Control system for vibratory apparatus

Details Control system for vibratory apparatus Control system for vibratory apparatus

1996-03-26

1998-07-07

Williams, Hezron E.

Measuring and testing

Vibration

Vibrator

73668, 1987501, 1987521, 198751, G01M 702, B65G 2504

Patent

active

057772320

ABSTRACT:
In a vibratory apparatus including vibratory speed detector for detecting a vibratory speed of a vibratory machine, a self-excited oscillation controller for amplifying the output of the vibratory speed detector at a feed-back gain K, receiving the output of the vibratory speed detector as a positive feed-back signal, a power amplifier for power-amplifying the output of the self-excited oscillation controller and a vibratory exciter receiving the output of the power amplifier for vibrating the vibratory machine, the feed back gain K is changed in accordance with the equation; K=K.sub.1 .DELTA.r+K.sub.3 (.DELTA.r).sup.3 +Kcr, where .DELTA.r represents the amplitude difference between a predetermined amplitude and the present amplitude, K.sub.1, K.sub.3 constants, and Kcr critical stability gain.

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