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1.

001-es BibID:BIBFORM103518
035-os BibID:(cikkazonosító)8862 (WOS)000851006900001 (Scopus)85137759099
Első szerző:Erdei Timotei István (mechatronikai mérnök)
Cím:Design of a digital twin training centre for an industrial robot arm / Timotei István Erdei, Rudolf Krakó, Géza Husi
Dátum:2022
ISSN:2076-3417
Megjegyzések:The Cyber-Physical and Intelligent Robotics Laboratory has been digitally recreated, and it includes all the key elements that allow 6-axis industrial robots to perform PTP, LIN, and CIRC motions. Furthermore, the user can create a program with these motion types. The human-machine interface is also integrated into our system. It can also assist SMEs in developing their in-house training. After all, training on an industrial robot unit does not entail installation costs within the facility. Nor are there any maintenance and servicing costs. Since the lab is digital, additional robot units can be added or removed. Thus, areas for training or production can be pre-configured within each facility. Because of the customizability and virtual education format, there is no room capacity problem, and trainees can participate in the exercises in parallel. Exercises were also conducted to evaluate the program's impact on teaching, and the results showed that using machine units can improve teaching. Even today's digital labs cannot physically convey the sense of space or the relative weights of different elements in virtual space. Even with these features, individuals can operate a machine more effectively than relying solely on traditional, non-interactive demonstration materials.
Tárgyszavak:Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
industrial robot
digital twin
hmiCPS Lab
industry 4.0
Unreal Engine
Megjelenés:Applied Sciences-Basel. - 12 : 17 (2022), p. 1-25. -
További szerzők:Krakó Rudolf Husi Géza (1962-) (gépészmérnök, mechatronikai mérnök, számítógépes tervezőmérnök)
Internet cím:DOI
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2.

001-es BibID:BIBFORM099887
035-os BibID:(cikkazonosító)1057 (Scopus)85123110884 (WOS)000754950800001
Első szerző:File Máté
Cím:Optical Investigation of the Limits of Modeling the Nonlinear Elastic Behavior of PA6 Using Linear Elastic Material Models / Máté File, Tamás Mankovits, Dávid Huri
Dátum:2022
ISSN:2076-3417
Megjegyzések:Featured Application In the design of engineering polymeric products, the detailed finite element investigation is indispensable. In most cases, polymeric products are investigated with multilinear material models over the entire stress-strain range. The definition of these material models requires material parameters, which must be obtained through time and cost demanding laboratory measurements. For some applications, such as quasi-static loading, it would be sufficient to use a linear elastic material model, the material constants of which can be obtained quickly. This article can help designers to apply the right material model as the linear elastic material model can be used until the 0.96% strain value in the case of the PA6 material with sufficient accuracy. One of the most critical issues during polymer finite element simulations is the selection of the proper material models. The widely used and accepted multilinear material models require load case-specific material tests, which are time and cost demanding. Data for these characteristics must be acquired by standardized measurements. On the other hand, the parameters required to create a linear elastic material model in most cases are easy to obtain, and the establishment of the model is a shorter process. This research is aimed to provide information to engineers about the possibility of modeling the nonlinear elastic materials by using linear elastic material models and about the limits of such models. To create the most accurate material models, laboratory measurements were performed on polyamide (PA6) material, which is a widely used raw material in the industry. Test specimens were manufactured to obtain material constants according to the ISO 527-2 standard, and for validating the effectiveness of the applied material models, three different tensile specimens were created, which were tested under quasi-static loading in the elastic region. A comprehensive finite element investigation was performed, and the numerical results were then compared to laboratory measurements using the GOM Aramis digital image correlation (DIC) system. By comparing the optically measured strain data to the numerical results, it was determined that the nonlinear elastic materials can be modeled using linear elastic models in a well identifiable strain range with sufficient accuracy.
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
polyamide 6
finite element analysis
digital image correlation
material model fitting
Megjelenés:Applied Sciences-Basel. - 12 : 3 (2022), p. 1-16. -
További szerzők:Mankovits Tamás (1981-) (gépészmérnök) Huri Dávid (1990-) (gépészmérnök)
Internet cím:DOI
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3.

