A comparative study of Naïve Bayes classifier and Bayes Net classifier for fault diagnosis of automobile hydraulic brake system

Abstract

In an automobile, brake system must be reliable and effective. Any failure in the braking system that impacts the ability to retard a vehicle's motion will have an immediate or frequent catastrophic effect on the safety of the vehicle. Thus, the role of brake systems is critical and condition monitoring is required. Particularly, vibration-based continuous monitoring and analysis using machine learning approaches are gaining momentum. This study is one such attempt to perform fault diagnosis of hydraulic brake system by vibration analysis. In this paper, the performance of Bayes net and Naive Bayes algorithms for fault diagnosis is presented. A hydraulic brake system test rig was fabricated. The vibration signals were acquired using a piezoelectric transducer. The statistical parameters are extracted and the good features that discriminate different faulty condition were identified. With selected features Naive Bayes and Bayes net algorithms were used for classification. The classification results of Naive Bayes algorithms and Bayes net algorithm for fault diagnosis of a hydraulic brake system were compared and the results were tabulated.