Univerzitná knižnica - Vedecké odborné časopisy
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Item Technológ - celé číslo 4/2025(University of Žilina, 2025)Item Štúdia laserového zvárania medených zliatin s dôrazom na kvalitu spoja(University of Žilina, 2025) Kantoríková, ElenaThe article deals with the issue of laser welding of copper alloys and the analysis of the properties of the welded joint. The study compared selected technological parameters of the process, the procedure for creating the welded joint, and evaluated the technological properties of the welded material. The aim of the work is to contribute to a more effective setting of laser welding parameters and to improve the quality of the resulting welds of copper alloys.Item Prídavky pre zápustkové výkovky(University of Žilina, 2025) Melo, BorislavThe presented article focuses on the issue of determining allowances for semi-finished products manufactured by drop forging technology. The advantages of this method of manufacturing semi-finished products and its shortcomings are pointed out. The relations for determining allowances for this type of semi-finished product are published. The text is supplemented with diagrams of the layers of allowances on the surface of the parts.Item Modernization of company to digital processes by implementing a new data approach for industrial operations(University of Žilina, 2025) Biňasová, Vladimíra; Mičieta, Branislav; Kasajová, Marta; Zuzik, JánThis paper focuses on the critical role of data as a key asset in the modern enterprise. The proposed approach involves the creation of an integrated data architecture that enables the collection, processing, analysis and visualization of real-time data from various industrial sources (e.g. IoT sensors, manufacturing systems, ERP). A key aspect is the application of advanced analytical methods, including machine learning, for predictive maintenance, quality optimization and energy consumption management.Item Additive manufacturing technology(University of Žilina, 2025) Domaniková, Ivana; Blatnický, Miroslav; Dižo, Ján; Slušňák, PatrikThe article presents an informative overview on the challenges of additive manufacturing technologies. It highlights various methods and their practical applications. Additive manufacturing offers an innovative approach to producing a wide range of objects by depositing material layer by layer according to a digital model. The article describes the fundamental operating principles, commonly used materials, and key areas in which additive manufacturing is implemented. We will describe the benefits of using this manufacturing method, including product customization, reduced material waste, and shorter production times. Our aim is to acquaint the reader with the technology of additive manufacturing and the principles underlying its operation.Item Využitia umelej inteligencie pre tvorbu analýzy FMEA(University of Žilina, 2025) Bubeník, Peter; Rakyta, Miroslav; Buzalka, Martin; Biňasová, VladimíraThe identification and assessment of risks in manufacturing processes FMEA (Failure Modes and Effects Analysis) is proving to be an effective maintenance tool. With the advent of artificial intelligence (AI), new possibilities for a more intelligent and predictive approach to maintenance are emerging. This article deals with the principles of FMEA and the use of artificial intelligence.Item Návrh kompaktnej dosky plošných spojov pre presné snímanie analógového vstupu(University of Žilina, 2025) Bučko, Martin; Samaš, Vladimír; Slušňák, PatrikThe article deals with the design and implementation of a measurement system intended for accurate detection of linear displacement in the braking mechanism during brake lining testing. The measurement is carried out using the analogue sensor Larm LS501, whose output, due to the mechanical design, utilizes 40% of the available measurement range. The signal from the sensor is converted into digital form using a 16-bit ADS1115 analogue-to-digital converter, which allows obtaining approximately 13,107 measurement increments over a total displacement of 400 mm. The resulting measurement resolution is approximately 0.0305 mm per increment. The system is controlled by an ATmega328P processing unit implemented as an Arduino Nano module, which provides data processing and communication via the I²C interface. The electronic part is realized on a two-layer printed circuit board with dimensions of 90 × 45 mm, which, in addition to the processor and converter, includes power and filtering components, input connectors, and four additional analogue channels available in 10-bit resolution. The proposed solution provides a compact, easily serviceable, and cost-effective system for precise linear displacement measurement in a brake inertia test stand.Item Overview of emerging technologies advancing Industry 4.0(University of Žilina, 2025) Biňasová, Vladimíra; Mičieta, Branislav; Gašo, Martin; Furmannová BeátaThis paper summarizes the key technological pillars that define the concept of Industry 4.0 (the fourth industrial revolution) and analyzes their transformative potential for modern manufacturing and industrial operations. Industry 4.0 is characterized by the fusion of digital and physical technologies, leading to the creation of intelligent, fully connected and flexible manufacturing systems.Item Eigenanalysis of a valvetrain simplified model of a combustion engine with 3DOF(University of Žilina, 2025) Dižo, Ján; Blatnický, Miroslav; Dziubak, TadeuszA valvetrain is a necessary structural unit of every combustion engine with discontinued combustion process. It ensures changing cylinder filling, allow low level of exhaust emissions and an optimal combustion process. There are several types of valvetrains depending on their design solution. In principle, there are recognized older valvetrain systems marked as OHV (overhead valve engine) and OHC (overhead camshaft engine). Regardless of a type of valvetrain, they include several components, which are in mutual connection. As they are exposed to dynamic effect during operational conditions, they should have suitable dynamical properties. A valvetrain is a mechanical system. The essential dynamical properties of a mechanical system of a valvetrain of a combustion engine include eigenfrequencies and eigenmodes. The article is focused on eigen analysis of a valvetrain of a combustion engine. Equations of motion of a simplified dynamical model of a valvetrain are derived. Eigen characteristics of a chosen type of a valvetrain are calculated. Matlab software and Simpack multibody software were used for calculation of the derived equations.Item Porovnanie optimalizačných algoritmov pri spektrálnom ladení mechanickej sústavy(University of Žilina, 2025) Majko, Jaroslav; Deganová, Lucia; Piroh, Ondrej; Minárik, JánThis article deals with a comparison of various, gradient-based optimisation algorithms in terms of their accuracy and effectivity. The compared algorithms are the steepest descent method (SDM) and the most well-know quasi-Newton methods. The presented methods were applied to the spectral tuning of a simple two degree of freedom (DOF) mechanism, in order to evaluate their performance. The obtained results were statistically processed and utilised to compare the algorithms, based on their accuracy and overall effectivity. The results show that the quasi-Newton methods are superior to the SDM in terms of both the accuracy and computing time. Moreover, the overall performance of these methods is also significantly less influenced by the selection of starting point. Thus, the obtained results render the quasi-Newton methods as a significantly better choice, compared to the standard SDM.