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Abstract
An active suspension of large-sized buses by using fuzzy logic is considered. The active control for the suspension is determined by minimizing the mean squares of vertical and rotary accelerations of vehicle body subject to the constraints of suspension and tyre deflections. The vehicle model is assumed to be a linear system with six degrees of freedom excited by road profiles. The tuning of fuzzy control rules and associated parameters that characterize the active control is carried out where two kinds of road profiles are considered. In the simulation results, the proposed active suspension shows improved performance over passive suspension