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A Monitoring System for On-line Control of Selective Laser MeltingA Monitoring System for On-line Control of Selective Laser Melting (Eenmonitoring systeem voor on-line controle van Selectief Laser Smelten) KU Leuven

Selective Laser Melting (SLM) is an Additive Manufacturing (AM) processwhich allows to produce complex metallic parts in a layer by layer fashion.The use of SLM is advantageous in industries as for instance aerospace or medical industries, since SLM allows a larger design freedom than possible with conventional material removal processes such as milling, cutting or drilling. For medical industries SLM is advantageous to produce custom designed ...

Parametric Frequency Domain Identification of a Time-Varying System as a Time-dependent Weighted Sum of Time-Invariant Systems Vrije Universiteit Brussel

John Lataire, Rik Pintelon
A frequency domain, parametric identification procedure for single-input, single output time-varying systems is presented. The output of the model is built as a time-varying weighted sum of the responses of linear time-invariant systems. A judicious choice of the weighting functions is shown to provide an intuitive insight into the evolution of the instantaneous transfer function with time. Results of previous work are used to obtain ...

Fast Active Balancing System using Multi-level DC Converter for Efficient AC-coupled Battery Systems in Stationary Applications Vrije Universiteit Brussel

Abdul Mannan Rauf, Mohamed Abdel Monem, Thomas Geury, Mohamed El Baghdadi, Omar Hegazy

This paper proposes a cascaded half-bridge multilevel converter (MLC) topology for stationary battery energy storage systems (BESSs). Commonly, many low-voltage battery modules are connected in series to create the DC-link of the inverter. Due to difference in electrochemical characteristics, voltage imbalance happens among different modules during the charge-discharge operation, which negatively affects the lifetime of the battery pack. The ...

Experimental driven demystification of system identification for nonlinear mechanical systems Vrije Universiteit Brussel

Mark Vaes, Joannes Schoukens, Yves Rolain, Johan Pattyn
The goal here is to develop a low cost hardware-based demonstrator for system identification (SI) methods that can be used in a self-paced training kit by students as well as practicing engineers. The focus lies on hands-on training with a high return on effort. It starts from experiments that are performed on the demonstrator, a real system that can easily be used at home by the trainee without the need for external support or expensive ...

Cost effective LED-based multi-spot projection system for medical 3D volume measurement systems Vrije Universiteit Brussel

Thomas Kampfe, Shamus Husheer, Michael Vervaeke, Mathias Heckele, Isabelle Verrier, Yves Jourlin

This paper presents a multi spot projection unit, used in a 3D volume measurement system employed in a heart failure monitoring device, observing the volume of a patient's feet for symptoms of heart problems (peripheral edema-swelling of the extremities). The stereoscopic image acquisition requires a surface with enough optically detectable texture, usually not present on human skin, which can be resolved by projecting an infrared, static ...

An Online Framework for State of Charge Determination of Battery Systems using Combined System Identification Approach Vrije Universiteit Brussel

Mohammad Khan, Joeri Van Mierlo, Grietus Mulder, Filip Leemans
State of Charge (SoC) of a battery is a measure of the amount of electrical energy stored in the battery. The prerequisite for state of charge determination in Electrical Vehicle (EV) and stationary batteries is more challenging as the battery can be composed of hundreds of cells while load current changes dramatically inside the cells and required elapsed time for SoC determination should be as short as possible for battery pack management to ...

Exploring the health system for sustainable and integrated acute malnutrition services applying a systems lens : the case of Afghanistan Universiteit Gent

Shafiqullah Safi, Ahmad Nawid Qarizada, Hedwig Deconinck
Introduction: Afghanistan has an estimated annual burden of severe acute malnutrition in children under five of over 600,000, with less then 30% accessing care. Since 2009, acute malnutrition has been part of the country’s Basic Package of Health Services, which is outsourced for implementation to local partners and regulated by the Ministry of Public Health. A gradual transition to government implementation is expected to change the dynamics of ...

Optimization of a wind and PV Hybrid power system using Energy Storage Systems Vrije Universiteit Brussel

Imane Worighi, Abdelilah Maach
Renewable Energy Sources (RESs) are playing an important role in reducing carbon emissions of conventional fossil fuel, greenhouse gases and other pollutants. Moreover, they have a potential benefit of reducing energy cost and providing power to meet the energy demand. Nevertheless, grid stability is criticized via intermittent and non-controllable behavior of RESs. In this regards, coupling power generation units such as solar and wind with ...