轨迹跟踪 用PID控制器或者模糊控制器来控制小车的行走。 编写了小车能绕过障碍并且延者给定的轨迹行走，其中小车的轨迹要事先给定。 -Trajectory tracking fuzzy controller with PID controller to control the car or walking. Prepared a car can go around the obstacle and the extension of those who walk a given traj