IJET Vol. 1, Issue 1, March 2015

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https://hdl.handle.net/11363/475

International Journal of Engineering Technologies (IJET) Dergisi / International Journal of Engineering Technologies (IJET)

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International Journal of Engineering Technologies (IJET) Vol. 1, Issue 1, March 2015
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015) Çolak, İlhami
Dear Colleagues, On behalf of the editorial board of International Journal of Engineering Technologies (IJET), I would like to share our happiness to publish the first issue of IJET. My special thanks are for members of editorial board, editorial team, referees, authors and other technical staff. Please find the first issue of International Journal of Engineering Technologies at http://dergipark.ulakbim.gov.tr/ijet. We invite you to review the Table of Contents by visiting our web site and review articles and items of interest. IJET will continue to publish high level scientific research papers in the field of Engineering Technologies as an International peerreviewed scientific and academic journal of Istanbul Gelisim University. Thanks for your continuing interest in our work, Professor ILHAMI COLAK Istanbul Gelisim University icolak@gelisim.edu.tr http://dergipark.ulakbim.gov.tr/ijet Print ISSN: 2149-0104
A Comparative Study of on and off Grid Tied Integrated Diesel Solar PV Generation System
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-02-08) Okedu, Kenneth; Uhunmwangho, Roland; Bassey, Ngang
This paper presents a proposed hybrid system based on diesel generator and solar photovoltaic (PV) as an effective option to power a small remote community. The cost of running diesel generator speedily due to erratic power supply in a small remote community that is not grid connected is highly expensive and not environmentally friendly. A solar PV was used to reduce or augment the continuous diesel generator sets, resulting in reduced cost of operation and maintenance. A proper solar radiation data and sizing based on the specification of the PV system and battery bank was done. In addition, a comparative study was carried out considering two scenarios of the proposed model system. In the first scenario, the diesel generation, solar PV system was treated as autonomous (or standalone). In the second scenario, the proposed model system was connected to the grid system. It is discovered that powering the small remote community with the proposed hybrid system is much more beneficial and encourages competition with other conventional energy sources, because it minimizes both operating costs and pollutants emissions. Furthermore, analysis results obtain from HOMER software shows that is promising to implement the on-grid system.
Position Singularities and Ambiguities of the KUKA KR5 Robot
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-01-26) Husi, Géza
Recently in the Robot technological laboratory of the Department of Electrical Engineering and Mechatronics (EEM) of the Faculty of Engineering, University of Debrecen there have been several researches concerning the KUKA and SONY Scara robots. Various diploma works have already been made in the laboratory and students have informed me that the running of their program was interrupted because of an unknown error. The error could be unanimously led back to the ambiguity of robots. Meanwhile, industrial partners also contacted the laboratory asking for advice to solve similar problems. To solve the aforementioned problem of this two-way inquiry I began to be engaged in the problems of singularities and ambiguities. The first part of the paper is a theoretical summary deducing the notions concerning robots from the general system technique. I tried to draft all the definitions as precisely as possible to be able rely on them, only to find out the complexity of the required mathematical apparatus necessary for getting to know the nature of this problem, albeit knowing the mathematics of the Denavit–Hartenberg transformation and the use of the Jacobi-matrix. This paper summarizes the singularity of robot positions and their uncertainty by analyzing the KR5 industrial robot in the Robot Technological Laboratory in the EEM. This paper regards the definition of the ISO 8373:2012 standard as a base and deduces all ideas and relations from this standard. ISO 8373 was prepared by the Technical Committee ISO/TC 184, Automation Systems and Integration, Subcommittee SC 2, Robots and Robotic Devices.
Multiobjective Pareto Optimal Design of a Clutch System
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-02-08) Ozansoy, Onur; Tevruz, Talat; Mugan, Ata
