论文部分内容阅读
以4轴客车为研究对象,建立4轴客车车辆的6自由度垂向主动悬挂的动力学模型。主动悬挂的常规控制策略往往对系统本身因素所引起的响应滞后问题表现出无所适从,因此,借助测定的未来目标信号或外扰,对主动悬挂设计一个预见控制器来抑制车辆系统的垂向振动。研究结果表明,采用预见控制策略使车体的垂向振动加速度响应幅值降低60%,转向架的垂向振动加速度响应幅值降低30%左右,同时系统可按设定目标值预见步数为20提前作出响应。
Taking 4-axle passenger car as the research object, a dynamic model of 6-DOF vertical active suspension for 4-axle passenger car is established. The conventional control strategy of active suspension often shows a loss of response lag caused by the system itself. Therefore, a predictive controller of active suspension is designed to suppress the vertical vibration of the vehicle system by means of the measured future target signals or external disturbances. The results show that the predictive control strategy reduces the vertical vibration acceleration response amplitude of the vehicle body by 60% and the vertical vibration acceleration response amplitude of the bogie decreases about 30%. At the same time, the system predicts the number of steps as 20 to respond in advance.