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Implicit fault diagnosis method and system considering disturbance

A technology of hidden faults and diagnostic methods, applied in the direction of instruments, complex mathematical operations, design optimization/simulation, etc., can solve the problem of ignoring the impact of fault diagnosis

Active Publication Date: 2020-12-01
ROCKET FORCE UNIV OF ENG
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Problems solved by technology

In addition, existing studies ignore the impact of disturbances on fault diagnosis

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  • Implicit fault diagnosis method and system considering disturbance
  • Implicit fault diagnosis method and system considering disturbance
  • Implicit fault diagnosis method and system considering disturbance

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Embodiment Construction

[0089] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0090] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0091] figure 1 It is a schematic flow chart of the implicit fault diagnosis method considering disturbance in the present invention. like figure 1 As shown, the present invention considers the implicit fault di...

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Abstract

The invention relates to an implicit fault diagnosis method and system considering disturbance. The method comprises the steps of obtaining an implicit fault diagnosis model, wherein the implicit fault diagnosis model comprises a state equation and an observation equation, the state equation is a state equation constructed based on a disturbance evidence reasoning rule, and the state equation is used for estimating hidden fault characteristics of the equipment, the state equation is used for estimating actual observation information of the equipment, acquiring equipment observation informationacquired at the current moment, judging whether the equipment is disturbed at the current moment according to the equipment observation information, if yes, estimating the implicit fault characteristics of the equipment and the actual observation information of the equipment by adopting an implicit fault diagnosis model, and determining an implicit fault diagnosis result of the equipment, and ifnot, estimating the implicit fault characteristics of the equipment by adopting the implicit fault diagnosis model, and determining an implicit fault diagnosis result of the equipment. According to the invention, the accuracy of implicit fault diagnosis can be improved.

Description

technical field [0001] The invention relates to the field of fault diagnosis, in particular to a method and system for implicit fault diagnosis considering disturbance. Background technique [0002] According to the observability, the faults of complex systems are usually divided into observable faults and hidden faults. In engineering practice, technicians cannot directly detect the latter fault state, so the diagnosis of hidden faults in the system has also begun to receive widespread attention. Taking the inertial navigation system as an example, drift is the main factor determining its navigation accuracy and working performance, and directly characterizes the fault state of the system. However, during the operation of the system, the drift cannot be directly obtained, but can only be reflected by some state quantities such as characteristic voltage, current or pulse signal. If technicians cannot effectively grasp the drift state of the system, potential faults in the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01C25/00G06F17/11G06F17/16G06F17/18
CPCG06F30/20G06F17/11G06F17/16G06F17/18G01C25/005
Inventor 胡昌华唐帅文周志杰曹友宁鹏云张春潮王杰
Owner ROCKET FORCE UNIV OF ENG
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