Fault feature learning and classification method based on 1DCNN and GRU fusion

A 1D-CNN, classification method technology, applied in neural learning methods, instruments, biological neural network models, etc., can solve the problem of non-image sequence fault feature extraction and classification, etc.
CN110555479AActive Publication Date: 2019-12-10BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2019-12-10

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Abstract

The invention discloses a water chilling unit fault feature learning and classification method based on 1DCNN and GRU fusion, and solves the problems that an existing method consumes time and is difficult to process mass data. The method comprises the following steps: firstly, preprocessing collected continuous-time fault sequence information under different working conditions to construct a sample set; secondly, carrying out preliminary feature extraction on the sample set by adopting a dimension reduction algorithm; then, creating a 1DCNN-GRU neural network model; during training, enabling fault features of a training sample at the same moment to act as input of a time step of the network model, adopting a cross entropy loss function, model parameters are adjusted in combination with a back propagation BP algorithm, enabling Softmax regression to act as a classification algorithm, conducting iterative updating on the network model parameters, and finishing model training. The methodnot only can extract the dynamic information between the local features of the sequences and the sequences, but also can realize real-time classification diagnosis of faults.
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Description

technical field

[0001] The invention belongs to the field of condition monitoring and fault diagnosis of water chillers based on a big data environment, and in particular relates to a learning and classification method for chiller fault features based on the fusion of 1DCNN and GRU. Background technique

[0002] With the rapid development of computer and sensor technology, modern industrial systems are showing a trend of complexity and integration, and the data reflecting the operating mechanism and status of the system show the characteristics of "big data". As the key equipment of the refrigeration system of the data center, the chiller includes a condenser, a compressor, an evaporator, an expansion valve, a chilled water circulation system and a cooling water circulation system. Its main function is to provide a cold source for the computer room and ensure the normal operation of the data center. . The occurrence of chiller failures will reduce the system performance, ca...

Claims

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