active front wheel steering system (afs)
Post on 30-Dec-2015
84 Views
Preview:
DESCRIPTION
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 - PowerPoint PPT Presentation
TRANSCRIPT
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
• Combination of mechanical and electrical systems
Assumptions in modeling and control AFS
Fx = 0 (No braking or throttle inputs)
- Fyf = Cf f
- Fyr = Cr r
Where Cf = cornering stiffness of front tires
Cr = cornering stiffness of rear tires
wheel side slip angle
top related