Title: Ride comfort performance of different active suspension systems

Authors: Daniel A. Mantaras, Pablo Luque

Addresses: Area de Ingenieria e Infraestructura de los Transportes, Universidad de Oviedo, Campus de Viesques, s/n, 33203 Gijon, Spain. ' Area de Ingenieria e Infraestructura de los Transportes, Universidad de Oviedo, Campus de Viesques, s/n, 33203 Gijon, Spain

Abstract: This paper presents a comparative of different active and semi-active suspension systems in order to research the improvement in ride comfort and handling stability compared with the equivalent passive systems. The two-degrees-of-freedom model (quarter-car model) is employed in the analysis of seven different active suspension control strategies: LQR-LQG, Robust design, Kalman filter, Skyhook damper, Pole-assignment, Neural network and Fuzzy logic. Computer simulations of the different active models and the equivalent passive systems are performed to obtain the vertical acceleration of the sprung mass and the vertical wheel load variation. The vertical acceleration of the sprung mass is processed to evaluate the ride comfort behaviour and the vertical wheel load variation is used to evaluate the handling stability of the different active suspension control systems.

Keywords: active suspension; vehicle suspensions; fuzzy logic; handling stability; Kalman filter; LQR-LQG; neural networks; passive suspension; pole-assignment; ride comfort; robust design; skyhook damper; vehicle design; vehicle suspension; modelling; quarter-car model; simulation; vertical acceleration; sprung mass; vertical wheel load; load variation; suspension control.

DOI: 10.1504/IJVD.2006.008456

International Journal of Vehicle Design, 2006 Vol.40 No.1/2/3, pp.106 - 125

Available online: 21 Dec 2005 *

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