001-es BibID:BIBFORM102153
035-os BibID:(Scopus)85131553351 (cikkazonosító)5451 (WOS)000809194500001
Első szerző:Huri Dávid (gépészmérnök)
Cím:Surrogate Model-Based Parameter Tuning of Simulated Annealing Algorithm for the Shape Optimization of Automotive Rubber Bumpers / Dávid Huri, Tamás Mankovits
Dátum:2022
ISSN:2076-3417
Megjegyzések:Featured Application The developed surrogate model-based parameter tuning method of the simulated annealing algorithm is suitable for solving not only numerical simulation optimization problems but also other computationally intensive model-driven optimizations. A design engineer has to deal with increasingly complex design tasks on a daily basis, for which the available design time is shrinking. Market competitiveness can be improved by using optimization if the design process can be automated. If there is limited information about the behavior of the objective function, global search methods such as simulated annealing (SA) should be used. This algorithm requires the selection of a number of parameters based on the task. A procedure for reducing the time spent on tuning the SA algorithm for computationally expensive, simulation-driven optimization tasks was developed. The applicability of the method was demonstrated by solving a shape optimization problem of a rubber bumper built into air spring structures of lorries. Due to the time-consuming objective function call, a support vector regression (SVR) surrogate model was used to test the performance of the optimization algorithm. To perform the SVR training, samples were taken using the maximin Latin hypercube design. The SA algorithm with an adaptive search space and different cooling schedules was implemented. Subsequently, the SA parameters were fine-tuned using the trained SVR surrogate model. An optimal design was found using the adapted SA algorithm with negligible error from a technical aspect.
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
finite element analysis
hyperelastic material model
support vector regression
engineering optimization
simulated annealing
parameter tuning
Megjelenés:Applied Sciences-Basel. - 12 : 11 (2022), p. 1-22. -
További szerzők:Mankovits Tamás (1981-) (gépészmérnök)
Internet cím:Szerző által megadott URL
DOI
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4.

001-es BibID:BIBFORM085890
035-os BibID:(cikkazonosító)3584 (WOS)000541440000245 (Scopus)85085608229
Első szerző:Huri Dávid (gépészmérnök)
Cím:Parameter Selection of Local Search Algorithm for Design Optimization of Automotive Rubber Bumper / Dávid Huri, Tamás Mankovits
Dátum:2020
ISSN:2076-3417
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Applied Sciences-Basel. - 10 : 10 (2020), p. 1-16. -
További szerzők:Mankovits Tamás (1981-) (gépészmérnök)
Internet cím:DOI
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5.

001-es BibID:BIBFORM094624
035-os BibID:(cikkazonosító)4943 (WOS)000659635900001 (Scopus)85107914481
Első szerző:Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:Systematic analysis of micro-fiber thermal insulations from thermal properties point of view / Ákos Lakatos, István Csarnovics, Attila Csík
Dátum:2021
ISSN:2076-3417
Megjegyzések:This paper contains laboratory measurements of four different micro-fiber thermal insulation materials to reveal their applicability limits under various environmental conditions. On the samples, scanning electron microscope investigations were executed to disclose the structure of the fibers. The study also investigated the most important thermal parameters of the samples, namely, the thermal conductivity and the calorific value with the specific heat capacity. Humidity measurements and hydrophobic tests were also conducted and the sorption isotherm of the samples was registered. To reveal the thermal stability as well as the applicability limits, differential scanning calorimetry and Raman spectroscopy measurements have also been performed. As a result of these comprehensive measurements, one can predict the behavior of the samples in various external circumstances. The results can generate further studies and are very useful for both designers, planners, and researchers. In the European Union, almost 40% of all energy consumption comes from buildings, while another 20-25% comes from transport. In the European Union, including Hungary, only buildings with almost-zero energy demand could be built after 2020, and the use of renewable energies must be strengthened. The Renewable Directive stipulated that by 2020, the share of renewable energy in buildings must be 25%, and in transport it must be 10%; the use of electric vehicles is vital. There are about four million dwellings in Hungary, of which approximately three million need to be renovated, and only some of these (a few hundred) meet the cost-optimized level of the 2020 directive. The use of insulation materials is very important in the transport sector, too. Insulation materials are also used by aircraft and electric vehicles. To reduce the energy loss from buildings, different insulation materials can be used; investigations of insulation materials are very important. This paper presents a comprehensive research report on insulation materials which could be used for building elements, HVAC (heating, ventilation, and air conditioning appliances) equipment, and vehicles. In this paper, laboratory investigations will be presented along with calculations to better understand the properties and behavior of these materials. For this, firstly structural analysis with scanning electron microscope will be presented. Moreover, the paper will present thermal conductivity and combustion heat measurement results. The sorption and hydrophobic behavior of the materials will be also revealed. Finally, the article will also display differential scanning calorimetry measurements and Raman spectroscopy results of the samples. The research was conducted on four different types of colorized microfiber lightweight wool insulation.
Tárgyszavak:Műszaki tudományok Anyagtudományok és technológiák idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
thermal properties
fibrous insulation
sthermal insulation
Megjelenés:Applied Sciences-Basel. - 11 : 11 (2021), p. 1-18. -
További szerzők:Csarnovics István (1986-) (fizikus) Csik Attila (1975-) (fizikus)
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6.

