Title:
PID CONTROL METHOD
Document Type and Number:
Japanese Patent JPS59139404
Kind Code:
A
Abstract:
PURPOSE:To reduce the cost and to operate a process adaptively to even disturbance flexibly by calculating a forgetting factor, which is a parameter determining availability, on a basis of an identification error in an identifying part which identifies the process. CONSTITUTION:In a PID controller 6 of the process which controls automatically the temperature and etc. in a plant, a deviation e(t) between a control target r(t) and a control signal y(t) outputted from a process 1 is operated in an operating part 5. An operation signal u(t) of the process 1 is generated from a manipulated variable operating part 2 on a basis of this deviation, and PID parameters are adjusted in an identifying part 3 and a control parameter operating part 4. Though the identifying part 3 uses a preliminarily given forgetting factor to operate the identification quantity of the process, this forgetting factor is adjusted at every synchronous gamma by sampling control, and an information quantity attained by weighing the quantity, which indicates an identification error at a time (t+gamma), with parameters including the forgetting factor at a time (t) is used for this adjustment.
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Inventors:
SEKOZAWA TERUJI
SHIOTANI MAKOTO
FUNABASHI SEIJIYU
OONARI MIKIHIKO
ISHIDA MASAHIRO
SHIOTANI MAKOTO
FUNABASHI SEIJIYU
OONARI MIKIHIKO
ISHIDA MASAHIRO
Application Number:
JP1154983A
Publication Date:
August 10, 1984
Filing Date:
January 28, 1983
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05B21/02; G05B13/00; G05B13/02; G05B13/04; (IPC1-7): G05B13/02; G05B21/02
Attorney, Agent or Firm:
Akio Takahashi