TY - JOUR AU - Forgács, Anett AU - Lukács, Judit AU - Csiszárik-Kocsir, Ágnes AU - Horváth, Richárd TI - Towards the Investigation of Online Shopping Behaviours Using a Fuzzy Inference System JF - DECISION MAKING: APPLICATIONS IN MANAGEMENT AND ENGINEERING J2 - DECIS MAK APPL MANAG ENG VL - 7 PY - 2024 IS - 2 SP - 337 EP - 354 PG - 18 SN - 2560-6018 DO - 10.31181/dmame7220241059 UR - https://m2.mtmt.hu/api/publication/34825248 ID - 34825248 LA - English DB - MTMT ER - TY - CONF AU - Kohlhéb, Róbert AU - Réger, Mihály AU - Horváth, Richárd TI - Investigation of temperature conditions during friction of metal and polymer materials T2 - 5th International Conference on Thermal Process Modeling and Simulation - TPMS 2024 PB - Associazione Italiana di Metallurgia - AIM Milano C1 - Milano PY - 2024 PG - 6 UR - https://m2.mtmt.hu/api/publication/34816436 ID - 34816436 LA - English DB - MTMT ER - TY - CONF AU - Réger, Mihály AU - Horváth, Richárd AU - Felde, Imre AU - Gonda, Viktor TI - Leakage of impregnated castings T2 - 5th International Conference on Thermal Process Modeling and Simulation - TPMS 2024 PB - Associazione Italiana di Metallurgia - AIM Milano C1 - Milano PY - 2024 PG - 6 UR - https://m2.mtmt.hu/api/publication/34816390 ID - 34816390 LA - English DB - MTMT ER - TY - CONF AU - Gonda, Viktor AU - Felde, Imre AU - Horváth, Richárd AU - Réger, Mihály AU - Varga, Péter TI - Dependence of the residual deformations on the inherent strain parameters for simulated additive manufacturing of MS1 and 316L steel parts T2 - 5th International Conference on Thermal Process Modeling and Simulation - TPMS 2024 PB - Associazione Italiana di Metallurgia - AIM Milano C1 - Milano PY - 2024 PG - 6 UR - https://m2.mtmt.hu/api/publication/34814491 ID - 34814491 LA - English DB - MTMT ER - TY - CHAP AU - Váradi, Péter AU - Lukács, Judit AU - Horváth, Richárd ED - Szakál, Anikó TI - Response Surface Methodology to Characterize the Indicators for the Early Detection of Fraudulent Cases in the Motor Insurance Market T2 - IEEE 11th International Conference on Computational Cybernetics and Cyber-Medical Systems : ICCC 2024 : Proceedings PB - IEEE Hungary Section CY - Budapest SN - 9798350350142 PY - 2024 SP - 000201 EP - 000204 PG - 4 UR - https://m2.mtmt.hu/api/publication/34768936 ID - 34768936 LA - English DB - MTMT ER - TY - JOUR AU - Széles, Levente AU - Horváth, Richárd TI - Eltérő elemszám mellett is azonos térfogattal rendelkező fraktál inspirált metaanyagok tervezése és zömítéssel szembeni mechanikai tulajdonságai. Design and mechanical characterization of fractal-inspired metamaterials of the same volume despite the element number TS - Design and mechanical characterization of fractal-inspired metamaterials of the same volume despite the element number JF - ANYAGVIZSGÁLÓK LAPJA J2 - ANYAGVIZSGÁLÓK LAPJA VL - 34 PY - 2024 IS - 1-4 SP - 6 EP - 17 PG - 12 SN - 1215-8410 UR - https://m2.mtmt.hu/api/publication/34729109 ID - 34729109 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Réger, Mihály AU - Horváth, Richárd AU - Fábián, Enikő Réka AU - Réti, Tamás TI - Modelling the Impregnation of a Pressure-Tight Casting JF - INTERNATIONAL JOURNAL OF METALCASTING J2 - INT J METALCAST VL - Előzetes kiadás / Early view PY - 2024 PG - 11 SN - 1939-5981 DO - 10.1007/s40962-024-01272-1 UR - https://m2.mtmt.hu/api/publication/34722058 ID - 34722058 AB - Pressure tightness is important for many die-cast aluminium castings, but the interconnected porosity formed in the aluminium alloy high-pressure die castings (HPDC) can form a network connecting several surfaces of the casting, especially as a result of machining after casting. The resulting potential leakage path can be imagined as a series of discontinuities varying in size over wide limits, where voids of different volumes are connected by channels of smaller cross section. Although vacuum impregnation is often used to ensure pressure-tightness is a robust technology, cavity systems through the casting can still cause leakage after impregnation. This study addresses the issues of the impregnation of discontinuities with a complex geometry. The elementary part of a complex cavity geometry consists of a cavity and a capillary channel. We estimated the limited permeability of the capillary section using a mathematical model based on the Hagen–Poiseuille equation. The calculation results prove that the degree of