Title:
STATE-CHANGE DETECTING DEVICE AND STATE-CHANGE DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/198590
Kind Code:
A1
Abstract:
Provided is a state-change detecting device that is capable of detecting a state change involving no change in the resonant frequency or a state change involving a reduction in the resonance peak value in a servo system. A state-change detecting device according to the present invention is provided with: a calculation means that measures gain-frequency characteristics of a servo system being evaluated and that calculates, as a feature of the servo system being evaluated, a value correlated with an integrated value of gains at individual frequencies within a frequency range being evaluated in the measured gain-frequency characteristics; and a determination means that determines whether or not the state of the servo system being evaluated has changed by comparing the feature calculated by the calculation means with the same feature in the past for the servo system being evaluated.
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Inventors:
URABE KENTARO (JP)
EGI MAMORU (JP)
EGI MAMORU (JP)
Application Number:
PCT/JP2019/014793
Publication Date:
October 17, 2019
Filing Date:
April 03, 2019
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
G05B23/02; G05B19/18; G05B19/4062; G05D3/12; G05D19/02; H02P29/00
Domestic Patent References:
| WO2008053772A1 | 2008-05-08 |
Foreign References:
| JP2009192837A | 2009-08-27 | |||
| JP2015156194A | 2015-08-27 | |||
| JP2016034224A | 2016-03-10 | |||
| JP2015216709A | 2015-12-03 | |||
| JP2013089089A | 2013-05-13 | |||
| JP2014035569A | 2014-02-24 | |||
| JP2017174180A | 2017-09-28 | |||
| JP2016034224A | 2016-03-10 |
Other References:
See also references of EP 3779627A4
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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