مقايسه عملكرد كنترل فازي و بهينه در سيستمهاي تعليق فعال خودرو

The stiffness and clamping coefficients are constant and time invariant for passive suspension systems. This makes the vehicle suspension system to be far from desired performance under some road irregularities and inputs. Therefore, the controlled suspension systems including active and semi-active have been proposed in order to provide improved car dynamic performance under various road conditions. In this paper, using a non-liner full car suspension model with seven degrees of freedom, application of both fuzzy and optimal controllers have been studied for active and semi-active suspension systems. In this study, using computer simulation, both ride comfort and handling characteristics have been evaluated for active and passive suspension systems under random and bump road inputs. The results demonstrate great advantage of the active suspension performance in comparison with the passive system. Also, the ability of fuzzy controller was comparable with optimal control approach.