{"title":"Value of Information from Condition Inspection for a Gamma Degradation Process","authors":"W. Fauriat, E. Zio","doi":"10.1109/PHM-Paris.2019.00040","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00040","url":null,"abstract":"For components subject to continuous degradation appropriate maintenance decisions are needed for optimal operation in the presence of uncertainty regarding failure occurrence. Sometimes, uncertainty can be reduced through the collection of additional information on components' state. Value of Information (VoI) may be used to assess the impact of uncertainty reduction on the outcome of health management decisions. It is applied here in the context of a continuous degradation, modeled through a gamma process.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"63 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132501415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Soualhi, K. Nguyen, K. Medjaher, D. Lebel, D. Cazaban
{"title":"Health Indicator Construction for System Health Assessment in Smart Manufacturing","authors":"M. Soualhi, K. Nguyen, K. Medjaher, D. Lebel, D. Cazaban","doi":"10.1109/PHM-Paris.2019.00016","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00016","url":null,"abstract":"Smart manufacturing is a part of the fourth industry revolution (Industry 4.0), which offers promising perspectives for high reliability, availability, maintainability, and safety production process. Indeed, smart monitoring methods, that are implemented in this kind of manufacturing process, allow efficient tracking of a system degradation in real time through appropriate sensors. Then, the sensor data are analyzed and processed to extract effective health indicators for fault detection, diagnostic and prognostics. This paper aims to develop a practical methodology for constructing a new health indicator based on heterogeneous sensor measurements to efficiently monitor system states. The proposed methodology is applied to extract the health indicator of a robot cutting tool (i.e. end-flat mill). This indicator is then used to diagnose the different fault types of the tool by an adaptive neuro-fuzzy inference system model.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"173 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114622656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Data-Driven Anomaly Detection for UAV Sensor Data Based on Deep Learning Prediction Model","authors":"Benkuan Wang, Zeyang Wang, Liansheng Liu, Datong Liu, Xiyuan Peng","doi":"10.1109/PHM-Paris.2019.00055","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00055","url":null,"abstract":"Unmanned Aerial Vehicle (UAV) can accomplish various specific tasks and play an increasingly essential role in military, industrial and civil fields. However, the safety of the UAV is lower than that of manned aircraft, and great economic loss is caused due to its relatively high failure rate. Therefore, it is of great significance to study the anomaly detection method for the UAV system. In recent years, the deep learning method has been widely applied in various fields due to its outstanding advantages such as strong ability to approximate complex functions and automatic feature extraction. In this paper, a Long Short Term Memory (LSTM) Recurrent Neural Network method is proposed for the UAV anomaly detection. Firstly, a prediction model is formulated based on the training data set which contains only normal data, then the data at next time can be predicted. Secondly, according to the prediction results in train phase, we give an estimation of the prediction uncertainty. Finally, anomaly detection is achieved by comparing the prediction value with the uncertain interval. Real UAV sensor data with point anomalies in north velocity and pneumatic lifting velocity are used to verify the proposed method, and experimental results show that the proposed method can effectively detect point anomalies.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121633190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rubén Medina, M. Cerrada, Diego Cabrera, Réne-Vinicio Sánchez, Chuan Li, José Valente de Oliveira
{"title":"Deep Learning-Based Gear Pitting Severity Assessment Using Acoustic Emission, Vibration and Currents Signals","authors":"Rubén Medina, M. Cerrada, Diego Cabrera, Réne-Vinicio Sánchez, Chuan Li, José Valente de Oliveira","doi":"10.1109/PHM-Paris.2019.00042","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00042","url":null,"abstract":"A method for gearbox pitting faults severity classification using Deep Learning techniques is reported. The signals are preprocessed for obtaining a 2D time-frequency representation corresponding to the Mel Frequency Cepstral Coefficients. This bi-dimensional representation is the feature space used for classification. A Long Short Term Memory network (LSTM) is used for classifying nine levels of pitting in spur gears. Each signals dataset is used for training and validating a LSTM network. Classification accuracies up to 100 % are obtained during cross-validation with the analyzed signals dataset.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121069978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design Scheme of Fault Diagnosis System for Rollers of Coal Mills","authors":"Yu-wei Du","doi":"10.1109/PHM-Paris.2019.00028","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00028","url":null,"abstract":"In order to solve the problem to directly measure the wear of roller of HP coal mill in thermal power plant, this paper proposes a new design scheme of wear monitoring and diagnosis system for the rollers, based on the theory of mechanical vibration fault monitoring and diagnosis, combined with CAE simulation analysis technology. The framework of a fault diagnosis system is designed and constructed, and the reasoning mechanism of wear index is discussed.