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Nonlinear Model-Based Fault Detection for Industrial Applications

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Fault Diagnosis & Sensors".

Deadline for manuscript submissions: closed (10 May 2023) | Viewed by 3336

Special Issue Editors


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Guest Editor
Automation Department, University of Luxembourg, 4365 Esch-sur-Alzette, Luxembourg
Interests: fault detection; fault tolerant control; wind turbines
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Engineering, University of Ferrara, 44122 Ferrara, Italy
Interests: system identification and data analysis; artificial intelligence; neural networks; fuzzy systems; fault diagnosis; fault tolerant control; aircraft and spacecraft systems; energy conversion systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Motivated by the need for reliable and safe modern industrial systems, Fault Detection and Isolation (FDI) schemes are the most sought-after solutions in the last two decades. FDI schemes can help with timely detection, identification, and isolation of any faults. Then, corresponding corrective measures can be taken. Moreover, FDI information can be used to optimize the maintenance procedures and reduce the operational cost.

As a standard definition, deviation from the normal or standard condition of any parameter of the system can be translated as a fault, categorized as actuator faults, sensor faults, and plant faults. The concept of redundancy is often used to construct FDI schemes, amongst these, the model-based FDI has received a great deal of attention, since it can be specifically designed for the system of interest and the fault could be directly detected and isolated. Moreover, it resolves the problems associated with hardware redundancy approaches.

However, model-based FDI approaches have been mostly designed for the simple or linearized model of systems. This also requires the accurate knowledge of system dynamics. Moreover, the inevitable sources of unknown nonlinearities, model uncertainties, exogenous disturbances, and inadequate measurable outputs make the FDI design for industrial systems challenging.

This motivates the aim of this Special Issue of Sensors. Accordingly, I cordially invite researchers to contribute original and unique articles, as well as review papers. The topics of interest include (with emphasis on practical industrial systems), but are not limited to:

  • Condition monitoring;
  • Fault detection and isolation;
  • Data-driven approaches including machine learning methods;
  • Fault detection and diagnosis;
  • Incipient faults;
  • Industrial systems;
  • Model-based approaches;
  • Nonlinear models;
  • Observer design;
  • Unknown inputs.

Dr. Hamed Habibi
Dr. Silvio Simani
Guest Editors

Manuscript Submission Information

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Published Papers (2 papers)

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16 pages, 4968 KiB  
Article
Roll Eccentricity Detection and Application Based on SFT and Regional DFT
by Kexin Yang, Gang Zheng and Zhe Yang
Sensors 2023, 23(16), 7157; https://doi.org/10.3390/s23167157 - 14 Aug 2023
Viewed by 1035
Abstract
Roll eccentricity disturbance is a high-frequency periodic change signal caused by the irregular shape of the roll and roll bearing, which is difficult to identify and affects the periodic deviation of the exit thickness of the strip. To achieve rapid identification of the [...] Read more.
Roll eccentricity disturbance is a high-frequency periodic change signal caused by the irregular shape of the roll and roll bearing, which is difficult to identify and affects the periodic deviation of the exit thickness of the strip. To achieve rapid identification of the source and a mathematical model of roll eccentricity signals, a sparse Fourier transform (SFT) and regional DFT method for roll eccentricity signal recognition and detection was proposed. This method utilizes SFT to calculate the signal FFT more quickly based on the sparsity of the signal frequency domain. Under the premise of knowing the roll diameter, the signal frequency spectrum is identified online, the amplitude and phase are identified through regional DFT, and the eccentricity disturbance is compensated on site. The simulation results show that this method can accurately identify the source of roll disturbance, quickly update and replace the problematic rolls, and improve the online recognition efficiency by more than 3000 times. This method has good results in online detection and recognition of roll eccentricity signals, greatly improving engineering application efficiency, and ultimately achieving the goal of improving the accuracy of strip outlet thickness. Full article
(This article belongs to the Special Issue Nonlinear Model-Based Fault Detection for Industrial Applications)
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18 pages, 6456 KiB  
Article
A Fast Loss Model for Cascode GaN-FETs and Real-Time Degradation-Sensitive Control of Solid-State Transformers
by Moinul Shahidul Haque, Md Moniruzzaman, Seungdeog Choi, Sangshin Kwak, Ahmed H. Okilly and Jeihoon Baek
Sensors 2023, 23(9), 4395; https://doi.org/10.3390/s23094395 - 29 Apr 2023
Cited by 2 | Viewed by 1715
Abstract
This paper proposes a novel, degradation-sensitive, adaptive SST controller for cascode GaN-FETs. Unlike in traditional transformers, a semiconductor switch’s degradation and failure can compromise its robustness and integrity. It is vital to continuously monitor a switch’s health condition to adapt it to mission-critical [...] Read more.
This paper proposes a novel, degradation-sensitive, adaptive SST controller for cascode GaN-FETs. Unlike in traditional transformers, a semiconductor switch’s degradation and failure can compromise its robustness and integrity. It is vital to continuously monitor a switch’s health condition to adapt it to mission-critical applications. The current state-of-the-art degradation monitoring methods for power electronics systems are computationally intensive, have limited capacity to accurately identify the severity of degradation, and can be challenging to implement in real time. These methods primarily focus on conducting accelerated life testing (ALT) of individual switches and are not typically implemented for online monitoring. The proposed controller uses accelerated life testing (ALT)-based switch degradation mapping for degradation severity assessment. This controller intelligently derates the SST to (1) ensure robust operation over the SST’s lifetime and (2) achieve the optimal degradation-sensitive function. Additionally, a fast behavioral switch loss model for cascode GaN-FETs is used. This proposed fast model estimates the loss accurately without proprietary switch parasitic information. Finally, the proposed method is experimentally validated using a 5 kW cascode GaN-FET-based SST platform. Full article
(This article belongs to the Special Issue Nonlinear Model-Based Fault Detection for Industrial Applications)
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