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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?