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122939677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Prognosis Methodology Based on Enhanced Lolimot Algorithm Using Historical Data","authors":"S. Razavi, T. A. Najafabadi, A. Mahmoodian","doi":"10.1109/PHM-Paris.2019.00014","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00014","url":null,"abstract":"Failure and breakdown in advanced machinery can be costly. One of the methods to avoid the failures is to use historical data. Using historical data enables us to predict faults and take necessary precautions to minimize the down-fall times of systems and therefore, optimize the overall performance. Predicting the remaining useful life (RUL) is one of the most convenient ways to assess the risk of system performance. LOLIMOT algorithm benefits from a neuro-fuzzy structure that enables it to provide more accurate RUL estimation results than traditional neural networks or SVMs. To further enhance the LOLIMOT algorithm performance, multiple degradation processes are considered in training the prediction module. In this paper, the enhanced LOLIMOT algorithm is used to perform the prognosis of gas turbine engines using only historical data. In the case study, the effectiveness of our proposed method is demonstrated. The results show that more accurate results can be achieved by using neuro-fuzzy structures in prognosis process.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123621683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Domain Adaptive Convolutional LSTM Model for Prognostic Remaining Useful Life Estimation Under Variant Conditions","authors":"Shuyang Yu, Zhenyu Wu, Xinning Zhu, M. Pecht","doi":"10.1109/PHM-Paris.2019.00030","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00030","url":null,"abstract":"In the age of industry 4.0 and smart manufacturing, a large volume of sensor data is produced from cyber-physical systems (CPS) and prediction of remaining useful life (RUL) of a machine or system becomes crucial for prognostics and health management (PHM). Several linear regression and deep learning models have been studied to extract features from segmented time windows and learn the degradation patterns. However, distributions of features are varying between source learning domain and target test domains, due to different working conditions and environments. Thus, the generalization of traditional methods will be influenced, which leads to performance degradation. This paper develops a domain adaptive CNN-LSTM (DACL) model to predict the RUL of a system based on the multi-dimensional sensor data. The DACL model combines the CNN and LSTM with domain adaptive transfer mechanism and takes the operating conditions into consideration. The features extracted by CNN of both source and target data are transformed to a higher dimensional space by reproducing kernel Hilbert space (RKHS) and the loss function is compensated by using maximum mean discrepancy (MMD) to reduce the distributions discrepancy. The model is evaluated on C-MAPSS dataset and demonstrate its performance improvement by comparing with previous methods.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hong-Mei Yan, H. Mu, X. Yi, Yuan-Yuan Yang, Guang-Liang Chen
{"title":"Fault Diagnosis of Rolling Bearing Based on WP Reconstructed Energy Entropy and PSO-LSSVM","authors":"Hong-Mei Yan, H. Mu, X. Yi, Yuan-Yuan Yang, Guang-Liang Chen","doi":"10.1109/PHM-Paris.2019.00011","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00011","url":null,"abstract":"A fault diagnosis method based on wavelet packet (WP) reconstruction of energy entropy, particle swarm optimization (PSO) and least squares support vector machine (LSSVM) is proposed for non-stationary vibration signals of rolling bearings. Firstly, the vibration signal is preprocessed, followed by 3-layer wavelet packet decomposition, and the energy entropy percentage of the reconstruction coefficient is extracted as the feature vector. Then, the 8-dimensional fault feature vector is reduced to a 2-dimensional feature vector by principal component analysis (PCA). Finally, the 2-dimensional feature vector is taken as the input sample of PSO-LSSVM. In order to diagnose the three fault states of the inner ring, the ball and the outer ring of the rolling bearing, four LSSVM classifiers are established. After the simulation analysis of the bearing vibration data, the diagnostic accuracy rate of the LSSVM multi-classifier group was 100%, which proves the feasibility and effectivity of the method.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117144941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Relationship between Individualism, Collectivism and Conflict Handling Styles of Healthcare Employees","authors":"Seb Aslan, Şerife Güzel, Demet Akarçay Ulutaş","doi":"10.1109/PHM-Paris.2019.00036","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00036","url":null,"abstract":"The objective of this study is to investigate the relationship between individualism, collectivism and conflict handling styles of healthcare employees. This study was conducted among 427 healthcare employees in twelve hospitals in Turkey by using survey method and simple random sampling. The scales of Conflict Handling Styles and Individualism and Collectivism (INDCOL) were performed within the study. The obtained data were analyzed with descriptive analysis, correlation, and confirmative factor analysis and regression analysis. As a result of the study, it was found that horizontal collectivism, vertical collectivism and horizontal individualism have impacted on compromising and integrating conflict handling styles and horizontal collectivism has influenced obliging integrating conflict handling styles also vertical individualism has influenced dominating and avoiding conflict handling styles significantly.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114196703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fault Diagnosis of Planetary Gearbox Based on Signal Denoising and Convolutional Neural Network","authors":"Guo-dong Sun, You-ren Wang, Can-fei Sun","doi":"10.1109/PHM-Paris.2019.00024","DOIUrl":"https://doi.org/10.1109/PHM-Paris.2019.00024","url":null,"abstract":"Planetary gearboxes are widely used in aerospace, marine and other important equipment for their unique advantages, and their health directly affects whether the equipment can work normally. The vibration signal generated when the fault occurs is extremely complicated, making it difficult to perform an effective diagnosis. In order to solve this problem, a planetary gearbox fault diagnosis method based on autocorrelation noise reduction combined with an improved convolutional neural network is proposed. The method firstly performs autocorrelation noise reduction on the fault signal. Secondly, the noise-reduced signal is used as the input of CNN for automatic feature extraction. The classifier is used to finally complete the intelligent diagnosis of the planetary gearbox.","PeriodicalId":119499,"journal":{"name":"2019 Prognostics and System Health Management Conference (PHM-Paris)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114875482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}