Abstract: This paper describes the design of intelligent car control system hardware and software, the entire system is involved in car models mechanical structure adjustment, the sensor circuit design and signal processing, control algorithms and strategies to optimize other aspects. A 16-bit free scale microcontroller MC9SXS128 was selected as the controller; information of road condition and car speed collected by the integrated laser tubes could be obtained by the single chip. Digital PID and PWM control techniques are used to real-time control the servo steering and front wheel steering angle, so as to guarantee a fast and safe driving of smart car along the given path.

Keywords: MC9S12XS128, Laser sensors, Intelligent Tracking PID speed control