race car steering redesign

8/6/2019 Race Car Steering Redesign

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Race Car Steering RedesignRace Car Steering Redesign

Group 6:Group 6:

Joseph HayduJoseph Haydu

Brian QuinnBrian Quinn

Noelle BombergerNoelle Bomberger

Assisted byAssisted by Jim WatermanJim Waterman

Advisor:Advisor:

Jan Nazalewicz, P. E.Jan Nazalewicz, P. E.


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OverviewOverview

ObjectivesObjectives

Optimized designOptimized design

Give future group head start in competitionGive future group head start in competition DeliverablesDeliverables

Reports and Presentations for ME 424Reports and Presentations for ME 424

Final design and AnalysisFinal design and Analysis

Fabricated steering systemFabricated steering system


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Previous SystemPrevious System


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Analysis ofPrevious SystemAnalysis ofPrevious System

Geometry did not comply to AckermannGeometry did not comply to Ackermann

EquationsEquations

System became misSystem became mis--aligned regularlyaligned regularly Investigated quick release mechanismInvestigated quick release mechanism


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Ackermann EquationsAckermann Equations

R = (B/2) + [L / tan(R = (B/2) + [L / tan(inin)])]

outout= ArcTan{ 1/ [(B/L)+(1/Tan(= ArcTan{ 1/ [(B/L)+(1/Tan(inin))] }))] }

R - Radius of Turn

B - Distance between front and rear axle

L - Distance to convergent point of steering linkages

in - Angle of inside wheel turn

out - Angle of outside wheel turn


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Ackermann GeometryAckermann Geometry


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Steering SystemSteering System

Steering WheelSteering Wheel

Quick ReleaseQuick Release

Steering ColumnSteering Column Rack and pinion GearingRack and pinion Gearing

Steering LinkagesSteering Linkages


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Turning PerformanceTurning Performance

InputsInputs Total car weight (W) = 815 lbfTotal car weight (W) = 815 lbf

Height of car Center of Gravity from road (h) = 1.5 ftHeight of car Center of Gravity from road (h) = 1.5 ft

Distance between wheels on axles (wb) = 3.92 ftDistance between wheels on axles (wb) = 3.92 ft Coefficient of friction for wheels is 1Coefficient of friction for wheels is 1

Information from Ackerman EquationsInformation from Ackerman Equations

Assumed weight distribution even between front and rearAssumed weight distribution even between front and rearaxlesaxles

Outputs ConditionsOutputs Conditions Car tippingCar tipping

Sliding sidewaysSliding sideways


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New Design AnalysisNew Design Analysis

Ackermann AnalysisAckermann Analysis

Old Design AnalysisOld Design Analysis


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Linkage SpecificationsLinkage Specifications

Rack and pinion in front of axleRack and pinion in front of axle

Ackermann SteeringAckermann Steering

Minimize fabrication for maximum benefitMinimize fabrication for maximum benefitAnalyzed model through SolidWorks toAnalyzed model through SolidWorks to

minimize error from Ackermann Equationsminimize error from Ackermann Equations

Final Decision: Construct and test new linkagesFinal Decision: Construct and test new linkages


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Linkage RedesignLinkage Redesign


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Linkage RedesignLinkage Redesign


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Model of New Steering SystemModel of New Steering System


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Quick Release GoalsQuick Release Goals

Minimize time for driver to exit vehicleMinimize time for driver to exit vehicle

Difficult to false triggerDifficult to false trigger

Ease of useEase of use ErgonomicsErgonomics

Final decision: not sufficient improvement overFinal decision: not sufficient improvement overexisting design to warrant constructionexisting design to warrant construction


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Quick Release DesignsQuick Release Designs


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Still to comeStill to come

Final ReportFinal Report

TestingTesting

Cushion stoppages to prevent damage and misCushion stoppages to prevent damage and mis--alignment due to mechanical shockalignment due to mechanical shock

race car steering redesign

Documents