The fast growth of industrial automation and the growing complexity of electrical machines have made it very important to have smart systems for monitoring, diagnosing problems, and predicting when maintenance will be needed. People have used traditional supervised machine learning methods a lot to look at operational data from electrical machines. This makes it possible to find faults and improve performance. But these methods need a lot of labelled data, which can be expensive, take a long time, and be hard to get in real-world industrial settings. On the other hand, a lot of operational data is still not labelled, not used enough, and could be useful for making strong predictive models. Semi-Supervised Machine Learning (SSML) solves this problem by using the best parts of both labelled and unlabelled data to make models more accurate, flexible, and able to apply to new situations. This study examines the incorporation of SSML into the oversight and upkeep of electrical machinery, with the objective of improving operational reliability, minimising unanticipated downtime, and optimising maintenance timetables. We look at important SSML algorithms, such as self-training, co-training, generative models, and graph-based methods. Self-training uses predictions that are very likely to be correct on data that isn't labelled to make the model better over time. Co-training, on the other hand, uses multiple complementary views of data to help the model learn from datasets that are only partially labelled. Generative models, like variational autoencoders and generative adversarial networks, make up plausible operational scenarios and add to training datasets. This helps with the lack of labelled fault data. Graph-based methods use the connections and similarities between machine data points to spread labels quickly and find complex operational dependencies. The research examines the practical implementation of these SSML methodologies for fault diagnosis, condition monitoring, and predictive maintenance of electrical machines. Through in-depth analysis, it shows how SSML can find small problems, spot possible failures before they get worse, and guess how much longer important parts will last. A comparative evaluation of the methods elucidates their distinct advantages and disadvantages, alongside their appropriateness for various operational scenarios. For example, self-training works well when there aren't many labelled examples but they are reliable. On the other hand, graph-based techniques work best when there are a lot of correlations between sensors. The research also looks at important problems that come up when using SSML in factories, like dealing with noisy and unbalanced data, choosing the best algorithm for a given machine condition, and combining real-time data streams with predictive models. There are ways to deal with these problems, such as data preprocessing techniques, confidence-based label propagation, and incremental model retraining. The study also stresses the need for scalable architectures and real-time processing capabilities to make sure that predictive insights are delivered quickly, which allows for proactive maintenance actions. The research not only looks at the methods used, but also gives a detailed framework that brings together sensor data collection, data preprocessing, SSML-based predictive modelling, and dashboard-based monitoring. This framework gives engineers and operators useful information about the health of machines, which helps them plan operations better, lower maintenance costs, and make machines last longer. The results show that SSML could be a good way to connect traditional supervised learning methods with real-world industrial needs. It is a cost-effective and efficient way to use both labelled and unlabelled data. Finally, the study talks about how SSML can be used in more general ways in industry. Companies can go from reactive maintenance to predictive and preventive strategies by combining advanced machine learning techniques with industrial operational workflows. This cuts down on downtime, makes things safer, and boosts overall productivity. The study finds that SSML is not only a useful tool for monitoring electrical machines, but it is also the basis for the future of smart, data-driven industrial systems. There are also chances for more progress in edge computing, real-time analytics, and the integration of explainable AI.
Dr.K.Rajashekar et al. (Wed,) studied this question.