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    Wyświetlanie 1-12 z 12
    Tytuł:
    Optimal configurations of wave energy converter arrays with a floating body
    Autorzy:
    Zhang, W.
    Liu, H.
    Zhang, X.
    Zhang, L.
    Ashraf, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/260084.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    wave energy
    cylinder array
    power take-off
    hydrodynamic analysis
    Opis:
    An array of floating point-absorbing wave energy converters (WECs) is usually employed for extracting efficiently ocean wave energy. For deep water environment, it is more feasible and convenient to connect the absorbers array with a floating body, such as a semi-submersible bottom-moored disk, whose function is to act as the virtual seabed. In the present work, an array of identical floating symmetrically distributed cylinders in a coaxial moored disk as a wave energy device is proposed The power take-off (PTO) system in the wave energy device is assumed to be composed of a linear/nonlinear damper activated by the buoys heaving motion. Hydrodynamic analysis of the examined floating system is implemented in frequency domain. Hydrodynamic interferences between the oscillating bodies are accounted for in the corresponding coupled equations. The array layouts under the constraint of the disk, incidence wave directions, separating distance between the absorbers and the PTO damping are considered to optimize this kind of WECs. Numerical results with regular waves are presented and discussed for the axisymmetric system utilizing heave mode with these interaction factors, in terms of a specific numbers of cylinders and expected power production.
    Źródło:
    Polish Maritime Research; 2016, S 1; 71-77
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A - 5 dBm 400MHz OOK Transmitter for Wireless Medical Application
    Autorzy:
    Yousefi, M.
    Koozehkanani, Z. D.
    Jangi, H.
    Nasirzadeh, N.
    Sobhi, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/226054.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transmitter
    power amplifier
    on-off keying
    low power
    Opis:
    A 400 MHz high efficiency transmitter for wireless medical application is presented in this paper. Transmitter architecture with high-energy efficiencies is proposed to achieve high data rate with low power consumption. In the on-off keying transmitters, the oscillator and power amplifier are turned off when the transmitter sends 0 data. The proposed class-e power amplifier has high efficiency for low level output power. The proposed on-off keying transmitter consumes 1.52 mw at-5 dBm output by 40 Mbps data rate and energy consumption 38 pJ/bit. The proposed transmitter has been designed in 0.18μm CMOS technology.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 2; 193-198
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Target effect on the kinematics of Taekwondo Roundhouse Kick – is the presence of a physical target a stimulus, influencing muscle-power generation?
    Autorzy:
    Wąsik, J.
    Shan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/306526.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wykorzystanie energetyczne
    prędkość
    precyzja
    balansowanie
    trade-off
    motor control pattern
    power generation
    kicking velocity
    precision
    dynamic balancing
    Opis:
    Taekwondo is famous for its powerful kicking techniques and the roundhouse kick is the most frequently used one. In earlier literature, the influence of a physical target (exiting or not) on kicking power generation has not been given much attention. Therefore, the aim of this study was to investigate the kinematics of roundhouse kick execution and its factors related to power generation. 6 ITF taekwondo practitioners voluntarily participated in this study. They were asked to perform kicks with and without a physical target. The first kick aimed at breaking a board while the second one was a kick into the air. A Smart-D motion capture system (BTS S.p.A., Italy) was used to quantitatively determine their kinematic characteristics during each kick. The main findings showed that kicks aiming at a breaking board were significantly slower than kicks without a physical target (maximal kick-foot velocities were 10.61 ± 0.86 m/s and 14.61 ± 0.67 m/s, respectively, p < 0.01), but the kicking time of the former was shorter (0.58 ± 0.01 s and 0.67 ± 0.01, respectively, p < 0.01). The results suggest that a physical target will negatively influence the kick-foot velocity, which is not necessarily a disadvantage for creating a high quality kick. Possible motor control mechanisms are discussed for the phenomenon. The study made it clear: trainings with and without physical targets would develop different motor control patterns. More studies are needed for identifying the effectiveness of different controls and efficiencies of their training.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 4; 115-120
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unikalne znaczenie wody chrzcielnej i jej wykradanie do praktyk magicznych przyczyną ewolucji formy chrzcielnicy i jej zabezpieczenia
    Baptismal font form evolution and protection of the place of baptism celebration resulting from the growing importance of baptismal water and instances of its stealing for sorcery rituals
    Autorzy:
    Nowiński, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/495281.pdf
    Data publikacji:
    2014-05-31
