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A system engineering approach for robot manipulator design using game engine simulation and computational modelling
No full textModern game engine platforms are increasingly used in the field of robotics due to their built- in support for creating real-time simulation within an Extended Reality (XR) environment. This research investigates the integration of game engine platforms into systems engineering processes in the robotics domain. A novel method for the design of robotic manipulators, focusing on actuator selection, based on robot motion simulation within game engine platforms using integrated functionalities for joint torque calculation, is presented. The proposed robot model integration methodology involves the use of a CAD-based robot model, the game engine’s physics engine, and MATLAB Simscape as an intermediate modeling environment. This approach enables appropriate actuator selection, verification of component dimensioning, and accelerates the design process. The proposed approach offers a cost-effective and flexible alternative to traditional simulation environments and offers enhanced immersive visualization of robotic systems through XR technologies. The simulated joint actuator torques are verified using MATLAB Simscape for a 6-DoF articulated robot model
Positioning of Architect in Emerging Architecture
No full textThis research investigates the evolving role and positioning of the architect within data-driven and artificial intelligence design processes in emerging architecture. As digital thinking continues to reshape architectural practice, the study explores the intersection between computational approaches—exemplified by the “digital chain” as the direct design-fabrication connection (Hovestadt, 2005), AI and traditional, analogue design methods. Through qualitative inquiry, including a focus group of digitally engaged architects, the study emphasizes the enduring relevance of human-centric skills such as intuition, empathy, and creativity in an increasingly algorithmic design environment.
Positioning is interpreted both as the architect's evolving role and their influence within design-realization cycles. Drawing from theorists such as Negroponte, Schoen, Carpo, Lawson, Cross, Leach, and Colomina, the research frames architecture as a hybrid space where the human factor remains an unpredictable yet essential force. Computational design is viewed not merely as automation but as an extension of natural intelligence, enhancing creative potential through artificial intelligence.
Through the lens of leading digital practitioners—Gramazio & Kohler, Burry, Aish, and Menges—the research identifies a shift in architectural authorship: from isolated design stages to integrated, continuous involvement across ideation, digital tooling, and fabrication. Key findings include the redefinition of digital methods through traditional integration, the architect’s expanded control over realization, and the necessity for new competencies among digitally professionals.
Rather than prescribing fixed roles, the study proposes flexible “zones of influence” with(in) the digital and artificial. It argues that architects must act as conduits between human insight and machine precision—preserving creative identity while navigating the demands of a data-driven and AI, collaborative, and technologically mediated future
Application of modern test methods and engineering practice on pressure vessels
No full textIn welding, a highly multidisciplinary field, quality assurance is crucial. Even minor deviations fromthestringent requirements set by welding standards can lead to defects in welded joints. This is especiallytrueforpressure equipment fabricated with materials for high-temperature service, where small variations inkeyparameters almost inevitably cause defects. When defects are detected and the installation of newcomponentsis not an option, a numerical simulation can be an effective modern method to assess the integrity of theweld. By interpreting the results of these simulations and combining them with sound engineering practice, thereliability and functionality of the component can be proven, minimizing the need for costlyreworkorreplacement. For example, indications were found in the superheater tubes of SteamBoiler 1, fabricatedforthe "Šoštanj" Thermal Power Plant in Slovenia. These were discovered using destructive testing methods, asconventional nondestructive testing methods, which were mandated for final inspection, failed to detect them. A detailed analysis revealed the root cause: an excessively high quality class for the welded jointswasspecified in the design, exceeding what was necessary. While the designer correctly prioritized the structural integrity and load-bearing capacity of this pressureequipment, the attempt to achieve an unnecessarily high-quality class of welds resulted in inadequatepreparation. This, in turn, made the occurrence of defects in the welded joints inevitable. To prove the load-bearing capacity of the welded joints, a numerical simulation was performed. Thissimulation demonstrated the welds' resistance to static load for several potential loading scenarios, evenwithcritical indications present at the weld root. The simulation also provided the values for the maximumpossibleloads before the onset of plasticity
Evaluation of the compressive properties of different 3D-printed Ti6Al4V lattice structures
No full textSTATIC CALCULATION OF SMOKE EXHAUST DUCT CONSTRUCTION IN FIRE CONDITIONS USING FEM
No full textThis paper describes a numerical methodology for analysing the stress and strain state of
structural elements of smoke exhaust ducts under the fire conditions. The research is based on sheet
metal ducts, and the stress and strain state under temperature changes is determined. The numerical
analysis was performed using the finite element method in the software "Abaqus". A review of existing
research in the field of load-bearing capacity of structural elements at elevated temperatures is also
provided in this paper
Primena i dimenzionisanje hidrociklona u papirnoj industriji
