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SAE 1: Four Wheel Steering Progress Report. Clyde Baker Ken Brown Alex Cherukara Kevin Eady. Project Overview. Reduce turning radius to 7 feet from 14 feet Use 4-wheel steering system Considerations: Driver performance and comfort Must not interfere with other components
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SAE 1: Four Wheel SteeringProgress Report Clyde Baker Ken Brown Alex Cherukara Kevin Eady
Project Overview • Reduce turning radius to 7 feet from 14 feet • Use 4-wheel steering system • Considerations: • Driver performance and comfort • Must not interfere with other components • Proper stability of car during competition • Rugged design to endure off-road course • Budget less than $500
Sponsor Meetings • Met with Dr. Hollis for assistance in calculating forces exerted on steering components • Advised team to use gearing to reduce rear rack travel rather than adjusting the geometry to achieve the desired rear wheel angles
Recent Achievements • Completed force analysis on front steering system • Highest stress at 30 degrees • Deceleration from 30 mph to 0 mph in 0.7 seconds • Factor of safety of 2 • Greatest stress on ½ inch tie rod end is approximately 1000 MPA
Recent Achievements • Front Steering System
Recent Achievements • Completed force analysis • Redesign of rear system
Recent Achievements • Design of rear system using geometry to achieve desired wheel angles • Design abandoned due to odd steering arm lengths and rack vulnerability
Recent Achievements • Designed Steering Gear Box • Rear to front steering gear ratio is 1:2
Current Work • Current work includes: • Modeling system in Pro-E and Pro-Mechanica • Calculating maximum forces exerted on steering system
Future Work • Future work includes: • Analysis in Adams • Material selection for components based on force analysis • Locating/pricing possible components.