SAE 1: Four Wheel Steering Progress Report

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SAE 1 Four Wheel SteeringProgress Report

• Clyde Baker
• Ken Brown
• Alex Cherukara
• Kevin Eady

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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

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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

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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

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Recent Achievements

• Front Steering System

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Recent Achievements

• Completed force analysis
• Redesign of rear system

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Recent Achievements

• Design of rear system using geometry to achieve
  desired wheel angles
• Design abandoned due to odd steering arm lengths
  and rack vulnerability

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Recent Achievements

• Designed Steering Gear Box
• Rear to front steering gear ratio is 12

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Current Work

• Current work includes
• Modeling system in Pro-E and Pro-Mechanica
• Calculating maximum forces exerted on steering
  system

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Future Work

• Future work includes
• Analysis in Adams
• Material selection for components based on force
  analysis
• Locating/pricing possible components.