No full textKonstantni deo papir mašine je deo pripreme papirne mase između rezervoara u kome se skladišti razvlaknjena papirna masa i natočnog korita. Sastoji se od više tehnoloških celina koje obavljaju različite funkcije kao što su izdvajanje nečistoća, rafinacija, deaeracija (uklanjanje vazduha) i razvodnjavanje mase, tj. kontrola koncentracije čvrste materije, pre nego što papirna masa bude ravnomerno raspodeljena po širini papir mašine u natočnom koritu. Dobro projektovan sistem obezbeđuje kontinuirani protok suspenzije sa stalnom koncentracijom, kvalitetom i protokom, pri konstantnom pritisku, ka natočnom koritu. Poželjno je da varijacije protoka mase budu manje od 1% u odnosu na nominalnu vrednost. Hidrocikloni imaju ključnu ulogu u sistemu pripreme papirne mase jer poboljšavaju njenu čistoću pre nego što ona stigne do natočnog korita. Oni predstavljaju posebnu vrstu centrifugalnih prečistača koji uklanjaju neželjene čestice iz suspenzije, kao što su: pasak, druge čvrste čestice mineralnog porekla, metalne čestice, ostaci boje, plastika. Princip rada hidrociklona zasniva se na tangencijalnom ubrizgavanju papirne mase velikom brzinom, pri čemu se u uređaju stvara vrtložno kretanje. Zahvaljujući centrifugalnim silama, teže čestice (nečistoće) se potiskuju ka spoljnim zidovima i izlaze kroz otvor/priključak u donjem delu uređaja, dok tečna faza manej gustine, tj. prečišćena suspenzija izlazi kroz otvor/priključak u gornjem delu uređaja i nastavlja ka natočnom koritu. U ovom radu je analizirana primena hidrociklona u papirnoj industriji i prikazana je metodologija za dimenzionisanje i izbor ovih uređaja
Functional analysis of LIDAR technology in optimizing efficiency and sustainability in construction sector
No full textThe construction is fraught with growing environmental and efficiency issues contributing a significant percentage toward the use of energy worldwide and carbon emission. Among several technologies that are now coming to light in the sustainable area of management of construction, one with good promise is LIDAR (Light Detection and Ranging). The purpose of this research is to fill a big knowledge gap regarding the direct impacts on construction project management from LIDAR, like cost, safety, environmental influence, precision, and efficiency. The results, therefore, demonstrate that there were significant improvements in different aspects of the system, which included time efficiency (0.27), cost-saving (0.126 average effect), safety (0.148), and reduction of environmental impact (0.372). Equally, the value of the predictive relevance Q2 = 0.529 further highlights the capability of the model for accurate predictions. This study supports the view that integration of LIDAR may be a strategic enabler of sustainable practice
EFFECTS OF EMPLOYEES’ ATTITUDES TOWARDS DIGITAL TRANSFORMATION FACTORS ON SMES’ SUSTAINABILITY AND FINANCIAL PERFORMANCE1
No full textDigital transformation is the most frequently analysed from the technological perspective. The following research investigates the social elements of organisational digital transformation, by placing employees in SMEs in focus. After extensive literature review the research questions and related hypotheses were defined. To test the proposed hypotheses, a questionnaire was eveloped, and 635 responses were received from individual owners, managers, and employees in organizations from Serbia, Bulgaria, and Visegrad Four countries (V4). A structural equation model has been used to explore the mediating effect on the relationship between the employee’s attitudes and their perceived opinions on the organisations’ sustainability and financial performance. All relationships within stated hypotheses were confirmed. It was revealed that employees’ positive attitude towards digitalisation is improving their self-efficacy in the digitalized work environment and, at the same time, decreasing their level of anxiety regarding such workplaces. Increased self-efficiency and lower anxiety strengthen the organization’s sustainability, which, in turn, positively influences financial performance. According to the obtained results, from the group of questions describing the attitude of the respondents towards the digitalisation of their workplaces, it
was revealed that most of the respondents consider that the digital transformation of their firms is a great idea in general (with a mean value of 3.883 on a scale of 5). Despite the lower mean value
of 3.321, a large majority of them indicated that working in a digitalised environment is exciting. When it comes to self-efficacy in a digitalised work environment, most respondents advise that
they need support and adequate task time available when completing their tasks. Importantly, the support they would find beneficial is someone they can contact if they require assistance
and/or a help assistant built into the application. Regarding the anxiety resulting from the digital transformation of their working environment, it can be determined that most of the respondents do
not experience a high level of it, considering the low mean values ranging from 1.869 to 1.937, on a scale of 5.contract no. 451-03-137/2025-03/ 20010
Design And Development Of Lightweight Stabilization Platform For Multicopters Armament
No full textFor the usage of armament that requests precision targeting on mul-ticopters (rotary-wing drones), it is necessary to provide the best possible sta-bilization with some mechanism that, at the same time, must be lightweight. This paper presents a lightweight stabilization platform based on the Stewart platform mechanism. This parallel mechanism (a mechanism that contains a closed kinematic chain) has six degrees of freedom inside the workspace. The platform must be able to stabilize all disturbances due to the flight of the mul-ticopter and must withstand the recoil of armament if it exists
The influence of dwell time on the collected data during linear displacement measurements of machine tools
No full textDuring linear displacement measurement of CNC machine tools (MT) with laser interferometer the optical components are moved along the measured axis. At the selected measurement points of the axis the optics stops and data collection is performed. At the beginning of the stopping cycle, because
of the inertion of the optics and the MT structure, vibrations occure, which spoils the collected data. To minimize the dwell time, the time needed to wait at the measurement point, the number of the collected position data needs to be minimized. In this work through an example is represented the
influence of the number of collected data on the measurement values during linear displacement measurements of machine tools.Editor of chief: Assistant Professor Dejan Branković, PhD
Executive editor: Milivoj Stipanović, Bs