Semi Active Vibration Control of a Passenger Car Using Magnetorheological Shock Absorber

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Fellah Jahromi, Ali | 2010

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Type of Document: M.Sc. Thesis
Language: English
Document No: 40458 (58)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Zabihollah, Abolghasem
Abstract:
This project is intended to introduce a semi-active control for suspension systems of passenger cars wherein, in addition to usual dampers, the damper using Magnetorheological (MR) fluid instead of ordinary oil is used. In order to model the suspension system, a mass-spring model with eight degree-of-freedoms without considering the effect of car velocity is developed. A semi-active vibration control is presented to reduce the amplitude of automotive vibration caused by the alteration of road profile. In order to design a suitable control mechanism, first, an optimal control algorithm, Linear Quadratic Regulator (LQR) and Linear Quadratic Gaussian (LQG), are used to control the system; secondly, the fuzzy logic algorithm is employed to control the amplitude of vibration in a certain range. It is observed that utilizing the present control algorithm may significantly reduce the vibration response of the passenger car, thus, providing comfortable drive
Keywords:
Suspension System ; Fuzzy Control ; Semiactive Control ; Magnetorheological Damper ; Full Car ; Linear Gussian Estimator

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