Yogesh Sanjay Pathare* et al. ISSN: 2250-3676 [IJESAT] [International Journal of Engineering Science & Advanced Technology] Volume-3, Issue-3, 157-170 IJESAT | Mar-Apr 2014 `` 157 Available online @ http://www.ijesat.org Design And Development Of Quarter Car Suspension Test Rig Model And It’s Simulation Yogesh Sanjay Pathare (Author1) Student Master Of Engineering(Design) University Of Pune Pravara Rural Engineering College Loni,Ahmednagar Maharashtra, India yogeshpathare2050@gmail.com Sripad R Nimbalkar(Author2) Associate Professor Dept Of Mechanical Engineering Pravara Rural Engineering College Loni,Ahmednagar Maharashtra, India srnimbalkar@yahoo.co.in Abstract For this modern fast pace world transportation being the backbone of society, the fact of luxury and comfort has also become of utmost interest for many people. The competition in automobile industries put the standards on higher level concerned about vehicle suspension as it is directly related to human health andcomfort.As the vehicle suspension is concerned, it varies from one vehicle to another and from one application to another. These various suspension systems are designed accordingly with the desired effects and performances. The testing and calibrating facilities for these suspension systems are available at their manufacturers and some purposefully established organizations only. This project is hence carried so as to develop a simplified and cost effective suspension system testing setup. The setup is made as a quarter car setup, the reduced model from a full car, to reduce the cost of deve lopment and the complications in its design and manufacturing. The work involved was from selection of suspension system to final readings and analyses. The M cPherson strut independent suspension system was selected, as nowadays it is being most popular suspension system in passenger cars. The procedure for development was analytical as well as experimental. Hence the initial mathematical model was developed and the analytical results were taken on MatLab 10, as an analytical solver. In later stages the experimental setup is developed and the actual readings were taken for various inputs; finally both experimental and analytical results are compared for reliability of experimental setup. Keywords: Suspension, Mcpherson Strut, Matlab, Simulation etc. --------------------------------------------------------------------- *** ---------------------------------------------------------- ------------- INTRODUCTION The main functions of an automotive suspension system are to provide vehicle support, stability and directional control during handling maneuvers and to provide effective isolation from road disturbance. These different tasks result in conflicting design requirements. Directional control and stability requires a suspension that is neither very stiff nor very soft. Insensitivity to external loads requires a stiff suspension, whereas good ride comfort demands a soft suspension. In a conventional passive susp ension system, the designer is faced with the problem of choosing the suspension stiffness and damping parameters, which inevitably involves a difficult compromise in view of the wide range of conditions over which a vehicle operates. Ride and handling performances of a vehicle suspension system often present engineers conflicting design goals. For decades, engineers have studied active control for vehicle suspension systems to resolve this conflict. The intent of the system is to replace the classical passive elements by a controlled system that can supply unlimited force to the system. This type of active suspension system has proven capable of achieving improvement over passive systems The different methods of measurement of vibrations in cars is studying the dynamics of motions, preparing the state space equations, conversion of acceleration inputs in velocity and displacement and analyze the frequency response in graphical form and also simulating the system using the matlab software. Measurement of tire dynamics, degrees of freedom of the suspension components such as M cpherson strut, control rods, lower arm, upright, car body frame.