Title:
FOLLOW-UP CONTROL DEVICE
Document Type and Number:
Japanese Patent JPS63298608
Kind Code:
A
Abstract:
PURPOSE:To execute the follow-up without any error by providing a digital filter to output a sine wave signal string with a special frequency group as a component to a pulse input in a control device. CONSTITUTION:A follow-up control device has a motor 1, a head 2 fitted to this, a servo amplifier 3, a digital filter 4 and a digital dynamic compensating device 5 and is, further provided with an error amplifier 6, a D/A converter 7 and an A/D converter 8. At this time, as the digital filter 4, a filter to output, to a pulse input, the sine wave signal string of the frequency group of the (n) components selected in the sequence among the larger level out of the frequency components of the position fluctuation of a track is used. The above- mentioned compensating device 5 is designed based on the observer theory. Thus, the device can stably follow up without any error to the position fluctuation component of a main track.
Inventors:
UMEDA YOSHIO
Application Number:
JP13517387A
Publication Date:
December 06, 1988
Filing Date:
May 29, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G05B11/36; G05B21/02; G05D3/12; G11B21/10; (IPC1-7): G05B11/36; G05B21/02; G05D3/12; G11B21/10
Attorney, Agent or Firm:
Toshio Nakao