Autor: Horbay, Orest - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimization of the semi-active vibration absorbers
Autorzy:: Snitynskyy, Volodymyr
Kernytskyy, Ivan
Diveyev, Bohdan
Horbay, Orest
Fornalchyk, Yevhen
Humenuyk, Ruslan
Sholudko, Yaroslav
Powiązania:: https://bibliotekanauki.pl/articles/35536985.pdf
Data publikacji:: 2021
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: dynamic vibration absorber
semi-active
adaptive scheme
optimization
robustness
design
Opis:: In this paper, an efficient numerical approach is proposed to maximize the minimal damping of modes in a prescribed frequency range for general viscous tuned-mass systems. Methods of decomposition and numerical synthesis are considered on the basis of the adaptive schemes. The influence of dynamic vibration absorbers and basic design elastic and damping properties is under discussion. A technique is developed to give the optimal DVA’s for the elimination of excessive vibration in sinusoidal and impact forced system. One task of this work is to analyze parameters identification of the dynamic vibration absorber and the basic structure. The questions of robustness at optimization of DVA are considered. Different types of control management for semi-active DVA’s are applied. Examples of DVA’s practical implementation are presented.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2021, 30, 2; 327-336
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Prospects of electrosleep therapy devices for long-distance drivers
Autorzy:: Kernytskyy, Ivan
Storchun, Yevhen
Yakovenko, Yevheniia
Horbay, Orest
Humenuyk, Ruslan
Sholudko, Yaroslav
Powiązania:: https://bibliotekanauki.pl/articles/1064797.pdf
Data publikacji:: 2020
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: encephalogram
biorhythm
correlation coefficient
impulse signal
electrosleep therapy devices
long-distance driver
Opis:: Accomulated exhaustion is a fairly common problem for long-distance truck and bus drivers on international routes. In case of uncompensated exhaustion, the driver is unable to overcome the resulting attention violations with will effort, which increases the probability of errors and accidents. The last claim is confirmed by the increase in the number of incidents after 7 h and especially 10 h of work. To overcome this problem, it is necessary to stop and fall asleep for a short time. Recovery comes in about 10–15 min of relaxation. The source of stimulation of the brain is weak impulse current, which causes sleep of varying depth and duration. Clinical studies have shown that the strongest impact is on pulses with a duration of approximately 0.3– –0.5 ms and a frequency of repetition ranging from 0.5–2 to 80–100 Hz. Current levels are typically between 50 and 5 mA. Transcranial electrotherapy is considered to stimulate endorphin production and affect the hypothalamus, causing changes in neurohormonal regulatory mechanisms and reticular formation of the brain stem. The reticular formation is involved in many behavioral reactions and has a significant impact on body functioning and thought processes. The aim of this work was to determine correlation between human brain biorhythms and electrosleep device signal by calculating mutual correlation. For this purpose, the model in MATLAB Simulink environment was developed. The encephalogram was processed using the EEGLAB tool to remove artifacts. A model in the MATLAB Simulink environment was developed to evaluate the effect of the signal characteristics of electrosleep therapy devices on brain biorhythms, with the help of which correlation coefficients were calculated.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2020, 29, 4; 454-460
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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