Browsing Publikasjoner fra CRIStin - NTNU by Title
Now showing items 13253-13272 of 37219
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Fault detection and classification in oil wells and production/service lines using random forest
(Peer reviewed; Journal article, 2020)This papers deals with the automatic detection and classification of faulty events during the practical operation of oil and gas wells and lines. The events considered here are part of the publicly available 3W database ... -
Fault detection and diagnosis of a blade pitch system in a floating wind turbine based on Kalman filters and artificial neural networks
(Peer reviewed; Journal article, 2021)This paper describes the development of a fault detection and diagnosis method to automatically identify different fault conditions of a hydraulic blade pitch system in a spar-type floating wind turbine. For fault detection, ... -
Fault Detection and Prediction in Smart Grids
(Chapter, 2018)Modern society is to a larger and larger extent dependant on electric energy, and hence the reliance on and utilization of the electric grid is increasing steadily. At the same time the production and consumption patterns ... -
Fault detection in glucose control: Is it time to move beyond CGM data?
(Journal article; Peer reviewed, 2018)People with diabetes mellitus type 1 could benefit from fully automated systems for glucose control. However, faults in any component of the system can severely compromise the safety of the user. An increasing degree of ... -
Fault detection of offshore wind turbine drivetrains in different environmental conditions through optimal selection of vibration measurements
(Peer reviewed; Journal article, 2023)In this study, a vibration-based fault detection method is proposed for offshore wind turbine drivetrain based on the optimal selection of the acceleration measurements. The main aim is to find the sensor positions mounted ... -
Fault Detection with LSTM-Based Variational Autoencoder for Maritime Components
(Journal article; Peer reviewed, 2021)Maintenance routines on ships today follow either a reactive maintenance (RM) or preventive maintenance (PvM) approach. RM can be regarded as post-failure repair, which might create large costs. PvM uses predetermined ... -
Fault Detection, Localization and Clearance for MMC based on Indirect Finite Control Set Model Predictive Control
(Chapter, 2023)In this paper, indirect finite control set model predictive control (I-FCS-MPC) is used for detecting, localizing, and tolerating open-circuit failures in the transistors without the use of arm voltage sensors. The fault ... -
Fault diagnosis of downhole drilling incidents using adaptive observers and statistical change detection
(Journal article; Peer reviewed, 2015)Downhole abnormal incidents during oil and gas drilling cause costly delays, and may also potentially lead to dangerous scenarios. Different incidents will cause changes to different parts of the physics of the process. ... -
Fault growth and orthogonal shortening in transtensional supradetachment basins: Insights from the `Old Red´ of western Norway
(Journal article; Peer reviewed, 2023)For basins that evolve adjacent to large-magnitude normal faults, tectonic controls on sedimentation involve isostatic back rotation of an exhuming footwall and, commonly, the evolution of kilometre-scale extension-parallel ... -
Fault Monitoring and Fault Recovery Control for Position-Moored Vessels
(Journal article; Peer reviewed, 2011)This paper addresses fault-tolerant control for position mooring of a shuttle or floating production storage and offloading vessels. A complete framework for fault diagnosis is presented. A loss of a sub-sea mooring line ... -
Fault Prognostics Using LSTM Networks: Application to Marine Diesel Engine
(Peer reviewed; Journal article, 2021)Maintenance is the key to ensuring the safe and efficient operation of marine vessels. Currently, reactive maintenance and preventive maintenance are two main approaches used onboard. These approaches are either cost-intensive ... -
Fault tolerant control of a proton exchange membrane fuel cell using Takagi–Sugeno virtual actuators
(Journal article, 2016)In this paper, a fault tolerant control (FTC) strategy for proton exchange membrane (PEM) fuel cells based on the use of virtual actuators and the Takagi–Sugeno (TS) approach is proposed. The overall solution relies on ... -
Fault tolerant control of uncertain dynamical systems using interval virtual actuators
(Journal article; Peer reviewed, 2017)In this paper, a model reference fault tolerant control strategy based on a reconfiguration of the reference model, with the addition of a virtual actuator block, is presented for uncertain systems affected by disturbances ... -
Fault-tolerant control allocation for overactuated nonlinear systems
(Journal article; Peer reviewed, 2017)This paper addresses the problem of fault-tolerant control allocation for input affine nonlinear systems. The proposed scheme is divided in three main tasks: fault detection and estimation using a nonlinear observer, fault ... -
Fault-tolerant control allocation: an Unknown Input Observer based approach with constrained output fault directions
(Journal article; Peer reviewed, 2013)This paper focuses on the use of unknown input observers for detection and isolation of actuator and effector faults with control reconfiguration in overactuated systems. The control allocation actively uses input redundancy ... -
Fault-tolerant input allocation with actuator dynamics: finite-time control reconfiguration
(Journal article, 2014)This paper focuses on fault tolerant control allocation for overactuated systems with actuator dynamics. The proposed scheme for fault detection and isolation is based on unknown input observers and the main contribution ... -
Fault-tolerant Position-Mooring Control for Offshore Vessels
(Journal article; Peer reviewed, 2018)Fault-tolerance is crucial to maintain safety in offshore operations. The objective of this paper is to show how systematic analysis and design of fault-tolerance is conducted for a complex automation system, exemplified ... -
A faunistic study of water mites (Hydrachnidia and Halacaridae) from southern Norway
(Journal article, 2022)Targeted sampling of a broad range of freshwater habitats over the past five years, combined with screening of recent records available in online databases, substantially increased the number of water mite species known ... -
Favorable effects on arterial stiffness after renal sympathetic denervation for the treatment of resistant hypertension: a cardiovascular magnetic resonance study
(Peer reviewed; Journal article, 2016)Aims: Renal sympathetic denervation (RDN) has recently been suggested to be a novel treatment strategy for patients with treatment-resistant hypertension. However, the latest randomized studies have provided conflicting ...