Comparative Analysis of Passenger Ride Comfort Using Various Semi- Active Suspension Alternatives

In this paper, different semi-active control strategies for non-linear quarter car model equipped with controllable magneto-rheological (MR) shock absorbers and fuzzy logic controller are compared. Polynomial model is selected to characterize the experimental results of MR shock absorber. A combination of Forward Fuzzy Logic Controller (FFLC) and Inverse Fuzzy Logic Controller (IFLC) is designed for proper working of MR shock absorber i.e. generation and supply of control current to MR shock absorber, which provides damping force to suspension system for vibration control purpose. Simulink responses of four different cases are evaluated for passenger ride comfort analysis taking uncontrolled, primary suspension controlled, secondary suspension controlled and fully controlled quarter car models. The obtained results in graphical and mathematical form demonstrate that the fully controlled quarter car system provides excellent performance in suppression of passenger seat vibrations compared to other control strategies while the vehicle travels over the sinusoidal type of input road profile.