1 / 13

Active Front Wheel Steering System (AFS)

Active Front Wheel Steering System (AFS). Chapter 2. Conventional Steering System. Rack and pinion system Constant steering ratio Fully mechanical system. AFS. Wheel steer angle = superposition of steering wheel angle and AFS actuator Variable steering ratio

vandenberg
Download Presentation

Active Front Wheel Steering System (AFS)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Active Front Wheel Steering System (AFS) Chapter 2

  2. Conventional Steering System • Rack and pinion system • Constant steering ratio • Fully mechanical system

  3. AFS • Wheel steer angle = superposition of steering wheel • angle and AFS actuator • Variable steering ratio • Combination of mechanical and electrical systems

  4. Vehicle Handling Model (without side wind force)

  5. Vehicle Handling Model (with side wind force)

  6. Assumptions in modeling and control AFS • S Fx = 0 (No braking or throttle inputs) • Fyf = Cf af • Fyr = Cr ar Where Cf = cornering stiffness of front tires Cr = cornering stiffness of rear tires a = wheel side slip angle

  7. Controller Structure of AFS

  8. Wind model

  9. Performance Comparison of AFS and non-AFS vehicles

  10. Yaw Rate AFS Non-AFS

  11. Lateral acceleration

  12. Simulation Data • m=3950 • Iz=6172 • Lf=1.1 • Lr=1.36 • Cf=71600 • Cr=77130 • Vx=20 • Lw=0.4

More Related