Title:
HUNTING DETECTION DEVICE, AND HUNTING DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/215147
Kind Code:
A1
Abstract:
A hunting detection device (1) is provided with: a deviation feature quantity calculating unit (31) which calculates a deviation feature quantity by performing frequency analysis of the deviation between the value of operating instruction information (SP) input into a manipulator (10) for driving the final control element of a feedback control system, and the value of behavior information, which is either one of an output (MV) from the manipulator (10) to the final control element or a control quantity of a controlled object; a similar feature quantity calculating unit (32) which performs frequency analysis of the respective values of the operating instruction information (SP) and the behavior information, to calculate a similar feature quantity between the operating instruction information (SP) and the behavior information; and a hunting determination unit (4) which determines the presence or absence of a hunting phenomenon and the need for maintenance of the manipulator (10) on the basis of the deviation feature quantity and the similar feature quantity.
Inventors:
HIRAO KOICHIRO (JP)
YAMASAKI FUMIAKI (JP)
YAMASAKI FUMIAKI (JP)
Application Number:
PCT/JP2021/010767
Publication Date:
October 28, 2021
Filing Date:
March 17, 2021
Export Citation:
Assignee:
AZBIL CORP (JP)
International Classes:
G05B23/02; G05B5/01; G05B11/36
Domestic Patent References:
| WO2020110354A1 | 2020-06-04 |
Foreign References:
| JPH0793002A | 1995-04-07 | |||
| JP2014122669A | 2014-07-03 | |||
| JP2011183428A | 2011-09-22 | |||
| JP2006085382A | 2006-03-30 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki (JP)
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