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Xiaohang Jin - IEEE Xplore Author Profile

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Health status assessment plays an important role in guaranteeing equipment operating safety and reducing maintenance cost. Traditional deep learning (DL) methods require large amounts of labeled samples for training, making them ineffective in most practical scenarios with few-shot labeled samples. To address this challenge, we propose a novel knowledge graph metric learning network (KGMLN) for fe...Show More
Accurate prediction of the remaining useful life (RUL) of a general-purpose heat source radioisotope thermoelectric generator (GPHS-RTG) is critical for mission scheduling and power allocation in spacecraft. The key challenges in this task are long-term predictability and uncertainty quantification due to the limited data and variations in load conditions. However, little reported literature can b...Show More
Faults can cause a reduction or complete interruption in the wind power generation of wind turbines, making it crucial to detect faults at its early stage to allow for timely maintenance and replacement decisions, and to prevent significant economic losses. However, many fault detection methods that rely on analyzing Supervisory Control and Data Acquisition (SCADA) data are not sensitive enough to...Show More
Fault detection (FD) algorithms based on supervisory control and data acquisition (SCADA) data have been widely used in the operation and maintenance (O&M) of wind turbines (WTs). However, the performance of FD models will degrade due to the time-varying operating conditions (TVOC). Incremental learning (IL) methods can be employed to update the models online to adapt to TVOC, but the error accumu...Show More
Optical fibers serve as both signal transmission channels and sensing units in distributed fiber sensing systems (DFSs). The sensor’s detection signal may be adversely affected by multiple forms of attenuation due to unavoidable bending and splices during fiber installation. Ensuring signal reliability requires precise calibration of signal attenuation. The attenuation calibration of multiple meas...Show More
Condition monitoring of wind turbines (WTs) is essential for advancing wind energy. Existing data-driven methods heavily rely on deep learning and big data, leading to challenges in distinguishing true faults from false alarms, impacting operational decisions negatively. Thus, this paper proposes a spatio-temporal graph neural network framework that incorporates prior knowledge. Prior WT knowledge...Show More
The deep learning (DL)-based method for predicting remaining useful life (RUL) has gained lots of attention in the industrial equipment sector. Due to the complexity of modern industrial equipment and the necessity of monitoring multivariate time-series data to obtain comprehensive health information, DL models with spatio-temporal feature extraction have been developed to achieve accurate RUL pre...Show More
As a commonly used model for anomaly detection, the autoencoder model for anomaly detection does not train the objective for extracted features, which is a downside of autoencoder model. In addition, it is well known that the autoencoder model has over-prominent reconstruction ability for anomalous data, leading to high false-negative rate. On the other hand, the deep support vector data descripti...Show More
Traditional fault diagnosis methods mainly rely on a single sensor signal, such as vibration or generator current signals, thus it often leads to limited diagnosis accuracy, primarily when multiple faults exist at the same time. Considering the electromechanical coupling characteristics of the electromechanical drive system, different sensors usually contain correlated and complementary informatio...Show More
Supervisory control and data acquisition (SCADA) data-based wind turbine blade icing detection has been widely studied due to its low cost and easy access. However, SCADA data often present severe class imbalance and thus challenge accurate icing detection. Moreover, since data distribution discrepancy exists in both spatio-temporal features of SCADA data from different wind turbines, the well-tra...Show More
Remaining useful life (RUL) prediction based on machine learning assumes that there are enough representative data for training models. However, it is impossible to have so many representative data considering security, economy factors, and so on. Thus, an incremental learning based RUL prediction approach is proposed to address this problem. First, a novel sequence input vector is constructed fro...Show More
Remaining useful life (RUL) prediction is of great significance to ensure the safety and reliability of equipment. Graph neural network (GNN)-based methods show great potential to improve RUL prediction performance by extracting spatiotemporal (ST) features from sensor monitoring data; however, current methods construct sensor-based homogeneous graphs without considering equipment component struct...Show More
