US 11,629,653 B2Granted

Observation apparatus, observation method, and non-transitory computer readable medium storing a program

AssigneeJapan Aerospace Exploration Agency

InventorsToshio Nishizawa, Junichi Kazawa, Hiroshi Gotoda, Hiroaki Kobayashi, Yuto Hayashi, Takayoshi Hachijo

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Abstract

[Object] To observe the sign or occurrence of an unstable operation of a turbo-machine. [Solving Means] An observation apparatus 1 includes: a detection unit 10 including one or two or more sensors 11, 12 that are disposed in a turbo-machine 2, are highly time responsive, and observe unsteady fluctuations of the turbo-machine 2; a computation unit 20 that output signals from the one or two or more sensors 11, 12 every moment, stores time series data for a predetermined period, and calculates in real time a parameter for detecting an unstable operation of the turbo-machine; and a determination unit 30 that compares the parameter for detecting the unstable operation with a predetermined threshold and outputs in real time a determination result of a sign or occurrence of the unstable operation.

Claims15

Dependent claims

An observation apparatus, comprising:

a detection unit including two or more sensors that are disposed in a turbo-machine, are highly time responsive, and observe unsteady fluctuations of the turbo-machine;
a computation unit that output signals from the two or more sensors every moment, stores time series data for a predetermined period, and calculates in real time a parameter for detecting an unstable operation of the turbo-machine;
a determination unit that determines a sign or occurrence of the unstable operation on a basis of the parameter for detecting the unstable operation;
and
a control unit that outputs, when the determination unit outputs a determination result of the sign or occurrence of the unstable operation, a signal for changing an operation condition for an operation control apparatus of the turbo-machine and/or a signal for warning of an operation of the turbo-machine,
wherein the computation unit calculates the parameter for detecting the unstable operation by quantitatively evaluating randomness and a recurrence change on a basis of the time series data,
wherein the detection unit includes two or more types of detection units, the computation unit includes two or more types of computation units, and the determination unit includes two or more types of determination units,
wherein the two or more types of computation units calculate two or more types of parameters for detecting the unstable operation by quantitatively evaluating randomness and the recurrence change on the basis of the time series data, and
wherein the two or more types of determination units determine the sign or occurrence of two or more types of the unstable operation at a same time.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/046,943Filed 25 Mar 2019
Priority: JP JP2018-07909617 Apr 2018
Published: US 2021/0164406 A13 Jun 2021
Granted: 18 Apr 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

F02C 9/28
Control of fuel supply: regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed
F23R 3/28
Continuous combustion chambers using liquid or gaseous fuel: characterised by the fuel supply
F01D 21/003
Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for: arrangements for…
F01D 21/14
Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for: responsive to other…