    Wydawca:
    Towarzystwo Naukowe Franciszka Salezego
    Tematy:
    chrzest
    chrzcielnica
    zabezpieczenie chrzcielnicy
    woda chrztu
    profanacja sakramentów
    czarna magia
    praktyki magiczne
    magiczne figurki z wosku
    The growing importance of baptismal water since the 3rd c
    emphasized in the ceremony of its blessing with holy oils (benedictio fontis) which occurred in the Early Middle Ages and Carolingian ceremonies
    developed the perception of baptismal water as a res sacra
    a holy item category
    turning it into unique matter
    Its presence in the baptismal font influenced the development of the shape and decoration of the baptismal vessel
    primarily by compositionally exposing the basin which clearly dominated the pedestal
    The holiness and the sanctifying power of the Sacrament matter were illustrated in the font basin decoration
    In the Middle Ages
    the sacramental matter of baptismal water was used in sorcery practices related to the so-called effigy magic (invultuatio)
    In order to enhance the magic power and identification with sorcery addressees
    wax figurines that represented them underwent a rite of sorcery Baptism being given the name of an individual a magic ritual was targeted at
    As a result
    baptismal water together with the consecrated oil of Chrism and oil of the Catechumens were stolen from churches
    Those sacrilege practices made the Church issue an order to keep baptismal fonts locked (sub clave)
    the latter resulting in various forms of preventing access to the baptismal font
    from simple lids strengthened with metal ferrules
    up to impressive conic ones
    with time becoming more and more artistically elaborate
    The problem of securing fonts remained open also in the post-Tridentine period
    Rituale Romanum issued in 1614 instructed to lock the fonts and fence them off with a closing balustrade
    transl
    Magdalena Iwińska
    baptism
    baptismal font
    baptismal font protection
    baptismal water
    Sacrament profanation
    black magic
    sorcery practices
    sorcery wax figurines
    Opis:
    The growing importance of baptismal water since the 3rd c., emphasized in the ceremony of its blessing with holy oils (benedictio fontis) which occurred in the Early Middle Ages and Carolingian ceremonies, developed the perception of baptismal water as a res sacra, a holy item category, turning it into unique matter. Its presence in the baptismal font influenced the development of the shape and decoration of the baptismal vessel, primarily by compositionally exposing the basin which clearly dominated the pedestal. The holiness and the sanctifying power of the Sacrament matter were illustrated in the font basin decoration. In the Middle Ages, the sacramental matter of baptismal water was used in sorcery practices related to the so-called effigy magic (invultuatio). In order to enhance the magic power and identification with sorcery addressees, wax figurines that represented them underwent a rite of sorcery Baptism being given the name of an individual a magic ritual was targeted at. As a result, baptismal water together with the consecrated oil of Chrism and oil of the Catechumens were stolen from churches. Those sacrilege practices made the Church issue an order to keep baptismal fonts locked (sub clave), the latter resulting in various forms of preventing access to the baptismal font: from simple lids strengthened with metal ferrules, up to impressive conic ones, with time becoming more and more artistically elaborate. The problem of securing fonts remained open also in the post-Tridentine period. Rituale Romanum issued in 1614 instructed to lock the fonts and fence them off with a closing balustrade.
    Źródło:
    Seminare. Poszukiwania naukowe; 2014, 35, 2; 175-191
    1232-8766
    Pojawia się w:
    Seminare. Poszukiwania naukowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer control and measuring system of HWZ-3 engine dynamometer
    Komputerowy system kontrolno-pomiarowy hamowni silnikowej HWZ-3
    Autorzy:
    Łukomski, M.
    Koszela, K.
    Przybył, K.
    Mueller, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/337176.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    engine dynamometer HWZ-3
    modernization
    power take-off dynamometer
    external characteristics
    wheeled tractor engine
    built-in systems
    Arduino platform
    modernizacja
    hamownia silnikowa HWZ-3
    hamownia wału odbioru mocy
    charakterystyka zewnętrzna
    silnik ciągnika kołowego
    systemy wbudowane
    platforma Arduino
    Opis:
    This article presents a project that contributed to the computerization of the obsolete measurement and control cabinet SPS1, which is part of a test stand designed to determine the parameters of the engine in wheeled tractors. The test stand is located in the Department of Energy Systems Engineering at the University of Life Sciences in Poznań. Arduino platform was used as a built-in system, which enabled the exchange of information between the computer and the measurement and control cabinet along with the readout of analogue meter readings and the control of the engine dynamometer brake load. In order to clearly display measured parameters, proprietary applications were developed in the .NET environment, which in real time presents the results and graphs the speed characteristics of the engine. The implementation was carried out without violating the design of the test station.
