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Abstract: Human–robot collaborative systems bring several benefits in using human and robot capabilities simultaneously. One of the critical questions is the impact of these systems on production process efficiency. The search for high-level efficiency is severely dependent on collaborative robot characteristics and motion parameters, and the ability of humans to adjust to changing circumstances. Therefore, our research analyzes the effect of the changing collaborative robot motion parameters, acoustic parameters and visual factors in a specific assembly operation, where efficiency is measured through operation times. To conduct our study, we designed a digital twin-based model and a laboratory environment experiment in the form of a collaborative workplace. The results show that changing the motion, acoustic and visual parameters of the collaborative workplace impact the assembly process efficiency significantly.
Keywords: collaborative robot, collaborative workplace, digital twin, assembly operation, efficiency
Published in DKUM: 26.02.2024; Views: 301; Downloads: 15
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Abstract: The ATHENA European University is an alliance of nine Higher Education Institutions with the mission of fostering excellence in research and innovation by facilitating international cooperation. The ATHENA acronym stands for Advanced Technologies in Higher Education Alliance. The partner institutions are from France, Germany, Greece, Italy, Lithuania, Portugal, and Slovenia: the University of Orléans, the University of Siegen, the Hellenic Mediterranean University, the Niccolò Cusano University, the Vilnius Gediminas Technical University, the Polytechnic Institute of Porto, and the University of Maribor. In 2022, two institutions joined the alliance: Maria Curie-Skłodowska University from Poland and University of Vigo from Spain. Also in 2022, an institution from Austria joined the alliance as an associate member: Carinthia University of Applied Sciences. This research book presents a selection of the ATHENA university partners' research activities. It incorporates an overview of the research activities of each member, a selection of the most relevant bibliographic works of the members, peer-reviewed student papers, a descriptive list of the ATHENA Talks and reports from the individual work packages of the ATHENA project. The ATHENA Research Book provides a platform that promotes joint and interdisciplinary research projects of both advanced and early-career researchers.
Keywords: ATHENA European Univerity, Erasmus, reasearch, interdisciplinarity, co-operation
Published in DKUM: 13.09.2023; Views: 456; Downloads: 47
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Abstract: Distribution Networks (DNs) are evolving from a once passive to an active part of the electricity network. This evolution is driven by the current political and environmental decisions, Directives and Incentives, as well as the technological development, observed in the everincreasing integration of renewable energy resources, advanced network control and measurement devices, the upcoming energy exibility market, etc. This Doctoral Thesis deals with the problem of optimization of the technical aspects of a DN operation, enabled by the proliferated integration of the photovoltaic systems (PV) and other active devices. The main objective of the Thesis is the optimization of a DN operation in terms of minimization of electrical energy losses while ensuring the proper voltage profiles and preventing thermal overloadingof lines. Therefore, three Differential Evolution-based optimization procedures were developed and tested on real medium and low voltage DNs. The first methodology determines the optimal rooftop surfaces for the installation of PV systems, yielding minimum annual energy losses. It is based on the simultaneous consideration of high-resolution spatio-temporal solar and PV potential data, as well as long-term measured profiles of consumption and generation of electrical energy within the network of a given configuration. The second algorithm minimizes network losses in a time-discrete operation point, by determining the optimal operation of the following active elements: PV systems capable of cooperation in reactive power provision, On-Load Tap Changer equipped transformer substations and remotely controlled switches for network reconfiguration. The final algorithm was developed by a proper consolidation of the first two approaches, yielding the synergistic effects expressed as the increase of loss reduction and network exibility. The results of the performed case studies show that the locations of the highest suitability for PV installation with respect to the solar energy availability, are not necessarily the best choice from the network operation standpoint. Therefore, both standpoints should be considered simultaneously when choosing the rooftop surfaces for PV installation. Furthermore, by determining optimal hourly operation of the considered active elements, not only the additional reduction of annual network losses was achieved, but also increased accommodation of the PV systems that doesn't violate operation constraints.
Keywords: distribution network, optimization of operation, active network elements, PV system placement, minimization of losses
Published in DKUM: 11.06.2020; Views: 1867; Downloads: 424
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Abstract: We describe an example of partnership between a university and some major IT companies - IBM and Microsoft - to teach a course on information systems technology. The course is taught in the fifth (final) year of the university undergraduate program when students have already mastered the basic theoretical knowledge of information system development. For this reason, the course content was restructured to pay more attention to practical experience and the learning opportunities available within the environment of professional industry. During the course, students get acquainted with IBM and Microsoft products and the tools that support the development of online information systems. Special attention is devoted to group project work, which is not just intended for the improvement of technical skills, but also for the aqusition of transferrable skills such as teamwork, management/leadership, planning and organizing, presentation and documentation, searching for information, etc. We describe our experience from teaching the course in the academic years 2005/06 and 2006/07. A description of the course content is given and the results of a survey among the students are presented. Students responded favourably to the new approach and found the course very useful and interesting.
Keywords: computer engineering education, university-industry co-operation, group project work, information systems technology
Published in DKUM: 22.01.2018; Views: 1136; Downloads: 397
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Abstract: V diplomskem delu smo pregledali vpeljavo orodij za upravljanje informacijskih storitev. Osredotočili smo se na standarde, metodologije, smernice pri upravljanju poslovnih procesov. Znotraj tega smo opredelili ključne pojme, pregledali zgodovino, tehnološko zasnovo, predstavili COBIT okvir in ITIL knjižnice, ki sta najbolj v rabi. V nadaljevanju smo pregledali operacijske upravnike, njihov namen, zasnovo, nadzorne metirke in podrobneje predstavili Microsoft Systems Center Operation Manager ter Hewlett Packard Operation Manager. Preučili smo, kako lahko operacijski upravnik podpre dva Cobit 4.1 procesa, DS3 »Upravljanje in delovanje zmogljivosti« in DS4 »Zagotavljanje neprekinjenosti storitve« procesa iz domene »Izvajajte in podpirajte«. V praktičnem delu smo razvili testno storitev Virtualna blagajna, upravljavski modul za to storitev ter razširitveni upravljavski modul. Prikazali smo upravljanje te storitve z operacijskima upravljalnikoma, z Microsoft Systems Center Operation Manager ter deloma tudi s Hewlett Packard Operation Manager. Na koncu smo preverili zastavljene cilje, navedli omejitve diplomskega dela, povzeli rezultate ter podali napotke za nadaljnje delo.
Keywords: Operacasijki upravnik, COBIT, ITIL, nadzor in upravljanje informacijskih storitev, Microsoft Systems Center Operation Manager ter Hewlett Packard Operation Manager.
Published in DKUM: 06.09.2016; Views: 1261; Downloads: 209
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