Motorcycle Chatter Analysis Professor Granda ME270 Fall 2007 December 13, 2007 Aaron Courter Daniel Monterrubio

Objective Background Information – Video Demonstration Analysis of Vehicle Dynamics Bond Graph Analysis Expected Results Continued Analysis

Background Information Engine Braking Chatter-Vibration When phenomenon occurs

Video Demonstration

Analysis of Vehicle Dynamics FBD τ EB = Engine Braking Torque F EB = Engine Braking Force on Ground F f =uN= Frictional Force between Tire and Ground w T =Angular Velocity of Wheel and Tire N=Normal Force When F EB >F f Slip Occurs Insert FBD hand drawn

Analysis of Vehicle Dynamics FBD Cont’ When Slip Exists, F EB > F f, Chatter function (Source Flow) is required. F EB -F f a Chatter Function Input Assumptions – w T is held constant during deceleration – τ EB is decaying input function (TBD) which proportional to the difference of the Vehicle Velocity and the Tire Velocity (v=r*w T )

Analysis Cont’ Physical Model

Bond Graph Analysis Bond Graph

Bond Graph Analysis Cont’ Simulation Input

Expected Results

Continued Analysis Simulink Analysis S-Function Analysis Analysis of Slipper Clutch (Thesis?) – Evaluation of Optimum Spring Constant – FEA (ME 272) – Vibration Analysis – Solid Model Animation

Questions?