this study, field scanning was optimized using hybrid algorithms known.Öğe A Real-Time Apple Grading System Using Multicolor Space(Hindawi Ltd, 2014) Toylan, Hayrettin; Kuscu, HilmiThis study was focused on the multicolor space which provides a better specification of the color and size of the apple in an image. In the study, a real-time machine vision system classifying apples into four categories with respect to color and size was designed. In the analysis, different color spaces were used. As a result, 97% identification success for the red fields of the apple was obtained depending on the values of the parameter a of CIE L* a* b* color space. Similarly, 94% identification success for the yellow fields was obtained depending on the values of the parameter y of CIE XYZ color space. With the designed system, three kinds of apples (Golden, Starking, and Jonagold) were investigated by classifying them into four groups with respect to two parameters, color and size. Finally, 99% success rate was achieved in the analyses conducted for 595 apples.Öğe Remote access for education and control of mechatronics systems(Elsevier Science Bv, 2015) Gullu, Aydin; Aki, Ozan; Kuscu, HilmiApplied training is important in mechatronics engineering, a multidisciplinary science. Laboratory practice should be done theoretical training to be efficient. Expert trainers are required for mechatronics education which is a complex science. In this study, a network infrastructure is made for education and control of modular production system which is a mechatronics system. The structure was applied to mechatronics laboratory where is Trakya University Ipsala Vocational School. In this way, an educator will provide the education of trainees, from any location with internet. Also, a modular production system can be controlled remotely. (C) 2015 The Authors. Published by Elsevier Ltd.Öğe A research on SCADA application by the help of OPC server for the water tank filling system(Academic Journals, 2010) Toylan, Hayrettin; Kuscu, HilmiThis study deals with the data exchange issues based on object linking and embedding for process control (OPC) server in industrial automation systems. OPC server is a software developed to solve the driver device problem, where the first-tier visualization and supervisory control and data acquisition (scada) applications needed to have a standard way for reading and writing data from devices on the factory floor in process control. In this paper, the aim of the study was to control the water tank filling system through the programmable logic controller (PLC) and to observe the procedure by the help of SCADA The connection between the PLC and SCADA is maintained by the OPC server. With OPC server, the exchange of digital and analogue data obtained from sensors in the system can be realized with low cost and maximum performance. This paper illustrates the use of OPC server in industrial automation systems and the necessary PLC algorithms. A practical application of the design of the system is described.Öğe Temperature Determination of St-Al Joints During Friction Welding(Trans Tech Publications Ltd, 2012) Misirli, Cenk; Sahin, Mumin; Kuscu, HilmiThe joining of dissimilar materials is of great importance in industry. Especially, if it is used as the lightest part of the machine parts, materials such as aluminum and magnesium can be joined with steels. Friction welding is one of the methods getting higher share among the other welding methods. In the process, heat is generated by conversion of mechanical energy into thermal energy at the interface of the work pieces during rotation under pressure. Some of the advantages of friction welding are high material save, low production time and being possible of welding of parts which are made by different metals or alloys. Friction welding can also be used in order to join the components that have circular or non circular cross sections. In this study, stainless-steel and aluminum materials which is the example material was used in the friction welding experiments. The temperature distributions are experimentally obtained in the interface of joints that is formed during friction welding of joints having same geometry. This study was made using thermocouples at different locations of joint-interface.Öğe Thermal performance of a transpired solar collector updraft tower(Pergamon-Elsevier Science Ltd, 2017) Eryener, Dogan; Hollick, John; Kuscu, HilmiA novel solar updraft tower prototype, which consists of transpired solar collector, is studied, its function principle is described and its experimental thermal performance is presented for the first time. A test unit of transpired solar collector updraft tower was installed at the campus of Trakya University Engineering Faculty in Edirne-Turkey in 2014. Solar radiation, ambient temperature, collector cavity temperatures, and chimney velocities were monitored during summer and winter period. The results showed that transpired solar collector efficiency ranges from 60% to 80%. The maximum temperature rise in the collector area is found to be 16-18 degrees C on the typical sunny day. Compared to conventional solar tower glazed collectors, three times higher efficiency is obtained. With increased thermal efficiency, large solar collector areas for solar towers can be reduced in half or less. (C) 2017 Elsevier Ltd. All rights reserved.
