Motorcycle Chatter AnalysisMotorcycle Chatter Analysis

Professor GrandaME270 Fall 2007

December 13, 2007

Aaron CourterDaniel Monterrubio

ObjectiveObjective

Background Information– Video Demonstration

Analysis of Vehicle DynamicsBond Graph AnalysisExpected ResultsContinued Analysis

Background InformationBackground Information

Engine BrakingChatter-VibrationWhen phenomenon occurs

Video DemonstrationVideo Demonstration

Analysis of Vehicle DynamicsAnalysis of Vehicle DynamicsFBDτEB = Engine Braking Torque

FEB = Engine Braking Force on Ground

Ff=uN= Frictional Force between Tire and Ground

wT=Angular Velocity of Wheel and Tire

N=Normal Force When FEB>Ff

Slip Occurs

Insert FBD hand drawn

Analysis of Vehicle DynamicsAnalysis of Vehicle Dynamics

FBD Cont’ When Slip Exists, FEB > Ff , Chatter function

(Source Flow) is required.

FEB-Ff a Chatter Function Input Assumptions

– wT is held constant during deceleration– τEB is decaying input function (TBD) which

proportional to the difference of the Vehicle Velocity and the Tire Velocity (v=r*wT)

Analysis Cont’Analysis Cont’

Physical Model

Bond Graph AnalysisBond Graph Analysis

Bond Graph

Bond Graph Analysis Cont’Bond Graph Analysis Cont’

Simulation Input

Chatter Function (input)

0

5

10

15

20

FEB-Ff

So

urc

e F

low

in

pu

t

Expected ResultsExpected Results

Continued AnalysisContinued Analysis

Simulink AnalysisS-Function AnalysisAnalysis of Slipper Clutch (Thesis?)

– Evaluation of Optimum Spring Constant– FEA (ME 272)– Vibration Analysis– Solid Model Animation

Questions?Questions?