Automatic speed control device using self-tuning fuzzy logic

A fuzzy logic controller with a built-in function for self-tuning of control characteristics has been applied to an automatic speed control device (ASCD) to create a robust system for production vehicles. Fuzzy logic is used to predict drivers´ individual preferences for control characteristics when the vehicle speed is controlled to a set level by the ASCD system. The results are then reflected in the control characteristics to provide the preferred speed control.