Self-Excited Driving and Active Vibration Control on Vibratory Machine by Velocity Feedback Control with Variable Gain.

Abstract

This paper describes velocity feedback control with variable gain for a vibratory machine which has a nonlinear resonance curve. Vibration of the vibratory machine and movement of a work are coupled through normal force and friction force. The coupled vibration is nonlinear, and the resonance frequency changes according to the work mass and vibration amplitude. Self-excited vibration by positive velocity feedback follows the resonance frequency change automatically. In changing from positive feedback gain to negative feedback gain in velocity feedback control, self-excited vibration is suppressed actively. Self-excited driving starts up vibration and transportation quickly, and active vibration control stops those quickly. The mathematical model of the vibratory machine simulates the behavior of the actual vibratory machine exactly.