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Tytuł:
Disc-shaped LIM for levitation and traction force control powered by the source using the component synchronous with the motor speed
Autorzy:
Morizane, T.
Tsuruya, K.
Kimura, N.
Omori, H.
Powiązania:
https://bibliotekanauki.pl/articles/141445.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
linear induction motor
magnetically levitation
traction and levitation control
disc-shaped LIM
Opis:
It has been proposed that a novel maglev transport system uses both of the attractive force and thrust force of the Linear Induction Motor (LIM). In our proposal, these two forces will be controlled by two different frequency components. One of the frequency components is synchronous with the motor speed (fm). Another frequency component is drive frequency (fd). Our proposed system enables the independent and simultaneous control of the attractive and thrust force of LIM. Each value of the attractive and the thrust force generated by fm and fd must be identified in order to design that LIM control system. For these purpose, a disc-shaped LIM has been developed as an experimental equipment. The force profiles, especially around zero slip, have been analyzed under experimental conditions.
Źródło:
Archives of Electrical Engineering; 2015, 64, 4; 571-580
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability test of Hyperloop vehicle in different movement conditions
Autorzy:
Kowalik, Rafał
Kisilowski, Jerzy
Łusiak, Tomasz
Gil, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/27312782.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
stability
hyperloop vehicle
magnetic levitation
Opis:
The guide of the Hyperloop system in the paper is mathematically represented as a continuous system along which the force from the capsule travels, with the capsule in turn represented as a discrete system. The simulations discussed in the article were used to determine the displacements of the magnet elements. ANSYS software was used to perform the simulations using finite element calculations (FEM). The stability of the capsule will be determined from the results of the displacements present in the system. Taking into account the existing conditions in the magnet and guide assembly system, the simulation results were used to analyse stability in technical and stochastic terms (Lyapunov criteria) for non-linear systems. In the technical stochastic stability analysis, the transverse displacements of the electromagnets were used. The probability of unstable Hyperloop motion was then calculated.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 169204
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical Model of Large-Scale Levitation Melting Process
Autorzy:
Golak, S.
Panic, B.
Powiązania:
https://bibliotekanauki.pl/articles/353756.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
levitation melting
reactive metals
numerical modelling
Opis:
The levitation melting has a potentially wide range of applications, especially in the processing of reactive metals whose contact with the crucible material causes their contamination and damage to the crucible itself. Despite its advantages, levitation melting, already proposed in the 1920s, has not yet found significant use in industrial conditions. This is due to the nature of the electromagnetic field used in previously developed devices. The disappearance of this field in the system axis causes overcoming, in the case of larger charges, surface tension forces and metal leakage from the device. The article contains a comparative analysis of a conventional solution and a newly developed levitation melting device, whose completely different design eliminates the previous weight limit of the charge.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 627-632
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flight path optimization of an aircraft aided during take-off by maglev system
Autorzy:
Majka, A.
Powiązania:
https://bibliotekanauki.pl/articles/245029.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
air transport
magnetic levitation
trajectory optimization
Opis:
Very high air traffic density in the largest airports and in their vicinity involves that the air traffic in the largest airports and their areas of operations approaches the capacity limits. Such high density of the air traffic adversely influences the natural environment in the vicinity of the airports due to the increasing cumulative noise level and the concentration of environmentally hazardous substances. One of the possibilities to improve the situation is to work out innovative solutions aimed at decreasing the aircraft pollution and improving the transport effectiveness. One of the major concepts is using magnetic levitation (MAGLEV) technology to support aircraft take-off and landing. If the aircraft could take-off and start the initial climb phase with the ground power, the installed power may be reduced, resulting in less weight, less drag and less overall fuel consumption which leads to emission reduction. These advantages, the lower fuel consumption and emissions, increase sustainability of the transportation system. Different conditions of the take-off give possibilities to shape the trajectory after the take-off in order to decrease the negative influence on the environment. The aim of the present work was to determine the optimal conditions of the take-off and the optimal climb trajectory of the aircraft aided in the ground phase of the take-off by the system using the MAGLEV technology, minimizing the fuel consumption. The simplified algorithm of optimization of the flight trajectory was used in this work; it uses the method of approximation of the flight path by the third degree polynomial.
