Race Car Steering Redesign - PowerPoint PPT Presentation

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Race Car Steering Redesign

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Race Car Steering Redesign Group 6: Joseph Haydu Brian Quinn Noelle Bomberger Assisted by Jim Waterman Advisor: Jan Nazalewicz, P. E. Overview Objectives Optimized ... – PowerPoint PPT presentation

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Title: Race Car Steering Redesign


1
Race Car Steering Redesign
  • Group 6
  • Joseph Haydu
  • Brian Quinn
  • Noelle Bomberger
  • Assisted by
  • Jim Waterman
  • Advisor
  • Jan Nazalewicz, P. E.

2
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

3
Previous System
4
Analysis of Previous System
  • Geometry did not comply to Ackermann Equations
  • System became mis-aligned regularly
  • Investigated quick release mechanism

5
Ackermann Equations
  • R (B/2) L / tan(ain)
  • aout ArcTan 1/ (B/L)(1/Tan(ain))

R - Radius of Turn B - Distance between front and
rear axle L - Distance to convergent point of
steering linkages ain - Angle of inside wheel
turn aout - Angle of outside wheel turn
6
Ackermann Geometry
7
Steering System
  • Steering Wheel
  • Quick Release
  • Steering Column
  • Rack and pinion Gearing
  • Steering Linkages

8
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

9
Ackermann Analysis
  • New Design Analysis

Old Design Analysis
10
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

11
Linkage Redesign
12
Linkage Redesign
13
Model of New Steering System
14
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

15
Quick Release Designs
16
Still to come
  • Final Report
  • Testing
  • Cushion stoppages to prevent damage and
    mis-alignment due to mechanical shock
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