MULTIVARIABLE CONTROL OF A FRICTION-DAMPER-BASED VEHICLE SUSPENSION

抄録

This paper focuses on the Variable Structure Control (VSC) of an electro-hydraulically actuated friction damper suspension system for a motor vehicle. Four controlled servo-driven dry-friction dampers replace four conventional passive viscous dampers. A model of the vehicle and of the hydraulic drive is developed, a multivariable controller is designed and performance investigated via computer simulation. With a controller designed to improve bounce motion the semi-active system is predicted to have superior performance compared to a passive system in response to sinusoidal road input. Less clear cut benefits are predicted when the system is subjected to roll, random and bump inputs. Future work needs to focus on and-roll control schemes.