USE OF MACHINE-LEARNING TECHNIQUES BASED ON PYTHON LANGUAGE CODE TO CLASSIFY FAILURE DATA FROM THE BRAZILIAN AIR FORCE DATABASE

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Authors
de Almeida, Ygor H.
Subjects
machine learning
natural language processing
failure data
Advisors
Aros, Susan K.
Cherobini, Daniel, Brazilian Air Force
Date of Issue
2023-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
Like other major flight operators, the Brazilian Air Force (BrAF) must effectively manage multiple aircraft fleets, which are costly assets. The failure data collected from these assets is essential for decision-makers to assess the systems’ reliability, availability, and maintainability. Obtaining accurate and reliable information depends on the quality of failure data collected. BrAF engineers typically preprocess the data by classifying it as failure or non-failure for analysis, but this task is repetitive and time-consuming. Therefore, this study aims to develop and evaluate a machine-learning model capable of automatically performing this classification task. Of the six machine-learning techniques assessed, the Support Vector Classifier (SVC) model performed best in the F1-score metric. The results suggest that the SVC model has the potential to classify failure data from the BrAF database accurately, saving a significant amount of time. Additionally, the model could aid maintainers during the failure recording process, preventing them from inserting non-useful data in the database, and for inventory management of specific workshop repairs, thus providing more accurate information about the number of failures.
Type
Thesis
Description
Department
Department of Defense Management (DDM)
Organization
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Distribution Statement
Approved for public release. Distribution is unlimited.
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Copyright is reserved by the copyright owner.
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