Optimal Vibration Control for Active Suspension Systems with Actuator Delay

Abstract

This paper deals with the vibration control problem for active suspension systems with actuator delay. Based on the model transformation, the actuator-delayed system is transformed into an equivalent nondelayed one. The delay effect is compensated by a control memory term in the designed controller. The vehicle vibration is reduced by a feedforward compensator. An observer is constructed to make the disturbance state in feedforward control physically realizable. Numerical simulations illustrate the effectiveness and the simplicity of the proposed controller.

Keywords:

• Time-delay
• optimal control
• feedforward and feedback
• vibration control
• quarter-car suspension

Acknowledgments

This research was supported by the National Natural Science Foundation of China (Grant No. 11061039), the Yunnan Natural Science Foundation (Grant No. 2011FZ169), and the Yunnan Software Engineer Key Laboratory Open Foundation (Grant No. 2011SE15).