Explanipedia

Expanding Single Frequency Excitations to PiecewiseBandwidth Excitations for Low Speed Cameras Vision-basedvibration Measurements Open

Davide Mastrodicasa, Andrea Sabatini, Emilio Di Lorenzo, Bart Peeters, Patrick Guillaume · 2025

FPGA real-time melt-pool temperature control in Directed Energy Deposition Open

Jorge Sanchez-Medina, Zoé Jardon, Charles Snyers, Michaël Hinderdael, Patrick Guillaume , et al. · 2024

Experimental identification of process dynamics for real-time control of Directed Energy Deposition Open

Julien Ertveldt, Jorge Sanchez-Medina, Zoé Jardon, Michaël Hinderdael, Patrick Guillaume · 2022

Real-time control of melt pool temperature, deposition width, and height has shown to deliver significant improvements in both material properties and part geometry during the laser based directed energy deposition process. For accurate co…

Structural health monitoring through surface acoustic wave inspection deployed on capillaries embedded in additively manufactured components Open

Michaël Hinderdael, Zoé Jardon, Julien Ertveldt, Patrick Guillaume · 2021

Surface Acoustic Wave inspection is a well-known non-destructive testing technique that receives considerable attention to become implemented as a Structural Health Monitoring system. The current work presents a novel approach to embed Sur…

Production Assessment of Hybrid Directed Energy Deposition Manufactured Sample with Integrated Effective Structural Health Monitoring channel (eSHM) Open

Zoé Jardon, Michaël Hinderdael, Julien Ertveldt, Patrick Guillaume · 2021

Additively manufactured components are questioned for their fatigue performance and therefore not adopted for safety critical applications so far. The components might contain material imperfections and residual stresses due to the high te…

Let’s Make Ball Balancing Great Again: Why You Should Use Temporary Speed Reduction Open

Gabriël Van De Velde, Björn Verrelst, Dirk Lefeber, Patrick Guillaume · 2020

Automatic ball balancing is a technique adopted in rotordynamics to reduce unknown rotor unbalance automatically. This technique sounds appealing as it can ease a panoply of balancing issues considerably. The presence of stiction, however,…

Gaining Insights in Loading Events for Wind Turbine Drivetrain Prognostics Open

Pieter-Jan Daems, Yi Guo, Shuangwen Sheng, Cédric Peeters, Patrick Guillaume , et al. · 2020

Wind energy is one of the largest sources of renewable energy in the world. To further reduce the operations and maintenance (O&M) costs of wind farms, it is essential to be able to accurately pinpoint the root causes of different failure …

Reducing the statistical scatter of automatic ball balancers using temporary speed reduction Open

Gabriël Van De Velde, Hans Meeus, Björn Verrelst, Dirk Lefeber, Patrick Guillaume · 2020

For as long as Automatic Ball Balancers are used as a means to automatically reduce unbalance in rotating machinery, it is known that these are prone to some statistical scatter in their balancing behaviour due to stiction. This diffusion …

A proof-of-concept analysis relating dimensions of a melt pool to its vibrational behavior to control a laser-based additive manufacturing process Open

Galid Arroud, Julien Ertveldt, Patrick Guillaume · 2020

The formation of a melt pool, during an additive manufacturing process, is a complex multi-physical process. Apparent factors, contributing to its complexity, are among others: the high temperatures, the existence of the material in multip…

Spatial distributed spectroscopic monitoring of melt pool and vapor plume during the laser metal deposition process Open

Dieter De Baere, Wim Devesse, Jan Helsen, Patrick Guillaume · 2020

Laser metal deposition is an additive manufacturing process that allows the production of near net shape structures. In order to obtain structures with reproducible and excellent material properties, it is necessary to understand the behav…

Offline powder-gas nozzle jet characterization for coaxial laser-based Directed Energy Deposition Open

Zoé Jardon, Patrick Guillaume, Julien Ertveldt, Michaël Hinderdael, Galid Arroud · 2020