filling of the cavity with a capillary section is basically a function of the geometrical characteristics of the cavity, primarily the radius of the capillary. If the cavity system also contains a section with a diameter of less than 28 μm, impregnation does not necessarily ensure the gas tightness of the casting. Depending on the radius of the capillary, the impregnation of a cavity of a given volume and connected to the surface through a capillary section of a given length can produce three different results. Above a certain capillary radius, filling is complete, below a certain capillary radius only the capillary itself will contain resin, and between the two limit values, the partial impregnation of the cavity is expected but the capillary section is not filled. LA - English DB - MTMT ER - TY - JOUR AU - Varga, Bence AU - Tar, József AU - Horváth, Richárd TI - Fractional order inspired iterative adaptive control JF - ROBOTICA J2 - ROBOTICA VL - 42 PY - 2024 IS - 2 SP - 482 EP - 509 PG - 28 SN - 0263-5747 DO - 10.1017/S0263574723001595 UR - https://m2.mtmt.hu/api/publication/34439418 ID - 34439418 AB - Although several studies have revealed that fractional order controllers usually outperform conventional integer-order control solutions, fractional order controllers are not yet widely applied in industrial applications due to their complex mathematical background. In this paper, further improvements of a simple weighted sum feedback design are introduced that imitates the behavior of a fractional order controller but is free from its various formal restrictions. The proposed control solution has the main characteristics of a fractional order controller, such as finite memory length, excellent transient response with no overshoot and robust behavior, but it is placed into a much simpler mathematical framework. In the current paper, a simple derivative term was incorporated in the design which made the controller’s output more stable by completely eliminating output chattering. The proposed control method was developed for a general second-order system. It was tested in a fixed point iteration-based adaptive control scenario, through simulations using a robotic example and on experimental basis as well, utilizing a simple one-degree-of-freedom electromechanical system. The presented experiments are the first systematic investigations of the fixed point iteration-based adaptive control method. LA - English DB - MTMT ER - TY - CHAP AU - Varga, Bence AU - Tar, József AU - Horváth, Richárd ED - Szakál, Anikó TI - Fixed Point Iteration-based Adaptive Control with Output Filtering T2 - SISY 2023 IEEE 21st International Symposium on Intelligent Systems and Informatics PB - IEEE Hungary Section CY - Budapest SN - 9798350343366 PY - 2023 SP - 000509 EP - 000514 PG - 6 DO - 10.1109/SISY60376.2023.10417912 UR - https://m2.mtmt.hu/api/publication/34719282 ID - 34719282 LA - English DB - MTMT ER - TY - JOUR AU - Stadler, Róbert Gábor AU - Horváth, Richárd TI - Akrilnitril-butadién-sztirol (ABS) lemezek kavaró dörzshegesztésének erőtani és kötésszilárdsági vizsgálata JF - ACTA MATERIALIA TRANSYLVANICA (HU) J2 - ACTA MATER TRANSYLV (HU) VL - 6 PY - 2023 IS - 1 SP - 53 EP - 58 PG - 6 SN - 2601-1883 DO - 10.33923/amt-2023-01-09 UR - https://m2.mtmt.hu/api/publication/34135646 ID - 34135646 AB - Jelen tanulmány célja, hogy megvizsgáljuk a kavaró dörzshegesztés technológia alkalmazhatóságát akrilnitril-butadién-sztirol (ABS) típusú polimerre, valamint a hegesztési paraméterek hatását a hegesztés során fellépő erőkre és a hegesztési varrat szilárdságára. A vizsgálatokat 4 mm vastag ABS-lemezeken hajtottuk végre, hagyományos szerszámkialakítás mellett. A bemeneti paramétereket (fordulatszám, előtolási sebesség) 3-3 szinten változtattuk, és teljes kísérlettervet hajtottunk végre. Az erőmérésekből azt a következtetést vontuk le, hogy a hegesztés során fellépő erőértékek közül az előtolási irányú erő (Fy) és az axiális irányú erő (Fz) a domináns. A fordulatszám és az előtolási sebesség (n/vf ) arányszáma növelésével csökkennek az erőkomponensek, míg az előtolási sebesség növekedésével nőnek. A varrat szakítószilárdsága a fordulatszám és az n/vf arányszám növelésével javul, míg az előtolási sebesség növelésével romlik. A legjobb varratszilárdságot (10,69 MPa) 1000 1/perc fordulatszámon és 50 mm/perc előtolási sebességnél mértük. LA - Hungarian DB - MTMT ER -