Pi Dawei

Design and experimental validation of control algorithm for vehicle hydraulic active stabilizer bar system

This paper presents a novel active roll control algorithm for vehicle hydraulic active stabilizer bar system. The mechanical structure and control scheme of hydraulic active stabilizer bar system is detailed. The anti-roll torque controller is designed with “Proportional-Integral-Differential (PID) + feedforward” algorithm to calculate the total anti-roll torque. A lateral acceleration gain and roll rate damping are added into “PID + feedforward” controller, which can improve vehicle roll dynamic response. The torque distributor is introduced based on fuzzy–PID algorithm to distribute the anti-roll torque of front and rear stabilizer bar dynamically, which can improve vehicle yaw dynamics response. The actuator controller is used for realizing the closed-loop control of the actuators displacement and generating the accurate anti-roll torque. The hardware-in-the-loop simulation platform is established based on AutoBox and active stabilizer bar actuators. The hardware-in-the-loop experiment is carried out under typical maneuvers. Experimental results show that the proposed control algorithm improves the vehicle roll and yaw dynamics response, which can enhance the vehicle roll stability, yaw stability, and ride comfort.

Design and simulation of hierarchical control algorithm for electric active stabilizer bar system

A novel hierarchical control design of electric active stabilizer bar(ASB) system has been proposed. This control algorithm is aimed to generate and distribute active anti-roll torques between two active stabilizer bars, which can change the roll stiffness of front and rear suspension systems of the vehicle in real time. And fuzzy control theory is adopted to design the control algorithm of ASB dynamic distribution. Through modeling and simulating under various standard maneuvers in MATLAB/Simulink, the reliability and precision of the control system have been illustrated. And the ASB system based on level control algorithm makes great improvement on the roll stability, ride comfort and handling stability of vehicles.