Design And Research Of Motor Type Active Stabilizer Bar System

The vehicle roll motion occurs when vehicles turn or run on an uneven road.Too large roll motion leads to poor vehicle roll stability and yaw stability.Due to the fixed stiffness,the traditional stabilizer bar cannot enhance vehicle roll and yaw dynamics,which means limited performance.As a typical representative of the active roll control system,electric active stabilizer bar(ASB)system has gained increasing attention.The system can produce active anti-roll torque,and dynamically distribute anti-roll torque of front and rear axle,which improves vehicle roll and yaw dynamics.In this paper,taking a domestic light commercial vehicle as the target objection,the electric active stabilizer system control algorithm and development platform are deeply studied.Firstly,vehicle dynamics model and road input model are established by MATLAB/Simulink,and theoretical analysis and verification are conducted.Secondly,according to the system's control function,the system's performance requirements are analyzed,and the structure scheme,ECU design scheme are presented.The physical prototype is trial-manufactured.Based on V-model and dSPACE,the development platform of electric active stabilizer bar system is put forward.Then,the system's overall control scheme is proposed based on the hierarchical control method.The upper-level controller calculates the required vehicle anti-roll torque based on roll state information,and realizes the vehicle roll stability control.The middle-level distributor dynamically distributes anti-roll torque of front and rear axle based on yaw state information,and realizes the vehicle yaw stability control.The lower-level controller motor angle control based on actuator's state information of the,and realizes the accurate output anti-roll torque of front and rear axle.Finally,the off-line simulation,rapid control prototype and hardware-in-the-loop test of electric active stabilizer bar system are carried out under typical maneuvers.The simulation and experimental results show that the proposed control algorithm for electric active stabilizer system can meet the system's performance requirements,realize the tracking control of the vehicle roll angle and yaw rate,and improve the vehicle roll stability and yaw stability.