Title:
CONTROL DEVICE AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2015/045176
Kind Code:
A1
Abstract:
This invention prevents overshoot of a measured value (PV) while keeping response fast. A control-computation unit (5) determines an operation quantity (NV) in accordance with an adjusted gain. On the basis of a deviation and the rate of change of said deviation, a fuzzy inference unit (feedback-gain calculation unit) (9) determines a feedback gain for adjusting the aforementioned gain. A feedback-gain correction unit (19) determines the acceleration of the deviation, i.e. the rate at which the rate of change of the deviation changes relative to the deviation itself, and a first prediction value indicating the rate of change that it is predicted that the deviation will exhibit upon reaching zero. The feedback-gain correction unit (19) also determines the change in the acceleration of the deviation, i.e. the rate at which the acceleration of the deviation changes relative to the deviation itself, and a prediction value indicating the acceleration that it is predicted that the deviation will exhibit upon reaching zero. From the deviation, the first prediction value for the rate of change of the deviation, and the prediction value for the acceleration of the deviation, the feedback-gain correction unit (19) determines a second prediction value indicating the rate of change that it is predicted that the deviation will exhibit upon reaching zero, and if said second prediction value satisfies a prescribed condition, the determined feedback gain is corrected and outputted to the control-computation unit (5).
Inventors:
IZAKI KATSUTOSHI (JP)
YANO KENJI (JP)
KIHARA TAKESHI (JP)
SUGIHARA YOSHIROH (JP)
YANO KENJI (JP)
KIHARA TAKESHI (JP)
SUGIHARA YOSHIROH (JP)
Application Number:
PCT/JP2013/076610
Publication Date:
April 02, 2015
Filing Date:
September 30, 2013
Export Citation:
Assignee:
RKC INSTRUMENTS INC (JP)
International Classes:
G05B13/02
Foreign References:
| JPH07281710A | 1995-10-27 | |||
| JP2005212054A | 2005-08-11 |
Attorney, Agent or Firm:
KIKUCHI KOICHI (JP)
Koichi Kikuchi (JP)
Koichi Kikuchi (JP)
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