Title:
METHOD FOR CALCULATING DIGITAL CONTROLLED VARIABLE
Document Type and Number:
Japanese Patent JPH04184510
Kind Code:
A
Abstract:
PURPOSE:To output a correct controlled variable even immediately after a target position changes by not outputting command values to an object to be controlled until all of the deviated values obtained from a prescribed difference equation from the last (m) times of sampling including the current sampling are updated to the deviated amount corresponding to a target value when the target value is newly set. CONSTITUTION:In a digital controller 2 for control, a subtractor 3 calculates the position deviated amount in between a target position (r) and the current position Xn of an object to be controlled, a magnetic head actuator 9, and a command value output bus decision section 4 does not make output from the first to the m-th sampling times when the target position (r) is updated. A command value arithmetic section 5 operates controlling command values and prepares difference equations for the differences between positional deviated amounts ento (en-m) of the last (m) times of samplings including the current sampling and past controlling command values (Un-1) to (Un-n). Therefore, a correct controlled variable can be outputted even immediately after a target position is changed in accordance with a seek instruction, etc., and futile processing time can be reduced further.
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Inventors:
KUSHIBIKI HIDEAKI
Application Number:
JP31519690A
Publication Date:
July 01, 1992
Filing Date:
November 20, 1990
Export Citation:
Assignee:
TOKICO LTD
International Classes:
G05B21/02; G05D3/12; (IPC1-7): G05B21/02; G05D3/12
Attorney, Agent or Firm:
Masatake Shiga (2 outside)
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