One of the major challenges faced by laser-based Directed Energy Deposition (DED) is the process efficiency. This efficiency is significantly affected by the percentage of blown powder that effectively reaches the spherical metal melt pool…

MiCLAD as a platform for real-time monitoring and machine learning in laser metal deposition Open

Julien Ertveldt, Patrick Guillaume, Jan Helsen · 2020

The MiCLAD machine designed at the VUB, Belgium, allows for closed-loop controlled laser metal deposition including various in-situ optical based measurement systems. These integrated sensors collect information on deposition geometry and …

Comparison of visual and hyperspectral monitoring of the melt pool during Laser Metal Deposition Open

Jorge Sanchez-Medina, Wim Devesse, Julien Ertveldt, Patrick Guillaume · 2020

In the field of additive manufacturing the implementation of real time process monitoring is required to enhance the quality and repeatability of the printed parts. Laser metal deposition (LMD) is a technique where the deposition of materi…

Analyses of drives power reduction techniques for multi-axis random vibration control tests Open

Giacomo D’Elia, Umberto Musella, Emiliano Mucchi, Patrick Guillaume, Bart Peeters · 2019

In multi-axis vibration control testing, the power required by the excitation system for replicating the user defined test specifications is a limiting factor which cannot be overlooked. Excessive power, on top of over-stressing the often …

On the Influence of Capillary-Based Structural Health Monitoring on Fatigue Crack Initiation and Propagation in Straight Lugs Open

Marc Moonens, Eric Wyart, Dieter De Baere, Michaël Hinderdael, Julien Ertveldt , et al. · 2019

This paper addresses the influence on the fatigue life induced by the implementation of a capillary-based structural health monitoring methodology, patented under the name eSHM. It consists in integrating structurally small and pressurized…

Identification of Noise, Vibration and Harshness Behavior of Wind Turbine Drivetrain under Different Operating Conditions Open

Nicoletta Gioia, Cédric Peeters, Patrick Guillaume, Jan Helsen · 2019

Noise, vibration and harshness (NVH) problems are critical issues to be tackled for wind turbine drivetrains. Tracking the behavior of modal parameters of the machines’ fundamental modes during operation it is of high interest to validate …

Fatigue failure monitoring of 316L stainless steel coupons using optical fibre based distributed strain sensing Open

Ben De Pauw, Michaël Hinderdael, Marc Moonens, Dieter De Baere, Thomas Geernaert , et al. · 2019

We demonstrate the application of optical frequency domain reflectometry to detect, locate and track the propagation of fatigue cracks in simple beam-shaped stainless-steel specimens. To do so we recorded the strain distribution along the …

Development of a steepest-descent control solution for Multi-Input Multi-Output swept sine testing in avirtual shaker environment Open

Umberto Musella, S. Waimer, Bart Peeters, Francesco Marulo, Patrick Guillaume · 2019

Multiple-Input Multiple-Output (MIMO) sine sweep is nowadays acknowledged to be one of the best excitation techniques for the modal testing of large aerospace structures, being an optimal solution in the tradeoff between high-quality FRFs …

Analytical Modeling of Embedded Load Sensing Using Liquid-Filled Capillaries Integrated by Metal Additive Manufacturing Open

Michaël Hinderdael, Marc Moonens, Julien Ertveldt, Dieter De Baere, Patrick Guillaume · 2019

Additive manufacturing (AM) offers new manufacturing solutions for the integration of smart functionalities in engineering structures. In this paper, an analytical model is presented for an embedded load sensing element based on a liquid-f…

On the Nature of Pressure Wave Propagation through Ducts for Structural Health Monitoring Application Open

Zoé Jardon, Michaël Hinderdael, Tamás Régert, Jeroen van Beeck, Patrick Guillaume · 2019

An effective structural health monitoring system fully exploits the flexibility offered by the 3D printing process by integrating a smart structural health monitoring technology inside the 3D-printed components. The system relies on the pr…