Źródło:
Journal of KONES; 2013, 20, 2; 261-268
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel control-rod drive mechanism via electromagnetic levitation in MNSR
Autorzy:
Divandari, M.
Hashemi-Tilehnoee, M.
Khaleghi, M.
Hosseinkhah, M.
Powiązania:
https://bibliotekanauki.pl/articles/147631.pdf
Data publikacji:
2014
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
magnetic levitation system
nuclear reactor
state feedback
tracking
Opis:
In this paper, an electromagnetic levitation system was used with a synchronous motor to navigate the control rod of a small-type research reactor. The result from this prototype magnetic levitation system was in agreement with simulation results. The control system was programmed in MATLAB through open-loop system, closed-loop with state feedback and closed-loop with state feedback integral tracking. The final control system showed the highest performance with a low positioning error. Our results showed that the developed control system has the potential to be used as a reliable actuator in nuclear reactors to satisfy higher performance and safety.
Źródło:
Nukleonika; 2014, 59, 2; 73-79
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the required ground power of a ground - based system for support of the aircraft safe take - off and landing
Autorzy:
Majka, A.
Powiązania:
https://bibliotekanauki.pl/articles/242165.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
air transport
take-off and landing
magnetic levitation
Opis:
Among the most important problems faced by the air transport today there can be mentioned some negative influences of aircraft and airports on the environment and the increasing costs of air transport. One of the possibilities to improve the situation is to work out innovative solutions aimed at decreasing of the aircraft pollution and improving the transport effectiveness. Among the most innovative ideas is the use of magnetic levitation to aid the take-off and landing of the transport aircraft. The use of the aiding system will bring a lot of benefits, however, regarding its innovative character and the problems connected with it, the idea can have been realized in a couple of years or even decades. The aim of this work was to carry out the analysis of the change to the required thrust of the transport aircraft in the take-off, landing and cruise using the system of magnetic levitation. Magnetic levitation or magnetic suspension is a method by which a body floats due to a special quality of magnets. The generated electromagnetic force is used to balance the weight of the object. The current work describes the ways of determining the weights of the main systems of the aircraft with classical construction solutions where the weight of the whole aircraft is estimated on the basis of the statistical methods. It allows determining the weights of all main systems of the aircraft and verifying the results using the known examples. Thanks to this approach, it could be possible to determine the modified aircraft weight more thoroughly, adding the changes in weights of the modified systems.
Źródło:
Journal of KONES; 2012, 19, 4; 411-418
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control and Operation of a Hybrid Actuator for Maglev Applications
Autorzy:
Rickwärtz, Jan Philipp
Kolb, Johann
Franck, Marius
Hameyer, Kay
Powiązania:
https://bibliotekanauki.pl/articles/1955978.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Maglev
electromagnetic levitation
controlled permanent magnet
hybrid actuator
Opis:
The hybrid actuator presented in this article is meant to enable stationary and slow dynamic levitation in Maglev applications. The term 'hybrid' refers to the design of the actuator, which is a combination of permanent magnets (PM) and electromagnets. This paper presents an analytically computable control algorithm for the said hybrid actuator. The theory of magnetic circuits is summarized shortly and used to derive a cascaded control loop consisting of an inner current controller and an outer air gap controller. Since the uncontrolled hybrid actuator is inherently unstable, the system has to be stabilized. By introducing a PID-controller into the air gap control loop, the unstable behaviour of the uncontrolled system is changed into the system behaviour of a damped harmonic oscillator. The advantage of this approach is that the computed controller parameters of the PID-controller can easily be adjusted, so the system behaviour of damping and eigenfrequency can be selected within a certain range. For the execution of the control algorithm, a microcontroller (MCU) is used and for precise air gap measurement, an eddy current sensor is installed. Finally, the behaviour of the current- and air gap controller is discussed for different measurement results and the adjustable system behaviour of the damped harmonic oscillator is presented.
