en موتور احتراق داخلی Internal Combustion Engines (ICE, ...) پژوهشي Research This paper presents a reduce roll vibration of the full vehicle model with passive suspension systems using vibration absorber to change the dynamic system matrix stat’s eigenvalue. Since using the controller system has been splurged and required to energy consuming, in this research the vehicle body roll vibration has been reduced and supplied vehicle stability using a vibration absorber for the passive suspension system. In this paper a new manner is introduced to reduce body roll angle and body's roll acceleration. The transverse instability in the independent suspension is a main problem, roll angle decreased transverse stability, that it has been reduced using vibration absorber. The optimal value of vibration absorber’s mass, spring and damping coefficient has been determined by using genetic algorithms (GA) to achieve developed roll angle behavior. The main purpose of this article is to reduce vehicle body roll angle that has been acquired using vibration absorber, this manner is better than other ways for roll reduction of vehicle body because it has done without any energy consuming. Full vehicle model, Vibration absorber, Genetic algorithm, Passive suspension 592 601 http://ase.iust.ac.ir/browse.php?a_code=A-10-63-58&slc_lang=en&sid=1 Hemati 180031947532846001032 180031947532846001032 Yes Tajdari 180031947532846001033 180031947532846001033 No Khoogar 180031947532846001034 180031947532846001034 No