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Proceedings of

4th International Conference on Advances in Mechanical and Robotics Engineering AMRE 2016

Date
16-Dec-2016
Location
Rome , Italy
Authors
16
ISBN
978-1-63248-115-3

6 Articles Published

1. HYSTERESIS NONLINEARITIES IN PNEUMATIC ARTIFICIAL MUSCLES

Authors: MALAK AL-MA'AITA , MOHAMMAD AL JANAIDEH , MOUDAR ZGOUL

Abstract: Pneumatic artificial Muscles (PAMs) are, nowadays, widely used in factory floor automation as well as in robotics. One of the major appeals about PAMS is the high force to weight ratio as well as their light weight, structural flexibility. Furthermore, PAMS do not exhibit any mechanical wear they are relatively low in cost. However PAMs are known to exhibit hysteresis nonlinearities between the input pressure and the output force as well as the contraction ratio and the input pressure. Such nonlinearities are known to cause oscillations in the open-loop system’s responses, as well as poor tracking performance and potential instabilities. This work reviews the some of the available models used to simulate the hysteresis nonlinearities in PAMs which will facilitate to study the effects of these nonlinearities in order to characterize and to enable the design of controllers for compensating for the hysteresis effects

Keywords: PAMs, robotics, modelling, hysteresis, nonlinearities

Pages: 6 - 10 | DOI: 10.15224/978-1-63248-115-3-356

2. AN EXPERIMENTAL STRUCTURE AND PROCEDURE TO OBSERVE HEAT BEHAVIOR OF PV MODULES

Authors: ERSOY KELEBEKLER

Abstract: It is well known that open circuit voltage and output voltage decreases significantly while operating temperature of PV cell/module increases. This means reduction of conversion efficiency of cell/module. On the other hand, short circuit current increases slightingly with rise of temperature. In the study, an experimental structure and procedure has been constructed and performed in order to show behavior of PV cell/module depending on rise of temperature. The proposed experimental procedure is applicable for almost all renewable/alternative energy technology laboratories. Experimental results obtained from the structure for two different illumination values are given on figures and shown how open circuit voltage and short circuit current changes at these illumination values.

Keywords: PV module/cell, heat behavior,

Pages: 1 - 5 | DOI: 10.15224/978-1-63248-115-3-34

3. SOME ASPECTS AS REGARDS FLUID FLOW AND TURBULENCE MODELLING IN IC ENGINES

Authors: D. NIKOLIC , M.TOMIC , ZORANMASONICIC

Abstract: In this paper some initial results concerning the evolution of flame propagation in 4-valve engines with tilted valves were presented. Results were obtained by dint of multidimensional modeling of reactive flows in arbitrary geometry with moving boundaries. The effect of turbulence model variation on flame propagation was tackled as well. Namely, some results obtained with eddy-viscosity model i.e. standard k-ε model were compared with results obtained with k-ξ-f model of turbulence in domain of 4-valve engine in-cylinder flow. Some interesting results emerged rendering impetus for further quest in the near future. In the case of combustion all differences ensuing from turbulence model variation, encountered in the case of non-reactive flow were annihilated entirely. Namely the interplay between fluid flow pattern and flame propagation is invariant as regards both turbulence models applied.

Keywords: Computational Fluid Dynamics (CFD), Automotive Flows, Turbulence Modelling

Pages: 11 - 14 | DOI: 10.15224/978-1-63248-115-3-36

4. EFFECT OF HEAT TRANSFER ENHANCEMENT: IN INNER TUBE WITH APPARATUS

Authors: AFSIN GUNGOR , CANAN GUNGOR , ISMET FARUK YAKA

Abstract: In recent century due to technological advances and population have increased energy demand. Energy save and energy use efficiency has become important topic. Energy production, transmission process is related to heat transfer. When the heat transfer is enhancing at energy process, energy efficiency will increase. The heat transfer enhancement techniques are widely used in many applications in the heating process. These techniques are classified as active and passive techniques. The objective of this study is to increase heat transfer efficiencies in tube with passive techniques. For this purpose, various apparatus will place into inner tubes which increase the heat transfer surfaces. The experiments were performed with 3 different type apparatus. It was compare and analyzed efficiency of apparatus types.

Keywords: Heat Transfer, Heat Exchanger, Energy Efficiency

Pages: 15 - 18 | DOI: 10.15224/978-1-63248-115-3-52

5. EXPERIMENTAL PERFORMANCE ANALYSIS OF AN AUTOMOTIVE AIR CONDITIONING AND HEAT PUMP SYSTEM USING R134A WITH AND WITHOUT INTERNAL HEAT EXCHANGER

Authors: ERKUTAY TASDEMIRCI , ERTAN ALPTEKIN , MURAT HOSOZ

Abstract: In this study an experimental system was set up from the original components of an automotive air conditioning (AAC) system. After than internal heat exchanger (IHX) and reversing valve were installed to use as heat pump and improve performance of it. For each mode of operations, the system was tested at five different compressor speeds between 800 and 2800 rpm with intervals of 400 rpm. In the heat pump mode operations without IHX, the temperatures of the air streams entering the evaporator and condenser were maintained at Tevap,ai=0°C – Tcond,ai=0°C, Tevap,ai=10°C –Tcond,ai=10°C and Tevap,ai=15°C – Tcond,ai=15°C. IHX was started up the temperatures of the air streams at the inlets of the evaporator and condenser were maintained at Tevap,ai=5°C – Tcond,ai=5°C, Tevap,ai=10°C –Tcond,ai=10°C and Tevap,ai=15°C – Tcond,ai=15°C. Using experimental data, performance parameters such as conditioned air stream temperature, compressor power, compressor mechanical power and compressor discharge t

Keywords: HFC134a, automotive air conditioning, internal heat exchanger

Pages: 19 - 24 | DOI: 10.15224/978-1-63248-115-3-57

6. APPLICATION OF ROBOTS LEGO MINDSTORMS EDUCATION EV3 IN THE LEARNING PROCESS OF SPECIALTY MECHATRONICS

Authors: KARTUNOV S. , RACHEV P , STOYCHEV M.

Abstract: This article contains information about the course "Robotic modules and systems in production" for specialty Mechatronics in TU of Gabrovo, Bulgaria. Below are examples of robots that students develop exercises. Apply didactic approach that is very modern in training not only for students. With Lego Mindstorms easily can be developed a small model of industrial robot or a some system that is used in real life.

Keywords: Lego, Mindstorms, specialty

Pages: 25 - 27 | DOI: 10.15224/978-1-63248-115-3-71

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