Źródło:
Power Electronics and Drives; 2021, 6, 41; 128-143
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhanced IMC synthesis for tracking control of magnetic levitation system
Autorzy:
Elumalai, V. K.
Subramanian, R. G.
Reddipogu, J. S. D.
Srinivasan, S.
Agrawal, S.
Powiązania:
https://bibliotekanauki.pl/articles/140742.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
IMC
magnetic levitation
time delay
Q-parameterization
robustness
Opis:
This paper presents an enhanced internal model control (EIMC) scheme for a time-delayed second order unstable process, which is subjected to exogenous disturbance and model variations. Even though the conventional internal model control (IMC) can provide an asymptotic tracking response with desired stability margins, the major limitation of conventional IMC is that it cannot be applied for an unstable system because a small exogenous disturbance can trigger the control signal to grow unbounded. Hence, modifying the conventional IMC structure to guarantee the internal stability, we present an EIMC scheme which can offer better trade-off between setpoint tracking and disturbance rejection characteristics. To improve the load disturbance rejection characteristics and attenuate the effect of sensor noise, we solve the selection of controller gains as an H∞ optimization problem. One of the key aspects of the EIMC scheme is that the robustness of the closed loop system can be tuned via a single tuning parameter. The performance of the EIMC scheme is experimentally assessed on a magnetic levitation plant for reference tracking application. Experimental results substantiate that the EIMC scheme can effectively counteract the inherent time delay in the model and offer precise tracking, even in the presence of exogenous disturbance. Moreover, by comparing the trajectory tracking performance of EIMC with that of the proportional integral velocity (PIV) controller through cumulative power spectral density (CPSD) of the tracking error, we show that the EIMC can offer better low frequency servo response with minimal vibrations.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 293--306
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Search for the most useful geometry of an acoustic journal bearing
Poszukiwania najkorzystniejszej geometrii panwi poprzecznego łożyska akustycznego
Autorzy:
Gawarkiewicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/191067.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
air journal bearing
acoustic levitation
ultrasonic levitation
theoretical investigation
experimental validation
poprzeczne łożysko gazowe
lewitacja akustyczna
lewitacja ponaddźwiękowa
badania teoretyczne
weryfikacja doświadczalna
Opis:
Computer simulations of a number of journal bearing’s geometries utilising acoustic levitation were carried out. The choice of the best geometry depended on the ability of a deformed shape, created by piezo-electric elements, to facilitate squeeze film ultrasonic levitation, and also to create three evenly distributed diverging aerodynamic gaps. Deformations of analysed variants of the bearing’s shape were generated by numerical simulations utilising the finite element method. For the chosen shapes of geometry, prototype bearings were made and their usefulness verified experimentally. As a result, the bearing with the highest load carrying capacity was identified.
Przeprowadzono analizę użyteczności szeregu geometrii panwi łożyska poprzecznego wykorzystującego lewitację akustyczną. Wybór najlepszego z przeanalizowanych rozwiązań zależał od zdolności do uzyskiwania kształtu jego powierzchni czynnej sprzyjającego powstaniu ponaddźwiękowej lewitacji akustycznej (wykorzystującej efekt „wyciskania” filmu smarnego), a także umożliwiającego tworzenie zbieżnych równomiernie obwodowo rozmieszczonych szczelin smarnych, które były warunkiem powstawania filmu aerodynamicznego. Kształt części czynnej łożyska zależał od jej deformacji wywoływanej elementami piezoelektrycznymi. Spodziewane deformacje poszczególnych wariantów panwi otrzymywano na drodze symulacji numerycznych wykorzystujących metodę elementów skończonych. Dla wytypowanych geometrii wykonano prototypy łożysk, których przydatność zweryfikowano podczas badań doświadczalnych. Ostatecznie udało się uzyskać postacie panwi łożyskowej o bardzo dużej stabilności pracy, nawet w warunkach impulsowego obciążenia poprzecznego.
