Abstract:DC motor has a wide speed range, steady and smooth speed performance. The starting torque is large, easy-to-play parking, etc., especially suitable for use in high speed requirements of the occasion. Traditional PID DC speed control changes in working conditions need to adjust the parameters of the adaptive process is complex and difficult. The paper addresses this issue. This paper analyzes the operating characteristics of the DC motor constructed fuzzy rule table PID parameter adjustment, the theoretical analysis and simulation. On this basis, we design and implement a fuzzy PID DC speed control system for DC motor speed to control and display self-adaptivly. We design a fuzzy PID DC speed control system. The system consists of two parts and lower PC program controller, which uses the host computer program written in Visual Basic, is used to set the PID parameters, communication ports, speed display; lower controller uses ARM S3C2440 as the core control unit, including the IGBT drive section, H-bridge reversible circuits, communications circuits, power, speed feedback circuit. Simulation and practical experiments show that the system not only improves the adaptability, but also improves the speed and accuracy quickly. In addition, the modular system structure, easy to spread, can be used for the actual speed of occasions and education and training bench, has some theoretical and practical significance.