Proposed Critical Damping for a Spring Mass System to Avoid Stick Slip: Fid-Bau Portal

Proposed Critical Damping for a Spring Mass System to Avoid Stick Slip

Yadav, J. / Agnihotri, G.

Abstract Friction is the primary concern of all mechanical systems having contacting surfaces in relative motion and is a major source of loss of power and performance. Friction introduces vibrations in a system; stick-slip induced vibration is one of them. Stick-slip can result when friction coefficient decreases with velocity, usually at low velocity. In most practical sliding applications, fluctuations of the sliding velocity are detrimental and so objectionable. Stick slip is critical in determining the lower performance bounds of a machine. One of the ways to eliminate stick slip from a system is to incorporate it with proper damping. A complete and universal analytical explanation of these observations is an important area of research in the field of system dynamics and control. In this work, the problem of dynamic behavior of a mass being dragged on a dry surface is studied in detail in the light of stiction friction models. The objective of this work is to identify proper damping for the set of other influencing parameters to eliminate stick slip from the system. In order to examine this range, numerical simulation is conducted on a model consisting of a spring-mass-damper system, dragged with constant velocity on a rough surface.