001-es BibID:BIBFORM089143
035-os BibID:(cikkazonosító)7824 (WoS)000588986300001 (Scopus)85095707299
Első szerző:Lakatos Ákos (fizikus, környezetmérnök, létesítménymérnök)
Cím:Exceeding the Applicability Limit of Aerogel Super Insulation Materials in Different Environmental Conditions / Ákos Lakatos
Dátum:2020
ISSN:2076-3417
Tárgyszavak:Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Applied Sciences-Basel. - 10 (2020), p. 1-14. -
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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7.

001-es BibID:BIBFORM094403
035-os BibID:(cikkazonosító)4542 (Scopus)85106890160 (WOS)000662485800001
Első szerző:Szántó Attila (gépészmérnök)
Cím:Dynamic Test Measurements and Simulation on a Series Wound DC Motor / Attila Szántó, János Kiss, Tamás Mankovits, Gusztáv Áron Szíki
Dátum:2021
ISSN:2076-3417
Megjegyzések:Previously, a dynamic model and a simulation program for series wound DC motors (SWDCM) were developed in MATLAB/Simulink for modelling them in electric vehicles and mechatronic systems. The electromagnetic characteristics of the motor (electric resistances, dynamic inductances), which serve as input parameters of the program, were also measured. Additionally, locked rotor response measurements were performed to test the accuracy of the measured electromagnetic characteristics. This paper presents the experimental procedure and the results of dynamics test measurements that were performed on the same motor, including the procedure for the determination of the necessary input dynamic parameters for the simulation. While the motor spins up from rest, the intensity of the electric current and the angular speed of the rotor are measured. Finally, the simulation and dynamic test results are compared to check the proper operation of the simulation program.
Tárgyszavak:Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
series DC motor
dynamic simulation
MATLAB
dynamic test measurement
Megjelenés:Applied Sciences-Basel. - 11 : 10 (2021), p. 1-18. -
További szerzők:Kiss János Mankovits Tamás (1981-) (gépészmérnök) Szíki Gusztáv Áron (1973-) (fizikus)
Pályázati támogatás:TKP2020- NKA-04
Egyéb
ÚNKP-20-3
Egyéb
Internet cím:DOI
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8.

001-es BibID:BIBFORM102336
035-os BibID:(Scopus)85131873193 (cikkazonosító)5688 (WOS)000809964500001
Első szerző:Szodrai Ferenc (létesítménymérnök)
Cím:Numerical Assessment of Side-Wind Effects on a Bus in Urban Conditions / Ferenc Szodrai
Dátum:2022
ISSN:2076-3417
Megjegyzések:The drag coefficient is usually considered to be a constant value, which allows us to calculate the aerodynamic losses. However, at lower speeds and wind, this value could be distorted. This also applies to buses in urban environments where due to traffic, the speed is relatively low. Since the schedule of the buses is fixed, based on the driving cycle, they travel at a nominal cruising speed. This makes it possible to examine the drag losses in a quasi-steady condition. To find the magnitude of this distortion in losses, a large-eddy simulation method was used with the help of commercially available software. Symmetrical and asymmetrical flows were induced into the digital wind tunnel to assess the distribution of the forces in the cruising direction and examine the flow patterns. It was discovered that the drag forces behave differently due to the low speeds, and calculations should be performed differently compared to high-speed drag evaluations.
Tárgyszavak:Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
drag loss
side wind
large-eddy simulation
bus
Megjelenés:Applied Sciences-Basel. - 12 : 11 (2022), p. 1-14. -
Pályázati támogatás:ED_18-1-2019-0028
Egyéb
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9.

001-es BibID:BIBFORM086656
035-os BibID:(Scopus)85087316135 (WOS)000554727500001 (cikkazonosító)4313
Első szerző:Szodrai Ferenc (létesítménymérnök)
Cím:Quantitative Analysis of Drag Reduction Methods for Blunt Shaped Automobiles / Ferenc Szodrai
Dátum:2020
ISSN:2076-3417
Megjegyzések:In fluid mechanics, drag related problems aim to reduce fuel consumption. This paper is intended to provide guidance for drag reduction applications on cars. The review covers papers from the beginning of 2000 to April 2020 related to drag reduction research for ground vehicles. Research papers were collected from the library of Science Direct, Web of Science, and Multidisciplinary Digital Publishing Institute (MDPI). Achieved drag reductions of each research paper was collected and evaluated. The assessed research papers attained their results by wind tunnel measurements or calculating validated numerical models. The study mainly focuses on hatchback and notchback shaped ground vehicle drag reduction methods, such as active and passive systems. Quantitative analysis was made for the drag reduction methods where relative and absolute drag changes were used for evaluations.
Tárgyszavak:Műszaki tudományok Gépészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
active flow control
passive flow control
coefficient of drag
ground vehicle
car
Megjelenés:Applied Sciences-Basel. - 10 : 12 (2020), p. 1-19. -
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