    Niniejszy artykuł przedstawia projekt, który przyczynił się do skomputeryzowania przestarzałej szafy pomiarowo-sterującej SPS-1, wchodzącej w skład stanowiska badawczego przeznaczonego do wyznaczania parametrów silnika w ciągnikach kołowych. Stanowisko badawcze znajduje się w Zakładzie Inżynierii Systemów Energetycznych Uniwersytetu Przyrodniczego w Poznaniu. Jako system wbudowany wykorzystano platformę Arduino, która umożliwiła wymianę informacji pomiędzy komputerem a szafą pomiarowo-sterującą wraz z odczytem wskazań analogowych mierników i sterowaniem obciążeniem hamulca hamowni silnikowej. W celu przejrzystego zobrazowania mierzonych parametrów opracowano autorską aplikację w środowisku .NET, która w czasie rzeczywistym prezentuje wyniki oraz wykreśla charakterystykę prędkościową silnika. Implementacja została przeprowadzona bez naruszania konstrukcji stacji badawczej.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2018, 63, 4; 114-116
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear PTO effect on performance of vertical axisymmetric wave energy converter using semi-analytical method
    Autorzy:
    Liu, M.
    Liu, H.
    Zheng, X.
    Chen, H.
    Wang, L.
    Zhang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/258878.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    wave energy converter (WEC)
    power take-off (PTO)
    capture width ratios
    analytical method
    eigen function
    Opis:
    The wave energy, as a clean and non-pollution renewable energy sources, has become a hot research topic at home and abroad and is likely to become a new industry in the future. In this article, to effectively extract and maximize the energy from ocean waves, a vertical axisymmetric wave energy converter (WEC) was presented according to investigating of the advantages and disadvantages of the current WEC. The linear and quadratic equations in frequency-domain for the reactive controlled single-point converter property under regular waves condition are proposed for an efficient power take-off (PTO). A method of damping coefficients, theoretical added mass and exciting force are calculated with the analytical method which is in use of the series expansion of eigen functions. The loads of optimal reactive and resistive, the amplitudes of corresponding oscillation, and the width ratios of energy capture are determined approximately and discussed in numerical results.
    Źródło:
    Polish Maritime Research; 2017, S 3; 49-57
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strength and fatigue numerical analysis of jointed-telescopic power take-off shaft
    Wytrzymałościowa i zmęczeniowa analiza numeryczna wału przegubowo-teleskopowego
    Autorzy:
    Kukiełka, K.
    Patyk, R.
    Kukiełka, L.
    Bohdal, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/334737.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    power take-off shaft
    strength analysis
    fatigue wear analysis
    numerical analysis
    wał przegubowo-teleskopowy
    analiza wytrzymałościowa
    analiza zmęczeniowa
    analiza numeryczna
    Opis:
    The aim of this work is to develop a numerical application to strength and fatigue numerical analysis of jointed-telescopic Power Take-Off shaft. Exemplary results for equivalent of stress in whole shaft and in a part of stress concentration are shown. Presented chart of changing of the number of the correct cycles operation of the PTO shaft depending on the torsional angle allows to predict a shaft life. From numerical analyses of process it follows that the numerically tested system can withstand the load associated with the vibration phenomena and is properly designed. Furthermore, it was found that the shaft at the maximum rotational operating speeds, is working at frequencies under resonance.
