Abstract
This paper is concerned with an active suspension with preview of passenger cars using fuzzy reasoning. The model for motion of a vehicle is described by nonlinear differential equations with four degrees of freedom excited by irregular inputs from road surface. The active control for the suspension is constructed such that the mean squares of vertical and rotary accelerations of the vehicle body are minimized subject to the constraints of suspension and tire deflections. In the fuzzy control rules, the vertical accelerations and velocities of vehicle body at the front/rear suspension locations, and the preview information of road surface are denoted as input variables, and the linear combinations of input variables are denoted as output variables. The simulation results indicate that the proposed method is much improved in the suspension performance of the vehicle body.
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