首页|Fault diagnosis of HVAC system with imbalanced data using multi-scale convolution composite neural network

Fault diagnosis of HVAC system with imbalanced data using multi-scale convolution composite neural network

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Accurate fault diagnosis of heating,ventilation,and air conditioning(HVAC)systems is of significant importance for maintaining normal operation,reducing energy consumption,and minimizing maintenance costs.However,in practical applications,it is challenging to obtain sufficient fault data for HVAC systems,leading to imbalanced data,where the number of fault samples is much smaller than that of normal samples.Moreover,most existing HVAC system fault diagnosis methods heavily rely on balanced training sets to achieve high fault diagnosis accuracy.Therefore,to address this issue,a composite neural network fault diagnosis model is proposed,which combines SMOTETomek,multi-scale one-dimensional convolutional neural networks(M1DCNN),and support vector machine(SVM).This method first utilizes SMOTETomek to augment the minority class samples in the imbalanced dataset,achieving a balanced number of faulty and normal data.Then,it employs the M1DCNN model to extract feature information from the augmented dataset.Finally,it replaces the original Softmax classifier with an SVM classifier for classification,thus enhancing the fault diagnosis accuracy.Using the SMOTETomek-M1 DCNN-SVM method,we conducted fault diagnosis validation on both the ASHRAE RP-1043 dataset and experimental dataset with an imbalance ratio of 1:10.The results demonstrate the superiority of this approach,providing a novel and promising solution for intelligent building management,with accuracy and F1 scores of 98.45％and 100％for the RP-1043 dataset and experimental dataset,respectively.

fault diagnosischillerimbalanced dataSMOTETomekmulti-scaleneural networks

Rouhui Wu、Yizhu Ren、Mengying Tan、Lei Nie

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School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China

Industrial Research Institute of Xiangyang Hubei University of Technology,Xiangyang 441100,China

国家自然科学基金Funds for Science and Technology Creative Talents of Hubei,ChinaXiangyang Hubei University of Technology Industrial Research Institute Funding Program

519751912023DJC048XYYJ2022B01

2024

10.1007/s12273-023-1086-1

建筑模拟(英文版)

建筑模拟(英文版)

EI
ISSN：1996-3599
年,卷(期)：2024.17(3)
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