An Automatic Vehicle Speed Control System with Consideration of Various Uncertainties*

In this paper, an automatic vehicle speed control system with PID controller and Kalman filter is designed with consideration of various uncertainties, such as disturbance, system variation and feedback sensor noise, and then verified through computer simulations. The performance degradation due to disturbance and system variation in the basic open-loop control is shown. To resolve this problem, a PID controller based feedback system is designed for the automatic vehicle speed control system. In addition, to improve the performance degradation due to feedback sensor noise that may occur during the feedback process, the Kalman filter is applied for the automatic vehicle speed control system. Ultimately, it is verified that the designed automatic vehicle speed control system with PID controller and Kalman filter not only satisfies all performance criteria but also has the ability to reject disturbance, cope with system variation and reduce feedback sensor noise.