الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The vehicle suspension system is masterminded between vehicle body and wheels of the vehicle; this part disconnects the vehicle body from the lower some segment of vehicle. Giving comfort is the important part of the suspension structure yet moreover offering soundness to vehicle, road holding with and security to vehicle parts are in like manner diverse components of suspension systems which should be master by suspension system with giving comfort. In this present work, an MR-damper is fitted to a non-linear quarter car model in order to obtain the optimum voltage required to operate the MR-damper during the vehicle passing over a bumps. The quarter car modeled as three degree of freedom system with nonlinear quadratic tire stiffness. Macpherson strut suspension system is implemented for the study. The optimum voltage is obtained depending on ride comfort which is the vertical passenger acceleration and tire displacement which represents the road holding. The analysis is done using a genetic algorithm (GA) in MATLAB/SIMULINK software. GA is implemented to minimize both the vertical passenger acceleration and tire displacement of the sprung mass with constraints. The results are compared to the passive suspension system for validation. The passenger acceleration is reduced by 76.45 % with respect to the maximum value obtained from Pareto front at speed 70 km/hr while the displacement is reduced by 67.97 % with respect to the maximum value obtained from Pareto front at speed 70 km/hr. A Pareto front is obtained at different vehicle velocities and various bumps to demonstrate the effect of vehicle velocity on passenger vertical acceleration and tire displacement and gives more flexibility to choose optimum solution as the designer requirements. Finally the voltage history among the simulation time is obtained at every point of Pareto front solutions and an artificial neural network is designed using three different methods to predict the voltage of MR damper for any road input.