寻迹小车，含详细的注释。1、电机有良好的驱动特性，可正、反转动，且转动平稳、有力；2、可靠的获取转速反馈信号；3、根据反馈信号使用有效的控制策略使电机达到所需的转速；4、利用码盘的反馈信号控制行走距离；5、　　可以根据命令实现电机的特殊运行状态：刹车、惰行。-Tracing car, with detailed notes. 1, the electrical drive has good features, can be positive and negative rotation, and rotation smooth, powerful　2, reliable access to speed feedback signal　3, according to feedback signal to control the use of effective strategies to achieve the required motor speed　4, the use of encoder feedback signal control walking distance　5, can realize under the command of the special motor running: brakes, Inerting line.