    Celem niniejszej pracy jest opracowanie aplikacji numerycznej do wytrzymałościowej i zmęczeniowej analizy numerycznej wału przegubowo-teleskopowego. Zamieszczono przykładowe wyniki dla naprężeń zredukowanych dla całego wałka oraz w miejscach ich koncentracji. Zaprezentowany wykres zależności liczby cykli pracy od kąta odchylenia widłaków pozwala na prognozowanie trwałości WPM. Z przeprowadzonych analiz numerycznych procesu wynika, że badany numerycznie układ wytrzymuje obciążenia związane ze zjawiskami drganiowymi i jest prawidłowo zaprojektowany. Ponadto, stwierdzono, że wał przy maksymalnych obrotowych prędkościach roboczych pracuje w częstotliwościach podrezonansowych.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2014, 59, 1; 77-82
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An example of a power-off maneuver of a vehicle without a straight line motion control
    Autorzy:
    Kisilowski, Jerzy
    Zalewski, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/1832920.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    vehicle dynamics
    power-off
    no motion control
    motion control
    dynamika pojazdu
    wyłączanie
    brak kontroli ruchu
    kontrola ruchu
    Opis:
    In this paper some selected results related to motor vehicle dynamics have been presented basing on the computer simulations of a sports two-seater performing a power-off straight line maneuver with different road conditions and the lack of a straightline motion control having been included. All simulations have been performed in the MSC Adams/Car environment and the adopted maneuver was performed at the instant speed of 100km/h-1. The selected phenomena have therefore been observed along the road long enough to relate them to different aspects of vehicle dynamics and the road traffic safety research. The adopted vehicle’s model moved along the flat and the randomly uneven road with the almost similar and the almost different profiles for the left and the right wheels. Additionally, two values of the coefficient determining the maxi-mum amplitude of road irregularities have been selected, i.e., 0.3 for the lower and 0.9 for the higher irregularities. This meant that the road conditions have been considered as one of the main factors possibly affecting disturbances of the motor vehicle’s motion. Such research seems valuable from the point of view of the road safety and the vehicles’ maintenance. A power-off straight maneuver is not very often performed during the normal road traffic and might seem useless. However, in this case it seemed essential to test the response of a vehicle’s model to such factors as, e.g., the uneven loading, suspension characteristics, etc. This in turn might prove valuable when considering, e.g., the additional concentration of a driver to overcome the external disturbances acting on a moving vehicle. The presented research is the second part of the paper (Kisilowski, 2019) where the power-off maneuver was considered but with the straightforward motion control. Here, the straight-line control has been switched off to examine an untypical situation where, for example a driver loses consciousness, and the vehicle moves freely along the road.
    Źródło:
    Archives of Transport; 2021, 58, 2; 63-80
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected aspects of motor vehicle dynamics on the example of a power-off straight line maneuver
    Autorzy:
    Kisilowski, Jerzy
    Zalewski, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/224116.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    motor vehicle dynamics
    power-off
    straight line maneuver
    traffic safety
    dynamika pojazdu samochodowego
    wyłączenie zasilania
    manewry po prostej
    bezpieczeństwo ruchu
    Opis:
    In this paper the selected phenomena related to motor vehicle’s motion have been considered basing on a computer simulation. The vehicle performed a power-off straight line maneuver with different road conditions being included. All simulations have been performed in the MSC Adams/Car environment based on the available sports two-seater vehicle model, realizing the adopted maneuver at the instant speed of 100km/h. This enabled observation of the selected phenomena along the road long enough to relate them to different aspects of vehicle dynamics research. As for the randomly uneven road, almost similar and almost different profiles have been assumed for the left and right wheels of the vehicle. Additionally, two values of the coefficient determining the maximum amplitude of road irregularities have been selected: 0.3 for lower and 0.9 for higher irregularities, so the road surface conditions along with the flat road have been considered as one of the factors causing disturbances of the motor vehicle motion. Such research seems valuable from the point of view of road traffic safety and vehicle maintenance. This specific example is a presentation of the possible research on vehicle dynamics as well as a potential background for further considerations including different types of vehicles along with almost different road profiles for the left and right wheels of the given vehicle model. A power-off straight maneuver is not performed very often in normal road traffic. However, such test could be valuable when analyzing influence of the selected motor vehicle parameters, such as uneven loading, suspension characteristics, etc. on such maintenance features as stability, steerability and the influence of external disturbances acting on the moving vehicle. Further research provides different maneuvers and different simulation conditions.
    Źródło:
    Archives of Transport; 2019, 50, 2; 57-76
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ parametrów pracy agregatu do orki na ekonomiczność silnika ciągnikowego
    Influence of mounted plough operation on the economy of tractor engine
    Autorzy:
    Havlíček, M.
    Bauer, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/287589.pdf
    Data publikacji:
    2005
    Wydawca:
    Polskie Towarzystwo Inżynierii Rolniczej
    Tematy:
    charakterystyka ogólna silnika
    jednostkowe zużycie paliwa
    wał mechanizmu odbioru mocy
    moc
    engine characteristics
    fuel consumption
    power take-off shaft
    Opis:
    W artykule porównano bilans zużycia oleju napędowego przez silnik ciągnika FEND FAVORIT 924 pracującego na dwóch polach w terenie. Stwierdzono różnice w zużyciu paliwa przy tej samej mocy silnika w zależności od jego prędkości obrotowej i ustawienia pompy wtryskowej. Wykazano, że poprawa ekonomiczności silnika ciągnikowego powinna przebiegać według modelu pracy silnika jakim jest charakterystyka ogólna.
