Title:
SAMPLE VALUE CONTROL TYPE POSITIONING SYSTEM
Document Type and Number:
Japanese Patent JPS59119421
Kind Code:
A
Abstract:
PURPOSE:To execute positioning to a target position without causing an overshoot by switching a contrl mode to a position control mode from a speed control mode at a position prescribed in advance. CONSTITUTION:A mode switching controlling circuit 3 moves a magnetic head 6 being a movable element to a position Xc prescribed in advance along a command speed CV. That is to say, until the head reaches the position Xc, the mode is a speed control mode. Subsequently, when the head arrives at the position Xc, the speed control mode is switched to a position control mode. In this position control mode, a command position signal from a position instructing circuit 2 is shifted to a target position signal in accordance with a period DELTAt of a sample control signal, and a position error signal corresponding to it is outputted from the controlling circuit 3. In this way, positioning can be executed to a target position without causing an overshoot.
Inventors:
HASEGAWA SUSUMU
MIZOSHITA YOSHIBUMI
MIZOSHITA YOSHIBUMI
Application Number:
JP22837882A
Publication Date:
July 10, 1984
Filing Date:
December 27, 1982
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G05D3/12; G05B19/39; G05B21/02; G11B21/10; (IPC1-7): G05B21/02; G05D3/12; G11B21/10
Domestic Patent References:
| JPS5712455A | 1982-01-22 |
Attorney, Agent or Firm:
Furuya Fumio