Estimation device and estimation method

Patent metadata

Field	Value
Publication number	US-12498684-B2
Application number	US-202118017535-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 31, 2020
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

An estimation device includes an observation system constraint determination unit configured to determine data within constraints that is data within a first constraint based on time series data of each observation value of a first observation value observed by a first observation system and a second observation value observed by a second observation system, a model estimation unit configured to estimate parameters of a plurality of models including an observation model that is a model of each of the observation systems and a physical model that is a model within an apparatus provided with each of the observation systems based on the data within constraints, and a consistency determination unit configured to determine consistency of the models based on a deviation between a first predicted observation value predicted from the second observation system based on the estimated parameters and the first observation value.

First claim

The invention claimed is:

1 . An estimation device comprising:
an observation system constraint determination unit configured to determine data within constraints that is data within a first constraint based on time series data of each observation value of a first observation value observed by a first observation system and a second observation value observed by a second observation system; a model estimation unit configured to estimate parameters of a plurality of models including an observation model that is a model of each of the observation systems and a physical model that is a model within an apparatus provided with each of the observation systems based on the data within constraints; and a consistency determination unit configured to determine consistency of the models based on a deviation between a first predicted observation value predicted from the second observation system based on the estimated parameters and the first observation value.

2 . The estimation device according to claim 1 , further comprising:
a physical quantity constraint determination unit configured to determine whether a physical quantity estimated value that is a physical quantity within the apparatus estimated based on the parameters is within a second constraint.

3 . The estimation device according to claim 1 , further comprising:
a model constraint determination unit configured to determine whether each parameter is within a third constraint.

4 . The estimation device according to claim 1 , wherein
the model estimation unit obtains a deviation between physical quantity estimated values that are physical quantities within the apparatus and are estimated based on the parameters from each of three or more systems in a network model including the plurality of models.

5 . The estimation device according to claim 1 , further comprising:
an intervention measure unit capable of changing the parameters by intervention to the physical model.

6 . The estimation device according to claim 5 , wherein
the intervention measure unit includes a feedback controller configured to feed back the first observation value to the physical model and to change the parameters.

Assignees

• Mitsubishi Heavy Ind Ltd
• Mitsubishi Heavy Ind Thermal Systems Ltd

Inventors

• Oka Hirotaka
• Nomura Masumi
• Ishiguro Tatsuo
• Morita Katsuaki
• Ikeda Ryuji
• Nagahara Kenichi
• KOGAWA Sota
• Matsukura Noriyuki
• Nikaido Satoshi
• Nishizaki Yuki

Classifications

• G06F17/17

  Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method ({G06F17/18 takes precedence } ; interpolation for numerical control G05B19/18) · CPC title

• G06N5/04

  Inference or reasoning models · CPC title

• G05B13/042 Primary

  in which a parameter or coefficient is automatically adjusted to optimise the performance · CPC title

• G05B23/0243 Primary

  model based detection method, e.g. first-principles knowledge model · CPC title