The development of fuzzy logic based controller for semi-active suspension system

The purpose of any suspension system is to improve the ride quality and road handling. This is achieved by controlling the relative position and motion between vehicle body and wheels in order to reduce the effect of road profile variation. This paper introduces the concepts of fuzzy logic and its application toward the development of semi-active suspension system. The body-suspension-wheel system is modeled as a two degree-of-freedom model. The fuzzy logic based model is being developed based on two inputs. Suspension Velocity (SV) and Body Velocity (BV). The Control Signal (U), which is a function of the inputs, is determined from the rule base. The result shows major improvement over passive suspension and minor improvement over Skyhook method