Method for detecting abnormality of high-speed incremental aircraft engine

An aero-engine, anomaly detection technology, applied in the intersection of mechanical engineering and information science, can solve the problems of inconsistent data length, low efficiency, poor effect, etc., to achieve fast and effective detection and make up for low efficiency.

Inactive Publication Date: 2017-09-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The purpose of the present invention is to invent a method for abnormal detection of aero-engine based on the performance parameter data of aero-engine. Based on this method, the abnormality of aero-engine ca

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  • Method for detecting abnormality of high-speed incremental aircraft engine
  • Method for detecting abnormality of high-speed incremental aircraft engine
  • Method for detecting abnormality of high-speed incremental aircraft engine

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[0016] The present invention will be further described below with reference to the accompanying drawings and related algorithms.

[0017] The overall flow of the present invention is as follows figure 1 shown.

[0018] The invention utilizes the aero-engine performance parameter data for abnormal detection, and uses the exponential smoothing method to process the aero-engine performance parameters after removing outliers. The performance parameters are characterized using a variance-based adaptive segmentation algorithm for the processed data. A dynamic time warping algorithm based on adaptive line segment is used to measure the similarity of sequences, and a density-based clustering algorithm is used to establish a performance parameter pattern mining model, thereby mining a performance parameter pattern library. The newly added incremental data is matched with the pattern library to obtain anomaly detection results. The specific implementation steps are as follows:

[00...

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Abstract

The invention discloses a method for detecting abnormality of a high-speed incremental aircraft engine. The method comprises the following steps: selecting parameters of original data; smoothly treating the parameter data; representing data properties in a self-adapting fragmenting manner on basis of variance; performing similarity measurement on the data on the basis of dynamic time warping algoirhtm of the self-adapating line framgnets; building a mode excavation model to form a performance parameter mode library; then matching incremental data with each mode in the mode library to obtain the abnormality detection result. The method has the advantage of being fast to detect abnormality of incremental data on the basis of the properties of large performance parameter data quantity, high dimension, different data length and extremely few abnormality data of the aircraft engine.

Description

technical field [0001] The invention relates to a high-speed incremental aero-engine anomaly detection method, in particular to an anomaly detection method under the background of large amount of data and few abnormal data, and belongs to the cross field of mechanical engineering and information science. Background technique [0002] As the heart of the aircraft, the aero-engine is the most important component of the aircraft. The health of the aero-engine directly determines the flight status of the aircraft. With the rapid development of the aviation industry, aero-engines have developed from the initial piston engines to today's turboshaft engines, turbofan engines, etc. While greatly improving the performance of aero-engines, their structures have become more and more complicated. Therefore, the maintenance of aero-engine is becoming more and more difficult, and its maintenance cost is also getting higher and higher. According to data, among the aircraft maintenance cos...

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Application Information

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IPC IPC(8): G06F19/00G06K9/62
CPCG16Z99/00G06F18/23
Inventor 皮德常唐王
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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