Simulation Study on the Fuzzy Control of Automobile Semi-active Suspension

The two-degree of freedom suspension model of one quarter coach was built up.A two-input one-output fuzzy controller was designed.And taking the filtered white noise as random road input signal the simulation studies of semi-active suspension model with the software of Matlab/Simulink was carried out.Simulation results show that compared with the passive air suspension,the fuzzy controlled air suspension could be used to reduce the sprung mass acceleration and improve ride comfort in some degrees.But the effects on reducing wheel dynamic load and suspension dynamic displacement are not evident and fuzzy control method needs to use with other control methods to gain better vibration control effect.