Steady-State Rigid-Body Dynamic Response of Cam-Follower Mechanisms
The camshaft of a cam-follower mechanism experiences a position-dependent moment due to the force exerted on the cam by the follower, causing the angular speed of the camshaft to fluctuate. In this work, a method to expediently predict the camshaft speed fluctuation is developed. The governing equation of motion is derived assuming that the cam-follower system is an ideal one wherein all members are treated as rigid. An existing closed-form numerical algorithm is used to obtain the steady-state rigid-body dynamic response of a machine system. The solution considers a velocity-dependent moment; specifically, a resisting moment is modeled as a velocity-squared damping. The effects of flywheel size and resisting moment on camshaft speed fluctuation are studied. The results compare favorably with those obtained from transient response using a direct integration scheme. The analytical result also shows excellent agreement with the camshaft speed variation of an experimental cam-follower mechanism. The steady-state rigid-body dynamic response obtained herein also serves as a first approximation to the input camshaft speed variation in the dynamic analysis of flexible cam-follower mechanisms in a subsequent research.
A. I. Mahyuddin and A. Midha, "Steady-State Rigid-Body Dynamic Response of Cam-Follower Mechanisms," American Society of Mechanical Design, Design Engineering Division, American Society of Mechanical Engineers (ASME), Jan 1994.
1994 ASME Design Technical Conferences
Mechanical and Aerospace Engineering
Keywords and Phrases
Algorithms; Camshafts; Damping; Dynamic Loads; Dynamic Response; Equations of Motion; Flywheels; Machine Vibrations; Mechanisms
Article - Conference proceedings
© 1994 American Society of Mechanical Engineers (ASME), All rights reserved.