Title: A fuzzy model of rider control for a motorcycle undergoing lane change

Authors: J.C. Wu, T.S. Liu

Addresses: Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30050, Taiwan, Republic of China. ' Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30050, Taiwan, Republic of China

Abstract: A rider-motorcycle system can be treated as a representative man-machine system in view of the major role that both the rider and the motorcycle play in determining the performance of the integrated system. Of interest in this work is the handling property which is crucial to safety during riding. In this study, a mathematical model of three-dimensional multi-body dynamics is constructed, which accounts for not only motorcycle dynamics but also the rider|s posture change. Since a fuzzy controller is essentially a nonlinear process representing the qualitative knowledge of human experts on the behaviour of systems and desired control actions, a fuzzy control method is applied to determine a rider|s handling action. The fuzzy controller based on fuzzy rules and fuzzy reasoning methods plays the role of the rider in a rider-motorcycle system. Accordingly, a rider-motorcycle system undergoing lane change is simulated. The time variation of steering angle, yaw rate, and lateral acceleration are demonstrated. Effects of yaw rate and lateral acceleration on handling property are examined based on Bode plots.

Keywords: fuzzy control; lane changing; motorcycle handling; rider-motorcycle systems; fuzzy modelling; rider control; motorcycles; motorbikes; vehicle safety; rider handling; mathematical modelling; multi-body dynamics; motorcycle dynamics; rider posture change; steering angle; yaw rate; lateral acceleration.

DOI: 10.1504/IJVD.1994.061903

International Journal of Vehicle Design, 1994 Vol.15 No.1/2, pp.27 - 44

Published online: 28 May 2014 *

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