Title: Study the dynamic behaviour of seven DOF of full car model with semi-active suspension system

Authors: Hemanth Krishna; Shamanth Vasanth; Devaraj Sonnappa; Hemanta Kumar; Kalluvalappil Gangadharan

Addresses: School of Mechanical Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bengaluru, Karnataka, 560064, India ' School of Mechanical Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bengaluru, Karnataka, 560064, India ' School of Mechanical Engineering, REVA University, Rukmini Knowledge Park, Kattigenahalli, Yelahanka, Bengaluru, Karnataka, 560064, India ' Department of Mechanical Engineering, National Institute of Technology Karnataka, Srinivas Nagar, Surathkal, Mangalore, Karnataka, 575025, India ' Department of Mechanical Engineering, National Institute of Technology Karnataka, Srinivas Nagar, Surathkal, Mangalore, Karnataka, 575025, India

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.

Keywords: full car; MR damper; modified Bouc-Wen; NSGA-II; optimisation; fuzzy logic; Indian average road.

DOI: 10.1504/IJVP.2021.113411

International Journal of Vehicle Performance, 2021 Vol.7 No.1/2, pp.21 - 40

Received: 19 Apr 2019
Accepted: 12 Sep 2019
Published online: 04 Mar 2021 *

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