Automotive industry is growing widely and rapidly by the involving of multi-fields not only mechanical engineering but also electrical and electronic engineering, material and more. As a key system in vehicles, suspension system and its control have been studied for a long time. A well-controlled suspension system provides high vehicle handling, good drivability and high comfort for passengers, and good isolation from road noise and vibration. To enhance comfort and handling of light-weight vehicles, semi-active suspension system is considered and proposed by numbers of papers. A semi-active suspension features small system space, low complexity and easy maintenance. Therefore, it is suitable for small compact car body known as light vehicles. This paper focuses on the analysis and control of a semi-active suspension for light-weight vehicles. Models of a quarter-car suspension with air spring and magneto rheological damper were built. Because components in the system involve nonlinear dynamic characteristics, a self-tuning Fuzzy logic controller was designed. Simulation results showed that the designed suspension system with its controller had good performance in vibration suppression.
Modelling and Control of Air Bellow based Active Suspension System
