Dsp-based Four-wheel Steering Control System

As one of the main methods of improving the controlling stability, the technology of Four-Wheel-Steering (FWS) has directly affected the veracity and precision of steering. This thesis has a comprehensive analyze and study on the working principles, steering requirements, controlling methods and controlling scheme of the system of FWS. Also this thesis accomplishes the hardware design of the controlling system utilizing DSP and the software utilizing CC2000 software. On the base of realizing the steering of front-wheel, steering of four-wheel and steering of crab-crawl, this paper puts great emphasis on assuring the steering relation between the wheels on the two sides. At the same time, we use closed-loop controlling method of PID in order to assure the real-time controlling and precision of steering. It also optimizes the PID-parameter by MATLAB software. Finally, the function and property of the controller is verified and adjusted by experiment.