Study the dynamic behaviour of seven DOF of full car model with semi-active suspension system
by Hemanth Krishna; Shamanth Vasanth; Devaraj Sonnappa; Hemanta Kumar; Kalluvalappil Gangadharan
International Journal of Vehicle Performance (IJVP), Vol. 7, No. 1/2, 2021

Abstract: This paper presents an investigation on the ride comfort and road-holding performance of a vehicle equipped with the semi-active suspension system. The full car semi-active suspension model with 7 degrees of freedom (7 DOF) system is adopted for the study and a fuzzy-logic control strategy is considered for minimising the effect of road disturbance on vehicle performance. The responses of a vehicle have been analysed under the Indian average random road profile (ISO8608) against the conventional passive suspension system. The performance of the semi-active suspension system is evaluated by heave, roll and pitch acceleration of the vehicle body around its centre of gravity. The performance of a vehicle with the semi-active suspension system has been compared with the response conventional passive suspension system. The result specifies that, the semi-active suspension system with a fuzzy-logic controller reduces around 43% of vibration amplitude at the resonance frequency of vehicle than the passive suspension system.

Online publication date: Thu, 04-Mar-2021

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