    Results of a tractor plough testing are presented in this paper. Total power characteristic was measured in laboratory. Plough measures were taken in the field. Total fuel consumption, engine speed and the position of the injection pump control rod were measured. Two-engine operation modes were selected, thus both with the same power range, for showing the difference in the economic evaluation.
    Źródło:
    Inżynieria Rolnicza; 2005, R. 9, nr 3, 3; 197-201
    1429-7264
    Pojawia się w:
    Inżynieria Rolnicza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The desctiption of turn-off process and evaluation of switching power losses in the ultra fast power MOSFET
    Autorzy:
    Grzejszczak, P.
    Barlik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193214.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    power MOSFET
    turn-off transient
    parasitic capacitance
    switching losses
    thermovision measurement
    Opis:
    The article presents an analytical description of the turn-off process of the power MOSFET suitable for use in high-frequency converters. The purpose of this description is to explain the dynamic phenomena occurring inside the transistor and contributing to the switching power losses. The detailed description uses the results of simulation studies carried out using a very precise model of the CoolMOS transistor manufactured by Infineon (IPW60R070C6). The theoretical analysis has been verified in experimental measurements of power dissipated during turn-off transient of MOSFET operating in a full bridge converter with switching frequency of 100 kHz. To estimate these switching losses an original thermovision method based on the measurement of heat dissipated in the power semiconductor switches has been used. The obtained results confirm the correctness of the conclusions drawn from the theoretical analysis presented in this paper.
    Źródło:
    Power Electronics and Drives; 2016, 1, 36/1; 55-67
    2451-0262
    2543-4292
    Pojawia się w:
    Power Electronics and Drives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Starty i lądowania na ograniczonej wielkości lądowiska po awarii napędu
    Take-off and landing on a limited size landing ground following a power failure
    Autorzy:
    Głaz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/212496.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
    Tematy:
    start
    lądowanie
    lądowisko
    awarie napędu
    take-off
    landing
    power failure
    Opis:
    Obiektem badań jest śmigłowiec Mi-2 plus, dla którego należy opracować technikę sterowania po awarii napędu w czasie wykonywania "pionowych " startów i lądowań na krótkich lądowiskach. Do punktów krytycznych, które należy przeanalizować w badaniach techniki wykonania startów i lądowań na ograniczonym lądowisku należą, przede wszystkim, problem przelotu przez pierścień wirowy oraz problem występowania strefy H-V. Należy wziąć także pod uwagę występowanie przeszkód na terenie lądowiska (zakłada się wysokość przeszkód do około 20 m). W opracowaniu zostały zamieszczone symulacje obliczeniowe sterownia śmigłowcem Mi-2 plus po awarii silnika (dla różnych wysokości wystąpienia awarii). Przedstawiono sposób sterownia pochyleniem kadłuba oraz wartością kąta skoku ogólnego pozwalający na uzyskanie określonych trajektorii lotu. Zamieszczono również niektóre wyniki z prób w locie przeprowadzonych w PZL Świdnik S.A. Na podstawie przeprowadzonych symulacji i badań lotnych stwierdzono, iż istnieje możliwość bezpiecznego wykonania manewrów "pionowych " startów i lądowań.
    The object of the tests is the Mi-2 Plus helicopter, for which a method of controlling the helicopter after a power failure during vertical take-off and landing on short landing ground should be designed. The problems of flight through the vortex ring and occurrence of the H-V zone belong to the critical points, which should be analyzed in tests of the method of take-off and landing on a short landing ground. The occurrence of obstacles on the area of the landing ground should also be taken into account (the height of the obstacles is assumed to be up to around 20m). In the development of the tests, numerical simulations of controlling the Mi-2 Plus helicopter after engine failure (for varying height at which the failure took place) were included. A method of control through the inclination of the fuselage as well as the value of the rotor tilt angle, which allows for certain flight trajectories to be obtained, was introduced. Included also were certain results from flight tests carried out at PZL Świdnik S.A. On the basis of the simulations performed and flight tests, it was decided that there exists a possibility of safely performing "vertical" take-off and landing manoeuvres.
    Źródło:
    Prace Instytutu Lotnictwa; 2006, 1-2 (184-185); 119-122
    0509-6669
    2300-5408
    Pojawia się w:
    Prace Instytutu Lotnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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