Źródło:
Tribologia; 2017, 273, 3; 57-66
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Search of an Inducer Geometry that is Beneficial for Lifting Parameters of a Lifted Object of a Selected Shape
Poszukiwanie geometrii wzbudnika korzystnego dla parametrów unoszenia obiektu o wybranym kształcie
Autorzy:
Bastian, Bartosz
Gawarkiewicz, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/189402.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
acoustic levitation
modal analysis
CFD
lewitacja akustyczna
analiza modalna
Opis:
The literature describes acoustic levitation phenomena with the utilization of air squeeze film between the vibrating inducer and the lifted object. The objective of the study is to determine the shape of the inducer with vibration characteristics that would allow the levitation of an object of the assumed geometry. In this paper, the influence of the dimension ratio of the inducer on the frequency of the first mode of vibration was presented. CFD calculations for a selected dimension series were performed with the goal of the determination of lifting conditions. The data obtained from the analysis will be used to manufacture an inducer that will serve as an experimental verification for the fluid dynamics calculation.
W literaturze opisywane jest zjawisko lewitacji akustycznej z wykorzystaniem efektu wyciskania powietrza ze szczeliny między drgającym wzbudnikiem a unoszonym obiektem. Celem badań jest znalezienie takiego kształtu wzbudnika, którego charakterystyka drgań pozwalałaby na lewitację obiektu o założonej geometrii. W opracowaniu określono wpływ wymiarów wzbudnika na kształt oraz częstotliwość jego pierwszej postaci drgań własnych. Dla wybranego przypadku wykonano symulacje CFD w celu określenia warunków unoszenia. Uzyskane wyniki analiz posłużą do wykonania wzbudnika w celu przeprowadzenia weryfikacyjnych badań eksperymentalnych.
Źródło:
Tribologia; 2019, 287, 5; 13-17
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of inductance matrixes of bearingless electric motor for magnetic levitation
Wyznaczanie parametrów macierzy indukcyjności bezłożyskowego silnika elektrycznego
Autorzy:
Falkowski, K.
Henzel, M.
Powiązania:
https://bibliotekanauki.pl/articles/276809.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
silnik bezłożyskowy
lewitacja magnetyczna
bearingless motor
magnetic levitation
induction
Opis:
The paper deals with mathematical and experimental analysis of induction in bearingless electric motor. The motor are used magnetic levitation phenomenon to bearing of the rotor. In stator are implemented two winding groups. These are bearing and motor windings. In the paper are presented the mathematical model of windings and the experimental results of induction parameter measurements.
Prowadzone obecnie w WAT prace badawcze stanowią odpowiedź na rozwój technologii More Electric Aircraft. W artykule przedstawiono wyniki analizy matematycznej macierzy indukcyjności dla bezłożyskowych silników dwu i trójfazowych. Uzyskane podczas tej analizy wyniki zostały zwerynkowane podczas badań laboratoryjnych. W tym celu dokonano pomiarów elektrycznych statorów obu silników oraz parametrów indukcyjności w funkcji szczeliny powietrznej.
Źródło:
Pomiary Automatyka Robotyka; 2013, 17, 2; 503-507
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy recovery from a non-linear electromagnetic system
Autorzy:
Kęcik, K.
Powiązania:
https://bibliotekanauki.pl/articles/386921.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
magnetic pseudo-levitation
energy harvesting
vibration
electromagnetic coupling
attractor coexistence
Opis:
The paper presents study of a pseudo-magnetic levitation system (pseudo-maglev) dedicated for energy harvesting. The idea rely on motion of a pseudo-levitating magnet in a coil’s terminal. The study based on real prototype harvester system, which in the pendulum dynamic vibration absorber is applied. For some parameters, the stability loss caused by the period doubling bifurcation is detected. The coexistence of two stable solutions, one of which is much better for energy harvesting is observed. The influence of the pseudo-maglev parameters on the recovered current and stability of the periodic solutions is presented in detail. The obtained results show, that the best energy recovery occurs for the high pseudo-maglev stiffness and close to the coil resistance. The amplitude’s excitation, the load resistances and the coupling coefficient strongly influence on the system’s response.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 1; 11-18
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimum emission unconventional MAGLEV assisted take-off
Autorzy:
Majka, A.
