Author
Kommu Tharun, V.Vijayalakshmi, Dr.S.Usharani
Keywords
Predictive Maintenance; Anomaly Detection; Autoencoder; Isolation Forest; Industrial IoT.
Abstract
The rapid advancement of industrial automation and the increasing deployment of sensor-based monitoring systems have enabled data-driven approaches for intelligent equipment maintenance. This paper presents SmartSense AI, an industrial predictive anomaly detection framework designed to identify abnormal patterns in machine sensor data using advanced machine learning techniques. Traditional maintenance strategies, including reactive and preventive maintenance, often fail to detect early-stage equipment degradation, leading to unexpected failures and increased operational costs. The proposed system utilizes unsupervised learning methods, specifically an autoencoder-based deep learning model and the Isolation Forest algorithm, to analyze multivariate time-series sensor data. The autoencoder learns the normal behavior of machine operations and identifies anomalies based on reconstruction error, while the Isolation Forest detects statistically isolated data points. A dual-model approach enhances detection reliability and reduces false positives. Additionally, the system incorporates a severity scoring mechanism to quantify anomaly intensity and a root cause analysis module to identify contributing sensor variables. An interactive Streamlit-based dashboard enables real-time visualization of anomaly detection results, severity levels, and sensor insights. The system is implemented using Python, TensorFlow, and Scikit-learn, ensuring scalability and efficiency. Experimental evaluation demonstrates that SmartSense AI effectively detects early anomalies, reducing unplanned downtime and maintenance costs. The modular architecture supports future enhancements such as IoT integration, cloud deployment, and predictive failure estimation.
References
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[2] Liu, F. T., Ting, K. M., Zhou, Z. H., “Isolation Forest,” IEEE International Conference on Data Mining, 2008, pp. 413–422.
[3] Sakurada, M., Yairi, T., “Anomaly Detection Using Autoencoders with Nonlinear Dimensionality Reduction,” MLSDA, 2014.
[4] Pang, G., Shen, C., Cao, L., Hengel, A., “Deep Learning for Anomaly Detection: A Review,” ACM Computing Surveys, 2021.
[5] Chalapathy, R., Chawla, S., “Deep Learning for Anomaly Detection: A Survey,” arXiv preprint, 2019.
[6] Breunig, M. M., Kriegel, H. P., Ng, R. T., Sander, J., “LOF: Identifying Density-Based Local Outliers,” SIGMOD, 2000.
[7] Schölkopf, B., Platt, J., Shawe-Taylor, J., Smola, A., Williamson, R., “Estimating the Support of a High-Dimensional Distribution,” Neural Computation, 2001.
[8] An, J., Cho, S., “Variational Autoencoder Based Anomaly Detection,” Special Lecture on IE, 2015.
[9] Goodfellow, I., et al., “Generative Adversarial Nets,” NIPS, 2014.
[10] Carvalho, T. P., et al., “A Systematic Literature Review of Machine Learning Methods Applied to Predictive Maintenance,” Computers & Industrial Engineering, 2019.
[11] Khan, S., Yairi, T., “A Review on the Application of Deep Learning in System Health Management,” Mechanical Systems and Signal Processing, 2018.
[12] Ahmad, S., Lavin, A., Purdy, S., Agha, Z., “Unsupervised Real-Time Anomaly Detection for Streaming Data,” Neurocomputing, 2017.
Received : 15 April 2026
Accepted : 25 June 2026
Published : 29 June 2026
DOI: 10.30726/esij/v13.i2.2026.1320031