Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Vibration monitoring"”.
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Fan blade damage detection using on-line vibration monitoring
Please read the abstract in the section 00front of this document
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In-Situ Defect Detection Using Acoustic Vibration Monitoring for Additive Manufacturing Processes
… often on micron scales.</p> <p>Through in-situ monitoring techniques, such as visual or acoustic monitoring, a secondary level of quality assessment can be performed. This type of real time monitoring solution can be used in a variety of ways to help reduce scrap rate, increase overall quality, …
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Non-intrusive vibration monitoring in US Naval and US Coast Guard ships
… and Electronic Systems proposed a new type of vibration monitoring system, entitled vibration assessment monitoring point with integrated recovery of energy or VAMPRIE, in their work entitled VAMPIRE: Accessing a Life-Blood of Information for Maintenance and Damage Assessment [1]. The proposed …
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Structural performance evaluation of concrete arch dams using ambient vibration monitoring and GNNS systems
… important. Methods used in the analysis of dam monitoring data include data-driven models, physical-based models and hybrid models. Data-driven models utilise environmental variables as independent factors and dam responses as dependent factors. The trends in the dam responses can be learnt for …
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Finite element model updating of concrete arch dams affected by alkali-silica reaction using ambient vibration monitoring and dam surveillance data
… dam surveillance program that includes ambient vibration monitoring is essential as it enables an in-depth understanding of the behaviour of a dam in operation. Additionally, structural behaviour analysis through numerical models such as finite element (FE) models, is a crucial aspect of dam …
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Planning for monitoring of probe hole drilling and pre-excavation grouting with measurement while drilling (MWD), vibration monitoring, and ground penetrating radar (GPR)
… practice, including: measurement while drilling, vibration monitoring, and borehole ground penetrating radar, with the goal of determining the locations of water bearing features ahead of the TBM and monitoring if grouting has sealed off or filled these features. Drill rig vibrations while …
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Vibratory response of stator cores of large induction motors operating in an offshore installation.
… and experimental investigations into the vibration behaviour of stator assemblies of induction motors. The aim is to evaluate the effectiveness of using the Finite Element Method to predict the natural frequencies, mode shapes and vibratory response of a large induction motor stator on an …
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Methodologies for remaining useful life estimation with multiple sensors in rotating machinery
… study expanded beyond the sheer application of vibration monitoring with the addition of an Oil Debris Monitoring probe (ODM) as well as Acoustic emission (AE). The method of AE monitoring is, once again, proposed as a robust technique for failure prognosis being better correlated with gear …
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Developing a calibrated low fidelity model and an optimized sensor network using LIVE Digital Twin for pipelines in oil and gas industries
… scheduling, manufacturing processes, health monitoring, etc. This communication is established with an optimized sensor network. LIVE Digital Twin (LIVE DT) is a novel methodology which addresses the lack of standardised DT solutions. This thesis employs LIVE DT to develop a calibrated Low …
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Non-linear Contact Analysis of Meshing Gears
… are considered one of the critical aspects of vibration analysis, and it contains various potential faults such as misalignment, cracks, and noise. Therefore, it requires vibration monitoring to ensure the system is operating properly. Case mounted accelerometers are frequently used to monitor …
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SensAnalysis: A Big Data Platform for Vibration-Sensor Data Analysis
… campus is the most instrumented building for vibration monitoring. It houses 225 hard-wired accelerometers which record vibrations arising due to internal as well as external activities. The recorded vibration data can be used to develop real-time applications for monitoring the health of the …
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Development of a vibration-powered impact recorder
… Often, this equipment is subjected to damaging vibrations. Given this, the army wants to be able to monitor the vibrations that are undergone by this equipment. Here, a battery-powered monitoring device would be undesirable because its batteries would need to be replaced. To solve this problem, …
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Machine learning techniques for the health monitoring of rotating machinery in nuclear power plants
… learning methods in application to the health monitoring of rotating plant items being used in the primary and secondary cycles of the Advanced Gas-cooled Reactor (AGR) nuclear power plants in the UK. The methods fall broadly into two categories: the statistical augmentation of a pre-existing …
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Vision-based robust structural dynamic monitoring and modal identification using stationary and drone-based imaging systems.
Structural health monitoring (SHM) plays a critical role in assessing and managing the condition of the civil infrastructure and prevents sudden closures or catastrophic failure of the structures by timely detection of ongoing degradations. Vision-based SHM has emerged as a promising non-contact …
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A review of vibration signal processing techniques for use in a real time condition monitoring system
The analysis of the vibrations produced by roller bearings is one of the most widely used techniques in condition determination of rolling element bearings. This project forms part of an overall plan to gain experience in condition monitoring and produce a computer aided vibration monitoring system …
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Vibration Analysis Processes In Noisy Environments For thePurposes of Condition Based Maintenance and theSignificance of Regime Recognition
… (AH-64) tail rotor drive train (TRDT) system's vibrations for the purpose of improving the Army's Condition Based Maintenance (CBM) program, a program established to monitor aircraft components via accelerometers in order to detect and diagnose failures. Since then, USC has constructed three …
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Innovative Plastic Optical Fiber Sensors
… of mechanical quantities such as displacement, vibration and acceleration. Also, it describes the realization of specific acquisition systems designed to interrogate the developed sensors. Since optical fibers have been historically associated with high speed telecommunication links because of …
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Data-Driven Modeling of Tracked Order Vibration in Turbofan Engine
… both offline and online for potential anomalies. Vibration monitoring in aircraft engines is traditionally performed using an order tracking methodology. Currently, there are no representative and efficient physics-based models with the adequate fidelity to perform vibration predictions in …
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Real-Time Spatial Monitoring of Vehicle Vibration Data as a Model for TeleGeoMonitoring Systems
… the development and proof of concept of a TeleGeoMonitoring (TGM) system for spatially monitoring and analyzing, in real-time, data derived from vehicle-mounted sensors. In response to the concern for vibration related injuries experienced by equipment operators in surface mining and construction …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. Presently, the well-established condition monitoring techniques are based on steady-state analysis of various …
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