Fault detection method, system and device for liquid rocket engine and medium

A liquid rocket and fault detection technology, applied in neural learning methods, computer-aided design, genetic rules, etc., can solve the problems of low detection accuracy, inability to meet real-time detection, slow detection speed, etc., and achieve high system sensitivity and robustness sticky effect

CN113569472AInactive Publication Date: 2021-10-29SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a fault detection method, system and device for a liquid rocket engine and a medium, and the method comprises the steps of constructing a first BP neural network model according to the structural features of the liquid rocket engine; optimizing the first BP neural network model by adopting an adaptive genetic algorithm to obtain an optimal weight and an optimal threshold; according to the optimal weight and the threshold value, building an AGABP network model; inputting historical data of the liquid rocket engine during normal work into the AGABP network model for training, and obtaining a second AGABP network model; inputting real-time data of the liquid rocket engine into the second AGABP network model, comparing an output result of the second AGABP network model with real-time detection data of a sensor in the liquid rocket engine, and judging whether the liquid rocket engine breaks down or not. According to the invention, real-time fault detection can be carried out on working of the liquid rocket engine, and compared with a BP neural network model prediction result, the method has higher system sensitivity and robustness.
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Description

technical field

[0001] The invention relates to the technical field of engine fault detection, in particular to a liquid rocket motor fault detection method, system, equipment and medium. Background technique

[0002] Liquid rocket engine (Liquid Rocket Engine, LRE) is an important power device and component of the launch vehicle system. Its reliability and safety are necessary guarantees for the successful completion of aerospace tasks. Through effective fault diagnosis and health management of liquid rocket engines, It can reduce the probability of accidents and reduce unnecessary property losses. Currently, fault detection methods for liquid rocket engines are mainly divided into three categories: model-driven methods, data-driven methods, and artificial intelligence-based methods.

[0003] At present, in the method of fault detection for liquid rocket engines, the method based on model needs to establish a system model according to the law of system operation, and the a...

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Embodiment Construction

[0054]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.

[0055] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the execution order of the steps.

[0056] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a", ...