Active front steering(AFS) system is able not only to vary steering ratio between steering wheel and tire wheel but also to steer front tires independently. In this paper, steering gear ratios and an active steering algorithm are proposed for the AFS system. Steering gear ratio is a function of vehicle speed and steering angle. Active steering is generated when the error of yaw-rate is larger than some threshold. To verify the performance of yaw stability, hardware-in-the-loop simulation system is made up of column type active steering system, driving display, steering effort reaction system and controller

Abstract
 1. 서론
 2. 기어비 가변 및 능동 조향 시스템
 3. 요 거동 안정화 제어
  3.1 조향 기어비 가변 로직
  3.2 능동 조향 로직
 4. HILS에 의한 모의시험
  4.1 HILS 시스템 구성
  4.2 모의시험 결과
 5. 결론
 후기
 참고문헌

• 최주용(경성대학교 메카트로닉스공학과) | Ju Yong Choi