Acta Mechanica Slovaca, 2025 (vol. 29), issue 3
Diagnostics of Fault in wind Turbine Rolling Eelement Bearing using Frequency Analysis
Fatima Zohra Cherrad, Chakib Drif, Houria Salhi, Abdenour Soualhi, Hamou Nouri
Acta Mechanica Slovaca 2025, 29(3):6-14 | DOI: 10.21496/ams.2025.015 
This paper is devoted to the study of wind turbine bearing failures. As maintenance costs in the wind industry are quite high, we are interested in developing approaches to minimize costs and optimize wind turbine downtimes and ensure the safety of people and property. Different techniques are used for fault analysis such as short-time Fourier transform, wavelet analysis, model-based analysis and vibration method. Each analysis technique has its preferred field of application. This paper explains the procedure for detecting bearing faults using Electromechanics analysis by characterizing each fault by a well-defined frequency. The analysis is carried...
Uterine Factor Infertility: Current Therapeutic Frontiers and the Promise of Uterine Bioengineering
Zuzana Trebuňová, Erik Dosedla, Jozef Živčák, Peter Frankovský
Acta Mechanica Slovaca 2025, 29(3):16-22 | DOI: 10.21496/ams.2025.026
Absolute uterine factor infertility (AUFI), resulting from congenital absence or non-functionality of the uterus, affects approximately 1 in 500 women of reproductive age and remains one of the most challenging forms of female infertility. While uterine transplantation has enabled successful pregnancies, it is associated with substantial limitations including donor scarcity, long-term immunosuppression, and ethical concerns. As a promising alternative, uterine tissue engineering aims to restore reproductive function using biocompatible scaffolds, often combined with stem or progenitor cells. This review summarizes current experimental and clinical...
Design of Control System Architecture for Intelligent Fixture
Ján Kušnír, Jozef Brindza, Michal Demko, Filip Dominik, Marek Vrabeľ
Acta Mechanica Slovaca 2025, 29(3):24-29 | DOI: 10.21496/ams.2025.025
We present a compact architecture for an intelligent fixture aimed at stabilizing the milling of thin-walled aerospace parts. The system fuses multi-sensor inputs tri-axial accelerometers (5-30 kHz) for vibration/chatter, strain or dynamometer signals (1-5 kHz) for cutting/clamping loads, and low-rate pressure/temperature (≤ 100 Hz) for thermal/fixturing state with an "edge to cloud" computing stack. A Raspberry Pi 5 performs synchronized windowing (0.5-1.0 s, 50% overlap), time-frequency analysis (STFT/wavelets), and lightweight features (RMS, crest factor, band energies, relative wavelet energy, entropy). Unsupervised detectors (one-class models,...
Electrical Energy Generation using Thermoelectric Modules and Plane Mirror Solar Collector
Francis Onoroh, Adeyinka Abdulquadri Oluwo, Nehemiah Sabinus Alozie
Acta Mechanica Slovaca 2025, 29(3):30-40 | DOI: 10.21496/ams.2025.022
The negative effects of global warming resulting from an over-reliance on fossil fuels have been more apparent in recent times. The impending depletion of these resources is a significant threat to humankind's future. Thus, the necessity of creating safe, reliable, and sustainable energy sources is becoming more widely acknowledged. This research developed a solar thermoelectric generator using a plane mirror as a concentrator. The system consists of a plane mirror to concentrate sunlight, a receiver plate, TEG1-241-1.4-1.2 modules, a heat sink, a storage battery, and a power inverter. Temperature across the modules' interface was measured and is used...
Influence of Double Layer Configuration on the Quality of the Sheared Edge of Blanks Produced from Soft Electrical Steel
Martin Matej Benda, Emil Spišák, Peter Mulidrán, Ľuboš Kaščák
Acta Mechanica Slovaca 2025, 29(3):42-47 | DOI: 10.21496/ams.2025.024
Blanking in double layered configuration is unexplored technology producing blanks with quality of the sheared edge that cannot be predicted accurately using same criteria as in prediction of blanks produced by conventional blanking as each layer in configuration is blanked under different conditions. While the top layer is in contact with the set geometry of the punch and blankholder, the die is replaced with bottom layer. In the case of the bottom layer, it is in contact with set geometry of the die and the punch is replaced with the top layer. Research on double layer samples and conventional samples was conducted. Samples were observed under Keyence...
Modern Combustion Technologies and Their Contribution to the Development of Industrial Energy
Romana Dobáková, Milan Fiľo
Acta Mechanica Slovaca 2025, 29(3):48-53 | DOI: 10.21496/ams.2025.027
The article discusses the planned implementation of a new biomass boiler in an industrial enterprise, which represents an important step towards increasing the company's energy self-sufficiency and sustainable operation. The technology described is based on a high-pressure fluidized bed steam boiler with a connected backpressure turbine. This solution will enable more efficient electricity generation and rational use of available heat. As part of the assessment process, an analysis of capital investments, operational benefits, and environmental impacts was carried out.
Path Optimization of a Mobile Robot Platform with a Robotic Arm
Patrik Pilát, Jozef Varga, Ján Semjon, Matúš Sabol
Acta Mechanica Slovaca 2025, 29(3):54-60 | DOI: 10.21496/ams.2025.023
This paper presents the development and simulation of a path optimization approach for a mobile assistive service robot equipped with a robotic manipulator arm to operate in hot gas chamber. The proposed control architecture integrates Model Predictive Control (MPC) with Jacobian-based Inverse Kinematics (IK) for enabling smooth, adaptive motion planning even under dynamically changing environmental conditions. A Matlab based simulation setup was used to verify the control approach using random disturbances to simulate real-world complications like payload mass variations, centre of gravity shifts, and obstacle interference. Results show that MPC adapts...
Analysing the Mechanical Behaviour of Sandwich Beams and the Impact of Geometric Shape on Bending Performance
Naili Takieddine, Ghouari Lahcene, , Benatmane Charafeddine, Nouar Salim
Acta Mechanica Slovaca 2025, 29(3):62-74 | DOI: 10.21496/ams.2025.021
This study attempts to study the effect of geometric and mechanical properties on the bending behaviour of simply reinforced sandwich beams. According to the theory of simple beams. We used ABAQUS 2016 and the C3D8R element type with a consistent mesh size of 2 mm to simulate a three-point bending configuration with displacements of 0.1 mm to 0.6 mm. Tangential behaviour was used to simulate contact interactions. Numerical results for stresses and displacements were calculated. We modelled the bending behaviours of two models of aluminium alloy EN AW-1050A beams loaded with imposed displacements by bending. The comparison was made using a honeycomb...