Experimental measurements of levitation force generated by high-temperature superconductors in magnetic field

Sibilska-Mroziewicz, Anna; Ładyżyńska-Kozdraś, Edyta; Falkowski, Krzysztof; Wolski, Krzysztof; Credo, W.; Skalski, Andrzej

doi:10.1007/978-3-319-23923-1_38

Cited by 3 publications

(4 citation statements)

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“…The value of the levitation force and torque depends on the intensity and direction of the magnetic field at a given point in the space and the position and orientation of the levitating superconductors [8,9]. On the superconductors lying inside of the carts supports acts the levitation force resulting from the Meissner effect , directed perpendicular to the tracks.…”

Section: Levitation Forces and Torques / Levitacijske Sile I Zakretnimentioning

confidence: 99%

“…The remaining components of levitation force , , can be divided into analogous components. The resultant levitation force acting on the cart is the sum of the forces acting on its four supports: (8) The developed model assumes, that the torque resulting from the flux trapping effect has only one non-zero component with respect to the x m axis, which for example for is described by the dependence:…”

Section: Levitation Forces and Torques / Levitacijske Sile I Zakretnimentioning

confidence: 99%

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Modelling of Forces Acting on a System of the UAV Launcher, Based on Passive Magnetic Suspensions with Superconductors

2020

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Modern sea operations used for exploration and reconnaissance purposes are becoming more and more dependent on unmanned air vehicles (UAV). With the development of an increasing number of UAVs directed to the needs of the navy, various takeoff and landing systems are being tested. An alternative to the traditionally used catapults is magnetic catapults, which enable continuous power control, properly increasing the acceleration of the starting machine and at the same time enabling full automation of the launching process. The paper presents the developed of the physical model and theoretical analyzes the forces and torques acting on the launcher system using passive magnetic suspensions with high-temperature superconductors. The launcher was modeled as a configuration of three elements: tracks built from neodymium magnets generating the magnetic field, a starting cart driven by a linear engine and a UAV taking off or landing on the launcher cart. The set of assumptions regarding the characteristics of the environment, the structure of the system elements, kinematic constraints were made. The article consists also the theoretical analysis of external interactions having a decisive influence on the dynamics of the system. The analysis considers the couplings resulting from mutual interactions of individual elements of the system. Theoretical considerations were supplemented with a comparative analysis of numerical and experimental studies of the UAV launch process from the launcher which allowed the verification of the key parameters of the analyzed forces. Sažetak Moderne pomorske operacije korištene za eksploataciju i izviđanje na moru postaju sve više ovisne o vozilima bez posade (UAV). Razvojem povećanoga broja UAV-a, koji su usmjereni na potrebe mornarice, testiraju se različiti sustavi polijetanja i slijetanja. Alternativa tradicionalno upotrijebljenim katapultima magnetski je katapult, koji omogućava neprekidnu kontrolu snage, pravilno povećavajući akceleraciju početnoga stroja i istodobno omogućuje potpunu automatizaciju procesa lansiranja. Članak predstavlja razvoj fizičkoga modela i teoretski analizira sile i zakretne momente koji djeluju na sustav lansiranja koristeći pasivnu magnetsku suspenziju sa superprovodnicima visoke temperature. Lanser je modeliran kao konfiguracija triju elemenata: trake napravljene od neodimium magneta koji proizvodi magnetsko polje, početnih kola koja pokreće linearni stroj te UAV-a koji polijeće ili slijeće na lansirna kola. Postavljen je set pretpostavki koje se tiču karakteristika okoliša, struktura sustava elemenata i kinematskih ograničenja. Članak se također sastoji od teoretske analize i eksternih interakcija, koje imaju odlučujući utjecaj na dinamiku sustava. Analiza razmatra parove koji rezultiraju iz uzajamnih interakcija individualnih elemenata sustava. Teoretska razmatranja nadopunjena su komparativnom analizom numeričkih i eksperimentalnih studija procesa lansiranja UAV-a s lansera koji je dopustio verifikaciju ključnih parametara analiziranih sila. KEY WORDS phys...

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Section: Levitation Forces and Torques / Levitacijske Sile I Zakretnimentioning

confidence: 99%

Section: Levitation Forces and Torques / Levitacijske Sile I Zakretnimentioning

confidence: 99%

Modelling of Forces Acting on a System of the UAV Launcher, Based on Passive Magnetic Suspensions with Superconductors

2020

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“…Another example of electromagnetic launcher can be testbench developed as part of 7EU FP project GABRIEL [38] in Wroclaw University of Technology, (Chair of Cryogenic, Aerospace, and Processing Engineering). This launcher uses 10 meters length magnetic track and high temperature superconductors in Magnetic Levitation (MAGLEV) suspension system of the sledge [8,9,21,37]. [16,17]; b) the high temperature superconductors magnetic levitation track for UAVs take-off and landing developed in Wroclaw University of Technology as a part of the GABRIEL project [38] The construction of the electromagnetic launcher ( fig.…”

Section: Formation Flightmentioning

confidence: 99%

“…The model of magnetic suspension system with superconductor consists of magnetic rails and boxes with superconductors. There was performed verification numerical model by the analysis of the Meissner's effect [8,9,21,37]. Two variants of magnetic rails architecture are investigated.…”

Section: Formation Flightmentioning

confidence: 99%

Towards implementation of a formation flying for efficient UAV operations

et al. 2018

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A flight of a UAV formation is an efficient way to implement surveillance and reconnaissance operations. The usage of a few UAVs as a formation instead of a single vehicle allows creating a distributed network of sensors, which decreases the duration of flight missions and enlarges a total field of view. From a practical point of view, implementations of formation flights require taking into account several separate aspects of flight of UAV such as a quick take-off of several aircraft, aggregating all UAVs in the same space to create swarm and collective flight of the formation towards the area of a surveillance mission. The paper presents the results of researches and experiments carried out towards practical solutions to those aspects. A magnetic launcher is an excellent appliance to put UAV in the air, and its operation could be repeated quickly. Hence, it is ideal to be used in a formation flight. The leader-follower approach based on two-stage switching control is an effective method to aggregate UAVs in the same space while they are flying over large areas. Whereas, the decentralized control of aerial flocking can be used to achieve a coherent flight of UAV formation, which is able to self-organize. Results from simulations and experiments show the effectiveness of each presented aspect and prove their usability in the implementation of formation flights.

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