Dynamic Performance of a Squeeze Film Damper with a Cylindrical Roller Bearing under a Large Static Radial Loading Range Open

Hans Meeus, Jakob Fiszer, Gabriël Van De Velde, Björn Verrelst, Wim Desmet , et al. · 2019

Turbomachine rotors, supported by little damped rolling element bearings, are generally sensitive to unbalance excitation. Accordingly, most machines incorporate squeeze film damper technology to dissipate mechanical energy caused by rotor…

Directional and oscillating residual stress on the mesoscale in additively manufactured Ti-6Al-4V Open

Maria Strantza, Bey Vrancken, Michael B. Prime, C. E. Truman, Marleen Rombouts , et al. · 2019

Dynamic Performance of an Oil Starved Squeeze Film Damper Combined With a Cylindrical Roller Bearing Open

Hans Meeus, Jakob Fiszer, Gabriël Van De Velde, Björn Verrelst, Dirk Lefeber , et al. · 2019

Squeeze film dampers (SFDs) are widely used to dissipate mechanical energy caused by rotor vibrations as well as to improve overall stability of the rotor system. Especially turbomachine rotors, supported on little damped rolling element b…

Hyperspectral and thermal temperature estimation during laser cladding Open

Margot Lison, Wim Devesse, Dieter De Baere, Michaël Hinderdael, Patrick Guillaume · 2018

Although there is no doubt about the tremendous industrial potential of metal additive manufacturing techniques such as laser metal deposition, the technology still has some intrinsic quality challenges to overcome before reaching its indu…

Experimental Study of the Shaft Penetration Factor on the Torsional Dynamic Response of a Drive Train Open

Hans Meeus, Björn Verrelst, David Moens, Patrick Guillaume, Dirk Lefeber · 2018

Typical rotating machinery drive trains are prone to torsional vibrations. Especially those drive trains that comprise one or more couplings which connect the multiple shafts. Since these vibrations rarely produce noise or vibration of the…

Additive Manufactured Metallic Smart Structures to Monitor the Mechanical Behavior In Situ Open

Dieter De Baere, Michaël Hinderdael, Marc Moonens, Zoé Jardon, Margot Lison , et al. · 2018

Additive manufacturing (AM) has proven in a number of demonstrators its tremendous potential for structural components. AM has gone beyond being a prototyping process and is now firmly being explored as production process in numerous domai…

Fatigue Performance of Powder Bed Fused Ti-6Al-4V Component with Integrated Chemically Etched Capillary for Structural Health Monitoring Application Open

Michaël Hinderdael, Dieter De Baere, Patrick Guillaume · 2018

Fatigue performance of additively manufactured (AM) components is still uncertain and inconsistent. Structural health monitoring (SHM) systems offer a solution to continuously monitor the structural integrity of a structure. The effective …

Efficient Use of the Output Information to Improve Modal Parameter Estimation Open

Oscar Olarte, Mahmoud El‐Kafafy, Patrick Guillaume · 2018

In modal identification, the value of the model parameters and the associated uncertainty depends on the quality of the measurements. The maximum likelihood estimator (mle) is a consistent and efficient estimator. This means that the value…

On the Influence of Experimental Parameters on the Consistency of the LDR-Based Defect Detection Approach Applied to Composite Material Structures Open

Galid Arroud, Mahmoud El‐Kafafy, Patrick Guillaume · 2018

The Local Defect Resonance (LDR) approach is a technique which is used to detect and localize defects in structural components in a non-invasive way. In this contribution, we will assess whether the local resonance frequencies changes by a…

Long term operational modal analysis for rotating machines Open

Nicoletta Gioia, Pieter-Jan Daems, Patrick Guillaume, Jan Helsen · 2018

Wind energy is one of the most promising renewable energy available today. The continuous demand of wind energy production led the interest of the wind industry towards bigger turbines. This upscaling trend has imposed bigger (not quasi-st…

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