Title: Road-frequency based optimisation of damping coefficients for semi-active suspension systems

Authors: Arjon Turnip; Keum-Shik Hong

Addresses: School of Mechanical Engineering, Pusan National University; 30, Jangjeon-dong, Gumjeong-gu, Busan 609-735, Korea ' Department of Cogno-Mechatronics Engineering, School of Mechanical Engineering, Pusan National University; 30, Jangjeon-dong, Gumjeong-gu, Busan 609-735, Korea

Abstract: In this paper, a sequential quadratic programming method for determining the optimal damping coefficients of a semi-active suspension system is investigated. Two objective functions (i.e., mean squares of the sprung-mass absolute acceleration and the dynamic load) are minimised under four constraints. By splitting the road frequency range into four regions, the optimal damping coefficients in individual regions are obtained. Simulation results of three cases (passive, semi-active with optimal static damping coefficients, and semi-active with optimal dynamic damping coefficients) show that the semi-active suspension system significantly improve the ride comfort, road holding, and reduce the noise and harshness.

Keywords: suspension control; semi-active damping; road frequency; ride comfort; road holding; optimisation; modified skyhook control; damping coefficients; semi-active suspension systems; sequential quadratic programming; sprung-mass absolute acceleration; dynamic load; vehicle noise; harshness.

DOI: 10.1504/IJVD.2013.055493

International Journal of Vehicle Design, 2013 Vol.63 No.1, pp.84 - 101

Available online: 12 Jun 2013 *

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