Effectiveness of Differential Control and Parameters Decision Method by Fuzzy Inference in Variable Characteristics Steering System of Automobile

Abstract

A steer-by-wire technology creates new automobile steering control that was impossible in past days. Since this technology can vary the characteristics of the steering system, the characteristics adapted to drivers and running conditions can be made. In this study, we conduct a simulation of the variable characteristics steering system in an emergency lane change to avoid an obstacle on a road. We use PID control for the variable characteristics steering system, and the values of the proportional gain and the differential gain are determined moment by moment by fuzzy control. The usefulness of the variable characeristics steering system with fuzzy gain-switching is clarified.