iosr-JMCE   Volume-13 ~ Issue-4 ~ July-Aug 2016

Abstract: Suspension system plays an important role in ride comfort and road holding. In this paper, the two degree-of-freedom quarter car model with passive and semi-active suspension system is designed using Matlab/Simulink. The semi-active suspension system is designed with MR damper. The control performance is compared between passive and semi-active suspension system. The results showsthe vehicle response results obtained from step and sine of road input simulations. In conclusion we concluded that semi active system gives 93.9% and 63.7% better result for step and Half sine input respectively.

Keywords: Bingham model, Passive, Quarter car, Semi-active, Simulink,.

[1]. Hassan Ahmed Metered, "Modeling And Control Of Magneto-rheological Dampers For Vehicle Suspension Systems" A thesis
submitted to the University of Manchester for the degree of Doctor of Philosophy in the Faculty of Engineering and Physical
Sciences, 2010.
[2]. Ahmad ZaimSolehin Bin CheHasan, "Modelling And Simulation Of Modified Skyhook Control For Semi-Active Suspension"
Bachelor Of Engineering, University Malaysia Pahang, 2010.
[3]. H. F.Lam, C. Y.Lai, W. H.Liao," Automobile suspension system with MR Fluid Dampers" The Chinese University of Hong Kong.
[4]. Lord Corporation, "Frequently Asked Questions," Lord Corporation, April, 2003. http://www.mrfluid.com/faqs.htm
[5]. R NYerrawar, Dr.R.RArakerimath, SagarRajendraPatil, PrashantSambhajiWalunj,"Performance Comparison of Semi-Active
Suspension and Active Suspension System Using MATLAB/ Simulink"..

Abstract: User satisfaction is the main factor in assessing the quality of service, where the consumers evaluate performance that directly received and perceived towards the product of a service (Cronin, et al,1992). The quality of service is determined by the level of compatibility between the service given and wished by users (TRB, 1999). The higher the quality of service perceived, there will be higher the level of users satisfaction, further the more positive intention behavior in addressing the service. The model which is used in determining the public transportation desired by society is :...........

Keywords: The quality of service, Model, Public massive transportation that is desired by society.

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Abstract: The wind tower is an ancient technique used since the time of Feraoun (1300 AC) until today for natural ventilation in the arid Middle East region including Iraq and Iran without any energy consumption ensuring thermal comfort and considerable energy efficiency by comparing it with HVAC systems (Heating, Ventilation and Air-Conditioning) widely used in these areas. Two mechanisms are used in the natural ventilation: buoyancy caused by the temperature difference and the wind pressure forces on the envelope of the ventilated structure...........

Keywords: Natural ventilation, wind tower, fluid-structure interaction, aerodynamic shape, CFD.

[1] B.MOUJALLED. 2007. Dynamic modeling of thermal comfort in naturally ventilated buildings. Doctorat thesis. The Institute of Applied Sciences in Lyon.France.
[2] Agency of Promotion and Rationalization of the Use of Energy APRUE.[Online] http://www.aprue.org.dz/
[3] J. K. Calautit, B. R. Hughes, S.S. Shahzad, 2015; CFD and wind tunnel study of the performance of a uni-directional wind catcher with heat transfer devices, Renewable Energy 83 85-99.
[4] Wang Liping, Wong Nyuk Hien, Applying Natural Ventilation for Thermal Comfort in Residential Buildings in Singapore, Department of Building, National University of Singapore, 4 Architecture Drive, Singapore 117566, Architectural Science Review Volume 50.3, pp 224-233.
[5] David Etheridge, 2011; Natural ventilation of buildings; Natural Ventilation of Buildings: Theory, Measurement and Design. Department of architecture and built environment, University of Nottingham, UK, Edition Wiley.

Abstract: In India, it is mandatory to test a safety belt for its durability according to prescribed standard before it is tested under dynamic conditions. This is done with regard to passenger safety in the event of an accident. The durability of the belt is evaluated for about 45,000 cycles under prescribed load. Present day demand for testing of belts has increased tremendously due to the growth of the Indian automotive sector. To cope-up with this ever-increasing demand, a need has arisen to design a new machine altogether which would be capable of testing seat belts and which would operate on the latest principle of servo-motor technology.. .............

Keywords:Retractor, Durability, Prototype, State Of Art, Machine Design

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[2]. Machine Design Data Book by V.B.Bhandari
[3]. Stepper Motors : Fundamentals, Applications And Design by V.V.Athani
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[5]. Wikipedia