Powiązania:
https://bibliotekanauki.pl/articles/246124.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
air transport
green trajectory
take-off
aircraft emission
magnetic levitation
Opis:
Among the most important problems faced by the air transport today there can be mentioned some negative influences of aircraft and airports on the environment and the increasing costs of air transport. One of the possibilities to improve the situation is to work out innovative solutions aimed at decreasing of the aircraft pollution and improving the transport effectiveness. Among the most innovative ideas is the use of magnetic levitation (MAGLEV) to aid the take-off and landing of the transport aircraft. The “Integrated Ground and on-Board system for Support of the Aircraft Safe Take-off and Landing” – GABRIEL, deals with radically new integration of the MAGLEV technology into the air transportation system that contains aircraft, airport, air traffic control, authority, logistic and operational support, maintenance, etc. GABRIEL idea includes operation of the aircraft without the conventional undercarriage system and using the ground based power and supporting systems for take-offs and landings. In case of using the GABRIEL system as a catapult, the aircraft on the track must be accelerated to the speed permitting to reach the altitude of 300 m or more. Such take-off and climb results in minimum noise and minimal emission of substances harmful for the environment. After reaching the altitude of 300 m, the aircraft may follow its flight with using different flight strategies. Different conditions of the unconventional take-off needs to shape other way the trajectory of the initial stage of the aircraft flight after the lift-off. The aim of the present work was to determine the optimal conditions of the lift-off and the optimal trajectory of the initial climb minimizing the emission. Simplified realization of the Ritz- Galerkin method was used in this work, which uses an approximate solution to boundary value problems for determining the optimal flight trajectory.
Źródło:
Journal of KONES; 2014, 21, 4; 335-342
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An observer for magnetic levitation system control based on a coefficient diagram method and backstepping
Autorzy:
Haouari, F.
Bali, N.
Tadjine, M.
Boucherit, M. S.
Powiązania:
https://bibliotekanauki.pl/articles/141513.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
backstepping
coefficients diagram method controller
magnetic levitation system
nonlinear observer
Opis:
In this paper, we propose a robust nonlinear control design concept based on a coefficient diagram method and backstepping control, combined with a nonlinear observer for the magnetic levitation system to achieve precise position control in the existence of external disturbance, parameters mismatch with considerable variations and sensor noise in the case, where the full system states are supposed to be unavailable. The observer converges exponentially and leads to good estimate as well as a good track of the steel ball position with the reference trajectory. A simulation results are provided to show the excellent performance of the designed controller.
Źródło:
Archives of Electrical Engineering; 2018, 67, 2; 403--417
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extending Lyapunov redesign method for robust stabilization of non-affine quadratic polynomial systems
Autorzy:
Binazadeh, T.
Rahgoshay, M.
Powiązania:
https://bibliotekanauki.pl/articles/205649.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
Lyapunov redesign
non-affine
quadratic polynomial systems
magnetic ball levitation system
Opis:
The Lyapunov redesign method is basically used for robust stabilization of nonlinear systems with an affine structure. In this paper, for the first time, by suggestion of a simple but effective idea, this approach is developed for robust stabilization of non-affine quadratic polynomial systems in the presence of uncertainties and external disturbances. In the proposed method, according to the upper bound of an uncertain term, a quadratic polynomial is constructed and with respect to the position of the roots of this polynomial, the additional feedback law is designed for robustness of the quadratic polynomial system. The proposed technique is also used for robust stabilizing of a magnetic ball levitation system. When the coil current is the control input of the magnetic ball levitation system, equations of this system are increasingly nonlinear with respect to control input and have quadratic polynomial structure. The effectiveness of the proposed control law is also demonstrated through computer simulations.
Źródło:
Control and Cybernetics; 2016, 45, 3; 373-384
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
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