With the rapid development of automobile industry and the rapid growth of the number of highway,demands for safety and comfort in driving had been increasing. So more and more attentions were paid to the research of control method of cruise control system. First, the mathematical model of vehicle longitudinal motion was established. Then based on the Matlab Simulink toolbox,respectively by using conventional PID control and fuzzy PID control to study the model,the advantages and disadvanta-ges of two different control methods were compared. The simulation results showed that the system had a quicker response speed in the fuzzy PID control and the control result was better. The conclusion provided the reference for the selection of control method for the cruise control system.%随着汽车工业的飞速发展和高速公路数量的快速增长,人们对汽车驾驶的安全性和舒适性的要求不断提高,因而,对汽车巡航系统控制方法的研究也越来越受到人们的重视.首先建立汽车纵向运动的数学模型,然后基于Matlab的Simulink工具箱,分别应用常规 PID控制和模糊PID控制对所建模型进行仿真研究,比较两种不同控制方法的优缺点.仿真结果表明:在模糊PID控制方案下系统响应速度更快,控制效果更理想.所得结论为巡航系统控制方法的选取提供了参考依据.
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