Abstract:
Based on analyses of characteristics of
Magneto-rheological (MR) damper, a hierarchical fuzzy intelligent
controller is proposed for vibration control of an automotive vehicle
with MR dampers. This controller consists of control level and
coordination level. In the control level, a semi-active fuzzy logic
controller is designed for each MR suspension system based on a
hybrid control strategy of sky-hook control and ground-hook
control. In the coordination level, a coordination controller is
designed to coordinate the four independent semi-active fuzzy logic
controllers by adjusting their output parameters according to the
system feedback. To validate the results of hierarchical fuzzy
intelligent control, a MR semi-active suspension control and test
system is set up and is implemented on a mini bus, which is
equipped with four controllable MR dampers. Test results indicate
that the hierarchical fuzzy intelligent controller can effectively
reduce the vertical vibration and improve the ride comfort and
handle stability of automobile.