Optimum design of a clutch and dual mass flywheel system is completed. Although the clutch systems are exposed to both rotational and axial vibrations, they are generally designed by considering rotational vibrations of engines and they do not have any component to damp axial vibrations due to the following two reasons: first, the package area of the clutch system is very limited and there is no available space to put additional springs and dampers to reduce these vibrations. Second, axial vibrations are normally insignificant to be considered in the analyses and such vibrations are supposed to be damped by the diaphragm spring and cushion springs. Nonetheless, axial vibrations may lead to some unexpected problems in the power train such as the rattle noise that is examined in this study by using global optimization techniques. The components in the clutch system are modeled analytically. Then, by considering the pedal characteristics and vibrations of pressure plate as objective functions, a multi-objective Pareto optimization problem is solved. It is shown that analytical models agree well with the experimental measurements and vibrations in the clutch system can be reduced significantly by choosing the design parameters with optimization tools.
CAE Model Correlation & Design Optimization of a Laminated Steel Oil Pan by means of Acceleration and Strain Measurement on a Fired Engine
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-01-16) Yanarocak, Rıfat; Çekiç, Abdülkadir
In this paper, a simultaneous design and development work for a diesel engine oil pan is presented. The interesting point making the design of the oil pan so special is its laminated steel material. Beside its material, due to the deep-drawing production method, to determine the natural frequencies of the structure with CAE methodology is a problem for the design engineer. Especially when the highly nonlinear character of the oil pan and regions at different thicknesses sum up with the hardness of liquid modelling, free vibration modal analysis of the design at virtual environment becomes extremely challenging. Therefore, instead of refining the material characteristics in virtual design, first a primary 3D dummy design is generated. Afterwards, a production method and material intent sample is produced with soft tool. Hammer test is applied on this sample filled with oil, therefore modal shapes and frequencies are gained. As a result, CAE modal analysis is generated and correlated by hammer test results; hence the first challenge of modelling the liquid is overcome. Then, critical stress locations are determined with the CAE durability analysis. After instrumenting the pan with optimum number of accelerometers and strain-gages from these critical locations, a durability test on a fired engine is run. With the measurements here, the CAE durability analysis is refined so the second challenge of material nonlinearity and thinning due to the deep-drawing method is also overcome. Lastly, with the CAE durability simulation, a secondary 3D design proposal is established. Normally the method reach to success here, but to validate it, a secondary sample is produced, instrumented again with accelerometers & gages and tested resulting in significant improvement in terms of durability. With this approach, a method to perform a fail-safe oil pan design in single loop is verified.
Comparison of Microwave and Conventional Driven Adsorption Heat Pump Cycle Duration
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-01-23) Demir, Hasan
The present experimental study includes comparison of microwave regenerated and conventional heated adsorbent bed of adsorption heat pump. The novel adsorption heat pump driving with microwave heating system was designed and manufactured. Microwave oven was constructed for providing homogeneous temperature distribution in the adsorbent bed. Temperature and pressure variations in the adsorption heat pump for both microwave and conventional regenerated cycles were measured and investigated. Duration of isobaric desorption process with microwave heating was achieved 98.2% shorter than that of conventional heating system.
A Paradigm Change in Road Safety Evaluation: From Hypothetico-Deductive Testing to Designing Safety Systems
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-01-23) Kazıkçı, Akın Osman; Paget, Nicolas; Fricheteau, Romain
Automobile industry is going through important changes with the rise of connected vehicle paradigm. In this context, traditional performance evaluation procedures are becoming obsolete or insufficient. This is particularly the case for road safety evaluation models since new information and communication technologies engender new types of vulnerabilities. This paper claims that traditional hypothetico-deductive evaluation paradigms are no longer adequate to assess road safety. To complement this traditional approach, we present an alternative perspective based on design theory originating from engineering design field. We illustrate the use of design methods in this context. More generally, we argue that a design based approach to road safety evaluation will allow integrating evaluators early in the process, and to give them a set of new tools coming from design theory in order to design better experiments with indicators of safety are better adapted to changing safety situations.

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