Fuzzy Control of Active Suspension System using Full Car Model

摘要

A suspension system consists of spring and oil damper connected between vehicle body and tire to control the vertical moment of car body. The main purpose of suspension system is to reduce the effect of road disturbance on vehicle body by minimizing the displacement and acceleration of vehicle body. The main objective of suspension system is to provide ride comfort for passenger which depends on soft suspension system and better road handling capacity which depends on hard suspension. Design of suspension involves an optimization process where the design elements are selected by compromising on soft and hard suspension. A suspension system classified into passive suspension, semi active suspension and active suspension. A passive suspension system does not require any external energy source and its damping coefficient values are almost constant. In active suspension, force actuator placed in between wheel and vehicle body along with suspension system. The active suspension systems are closed loop systems where the suspension travel of suspension system measured to predict the actuator force needed for active suspension system. Nowadays, many researcher focusing research on active suspension systems [1] due to its ability to operate wide range frequency. The development of computer and microprocessor improved practical implementation of active suspension [2-3] in automotive industries.