Race Car Steering Redesign - Stevens Institute of Technology
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Transcript Race Car Steering Redesign - Stevens Institute of Technology
Race Car Steering Redesign
Group 6:
Joseph Haydu
Brian Quinn
Noelle Bomberger
Assisted by
Jim Waterman
Advisor:
Jan Nazalewicz, P. E.
Overview
Objectives
Optimized design
Give future group head start in competition
Deliverables
Reports and Presentations for ME 424
Final design and Analysis
Fabricated steering system
Previous System
Analysis of Previous System
Geometry did not comply to Ackermann
Equations
System became mis-aligned regularly
Investigated quick release mechanism
Ackermann Equations
R = (B/2) + [L / tan(αin)]
αout= ArcTan{ 1/ [(B/L)+(1/Tan(αin))] }
R - Radius of Turn
B - Distance between front and rear axle
L - Distance to convergent point of steering linkages
αin - Angle of inside wheel turn
αout - Angle of outside wheel turn
Ackermann Geometry
Steering System
Steering Wheel
Quick Release
Steering Column
Rack and pinion Gearing
Steering Linkages
Turning Performance
Inputs
Total car weight (W) = 815 lbf
Height of car Center of Gravity from road (h) = 1.5 ft
Distance between wheels on axles (wb) = 3.92 ft
Coefficient of friction for wheels is 1
Information from Ackerman Equations
Assumed weight distribution even between front and rear
axles
Outputs Conditions
Car tipping
Sliding sideways
Ackermann Analysis
Old Design Analysis
New Design Analysis
Linkage Specifications
Rack and pinion in front of axle
Ackermann Steering
Minimize fabrication for maximum benefit
Analyzed model through SolidWorks to
minimize error from Ackermann Equations
Final Decision: Construct and test new linkages
Linkage Redesign
Linkage Redesign
Model of New Steering System
Quick Release Goals
Minimize time for driver to exit vehicle
Difficult to false trigger
Ease of use
Ergonomics
Final decision: not sufficient improvement over
existing design to warrant construction
Quick Release Designs
Still to come
Final Report
Testing
Cushion stoppages to prevent damage and misalignment due to mechanical shock