Nonlinear Dynamics of a Planar Mechanism With Cam and Clearance

Abstract

A planar mechanism with three moving links is connected to a cam. The investigation of the dynamic simulation of crank arm and connecting rod in the existence of clearance in cam follower system is studied against cam speeds. Nonlinear response for crank arm, connecting rod, and roller follower is simulated at various clearances and various cam speeds. Nonlinear dynamic tool are used to quantify local Lyapunov exponent. The periodicity of nonlinear response is detected using phase-plane diagram, power density function, and Poincare’ map. Solidworks program is needed in the simulation of point linear displacement. The impact and friction are considered in SolidWorks based on the value of sliding contact velocity and kinetic coefficient of friction. The impact of coefficient of restitution is investigated between the cam and the follower and between the follower and its guides. The trend of the nonlinear response of the crank arm and the connecting rod are discussed.