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Intelligent Fault Diagnosis and Prognosis in Electric Motors and Energy Storage Systems

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: 20 November 2025 | Viewed by 311

Special Issue Editor

School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea
Interests: applied dynamics; artificial intelligence toward prognostics and health management (PHM); Robotic condition monitoring, diagnostic and prognostic systems; sensors and measurements; modeling and characterization of degradation phenomena; application of interests: complex energy systems including li-ion battery cells and wind energy conversion systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The increasing adoption of electric motors and energy storage systems across industrial, transportation, and renewable energy sectors demands advanced techniques for ensuring their reliability and operational efficiency. This Special Issue aims to explore recent advancements in intelligent fault diagnosis and prognosis methods applied to these critical components. Emphasizing the integration of artificial intelligence (AI), machine learning (ML), signal processing, and digital twin technologies, the issue seeks to present cutting-edge research and practical applications that enable early fault detection, accurate fault classification, remaining useful life (RUL) estimation, and predictive maintenance strategies.

Topics of interest include, but are not limited to, the following:

  • AI/ML-based fault detection and diagnosis techniques;
  • Condition monitoring and data-driven health assessment;
  • Prognostic modeling for electric motors and batteries;
  • Hybrid approaches combining physics-based and data-driven methods;
  • Edge and cloud computing applications in real-time monitoring;
  • Sensor fusion and advanced signal processing for fault analysis;
  • Case studies and industrial applications.

This Special Issue aims to bring together researchers, engineers, and practitioners from academia and industry to foster cross-disciplinary collaboration and accelerate innovation in the intelligent maintenance of electric machines and energy storage systems. We look forward to receiving your contributions.

Dr. Ki-Yong Oh
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • fault diagnosis
  • prognostics
  • electric motors
  • energy storage systems
  • battery management systems
  • condition monitoring
  • predictive maintenance
  • remaining useful life (RUL)
  • machine learning
  • artificial intelligence
  • digital twin
  • data-driven methods
  • smart monitoring systems

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Published Papers (1 paper)

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Research

11 pages, 878 KB  
Article
Data-Driven Prediction of Kinematic Transmission Error and Tonal Noise Risk in EV Gearboxes Based on Manufacturing Tolerances
by Krisztian Horvath and Martin Kaszab
Appl. Sci. 2025, 15(19), 10460; https://doi.org/10.3390/app151910460 - 26 Sep 2025
Abstract
Although numerous studies have used ML to predict gear transmission error, few have provided a normalized, interpretable risk metric for early tolerance assessment. This work fills that gap by proposing the Tonal Risk Index (TRI). Kinematic Transmission Error (KTE) is a well-established primary [...] Read more.
Although numerous studies have used ML to predict gear transmission error, few have provided a normalized, interpretable risk metric for early tolerance assessment. This work fills that gap by proposing the Tonal Risk Index (TRI). Kinematic Transmission Error (KTE) is a well-established primary excitation source of tonal gear noise in electric vehicle drivetrains. This study introduces the TRI, a novel, dimensionless indicator that quantifies relative tonal noise risk directly from predicted KTE values. We employ a large-scale dataset of 39,984 Monte Carlo simulations comprising 15 manufacturing tolerance and process-shift variables, with KTE values as the target. Baseline linear regression failed to capture the strongly non-linear relationships between tolerances and KTE (R2 ≈ 0), whereas non-linear models—Random Forest and XGBoost—achieved high predictive accuracy (R2 ≈ 0.82). Feature importance analysis revealed that pitch error, radial run-out, and misalignment are consistently the most influential parameters, with notable interaction effects such as pitch error × run-out and misalignment × form-defect shift. The TRI normalises predicted KTE values to a 0–1 scale, enabling rapid comparison of tolerance configurations in terms of tonal excitation risk. This approach supports early-stage design decision-making, reduces reliance on high-fidelity simulations and physical prototypes, and aligns with sustainability objectives by lowering material usage and energy consumption. The results demonstrate that data-driven surrogate models, combined with the TRI metric, can effectively bridge the gap between manufacturing tolerances and NVH performance assessment. Full article
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