With the development of wind energy, the condition monitoring (CM) methods of wind turbines (WTs) based on supervisory control and data acquisition (SCADA) data have attracted much attention to detect potential faults. With the impact of complicated internal and external factors, the operation conditions of WTs are time-varying. Thus, it is necessary to adaptively update CM models in long-term ope...Show More
In order to build an effective condition monitoring (CM) model for the target wind turbines (WTs) with few operational data, an approach based on the feature transfer learning and a modified generative adversarial network is proposed. First, a large amount of labelled data from WTs are analyzed to construct a CM model with the aid of an autoencoder. This forms the knowledge of CM for WTs in the so...Show More
Blades icing will seriously affect the performance of wind turbines with respect to power loss and dynamic load increase. Blades icing detection technique becomes necessary to advance de-icing maintenance. Extracting effective features from supervisory control and data acquisition (SCADA) data has become a challenging task during operating conditions under icing. Current research work lacks for th...Show More
The healthy operation conditions of wind turbines (WTs) with insufficient data need attention, but they face the problems of data imbalance and lack of labels. Aiming at the condition monitoring (CM) of these WTs, a CM method based on transfer learning and one-class classification (OCC) is proposed. This method uses the source WT data to help learn information about monitoring data from the target...Show More
Prognostics and health management applications rely heavily on predicting industrial equipment’s remaining useful life (RUL). The traditional RUL prediction approaches mainly consider the nonlinear mapping relationship of time series data but rarely consider the structural information of the equipment, resulting in low prediction accuracy. In order to improve the effectiveness of RUL prediction, t...Show More
Bearing is a key component in rotary machines. Their failures may cause the abrupt shutdown of these machines, which would result in substantial economic losses. Therefore, the prediction of the remaining useful life (RUL) of bearings is regarded as one of the critical approaches to avoid failure of bearings and their systems. In this article, an ensemble data-driven approach is proposed to predic...Show More
Utility-scale wind turbines are equipped with a supervisory control and data acquisition (SCADA) system for remote supervision and control. The SCADA system accumulates a large amount of data that contains the health conditions of the wind turbines. Thus, it is interesting to mine the health status-related information from SCADA data for wind turbine condition monitoring. In this article, an ensem...Show More
Bearing failure can cause their host system shutdown, and even some catastrophic accidents. These will lead to a high maintenance cost and a huge economic loss. Thus, health monitoring and fault prognosis for bearings becomes increasingly important. Developing an effective health index (HI) will do help in these works. Hence, three different HIs are developed by using root mean square, Kolmogorov-...Show More
Bearing is a critical component widely used in rotary machines. Bearing failure can cause damages of other components and lead to a lengthy downtime of the machine and costly maintenance. To reduce the cost and downtime for maintenance of the machines, it is desirable to perform fault prognostics to enable predictive health management for bearings. This paper proposes a new data-driven approach fo...Show More
This paper proposes a new bearing fault detection framework that is based on multivariate statistical process control methods. In this framework, historical offline normal data are used to train the models and calculate the control limits of the monitored metrics. Then, bearings' new online data are the input to the trained models to obtain their monitoring metrics, which are compared with the con...Show More
Bearings are one of the critical components widely used in rotary machines. Bearing failure can be catastrophic and may lead to a lengthy downtime of systems for maintenance. Bearing fault prognostics can help reduce the cost for maintenance and avoid catastrophic failures of the systems. This paper proposes a new data-driven approach for bearing fault prognostics, which is based on the Kolmogorov...Show More
Gearboxes are widely used in rotary machines, such as wind turbines, automobiles, and helicopters. Gearbox failures contribute to a significant proportion of the total failures and downtime in these machines. Gearbox fault diagnosis is an effective means to prevent catastrophic failures, improve reliability, and reduce downtime and maintenance costs. Vibration-based approaches have been employed i...Show More
Gearboxes are widely used in rotary machines, such as wind turbines, automobiles, and helicopters. Failures of gearboxes contribute to a significant portion of the total failures and downtime in these machines. Gearbox fault diagnosis is an effective means to prevent catastrophic failures, improve the reliability, and reduce the downtime and maintenance cost of these machines. Vibration-based appr...Show More