Search International and National Patent Collections

1. (WO2015045175) FUZZY CONTROL DEVICE AND FUZZY CONTROL METHOD

Pub. No.:    WO/2015/045175    International Application No.:    PCT/JP2013/076609
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Tue Oct 01 01:59:59 CEST 2013
IPC: G05B 13/02
Applicants: RKC INSTRUMENT INC.
理化工業株式会社
Inventors: IZAKI Katsutoshi
井▲崎▼ 勝敏
YANO Kenji
矢野 堅嗣
KIHARA Takeshi
木原 健
SUGIHARA Yoshiroh
杉原 義朗
Title: FUZZY CONTROL DEVICE AND FUZZY CONTROL METHOD
Abstract:
In this invention, an inference cycle for fuzzy inference is adjusted so as to reduce unnecessary inference while still obtaining adequate fuzzy-inference results. This fuzzy control device is provided with: a fuzzy inference unit (9) that performs fuzzy inference at intervals of the aforementioned inference cycle; a control-computation unit (5) that determines, in accordance with inference results from the fuzzy inference unit (9), an operation quantity (MV) to output to a control subject (3); a rate measurement unit (7) that determines the rate of change (edot) of the deviation of a measured value (PV) from the control subject (3) with respect to a target value (SV); and an inference-cycle calculation unit (17) that calculates the inference cycle in accordance with the rate of change (edot) of said deviation. The inference cycle, which can be varied while the control subject is being controlled, is appropriately changed such that, for example, the amount of change of said deviation is constant.