A novel fuzzy-logic-based control for vehicle-active suspension is sug
gested. The vehicle vibration and disturbance are reduced considerably
with a fuzzy logic controller, to enhance comfort in riding faced wit
h uncertain road terrains. A quarter-car active suspension system is c
ontrolled to reduce the vertical acceleration to a level of, that of,
a hypothetical reference model. A new look-up table for the rule base
of the fuzzy logic controller has been developed. The parameters, like
, the spread, flex and centre of the bell-shaped membership functions
associated with the different linguistic variables are fine tuned by t
rial and error method to get the suspension acceleration and deflectio
n on par with that of the model. Simulation studies clearly demonstrat
e the effectiveness of the fuzzy logic controller for active suspensio
n systems. The performance of the fuzzy logic controller under variati
ons in the suspension component characteristics are also studied and w
as found to give reasonably good responses.