유성기어형 능동 전륜 조향 시스템을 이용한 조종성과 안정성 향상을 위한 제어알고리즘 개발

Abstract

Active Front Steering (AFS) system enables vehicle performance to improve directional stability control and driver convenience. AFS system is a complementary system for a front-steered vehicle that adds compensation angle at lower speed or subtracts at higher speed based on vehicle information and performance such as steering wheel angle, vehicle speed, lateral acceleration, yaw rate and road conditions. In this paper, planetary gear type AFS module modeling is used Bond graph method. Variable Gear Ratio(VGR) algorithm is considered vehicle speed and steering wheel angle for driver’s convenience. Active steering is proposed to improve vehicle yaw stability which use PID controller.