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Modeliranje in krmiljenje sistemov magnetne levitacije
ID Reznichenko, Igor (Author), ID Podržaj, Primož (Mentor) More about this mentor... This link opens in a new window, ID Peperko, Aljoša (Comentor)

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Abstract
Ta doktorska disertacija se ukvarja z večciljno optimizacijo magnetnih levitacijskih sistemov. Za pomoč pri tem procesu je bil razvit nov algoritem za obdelavo prehodne funkcije. S spreminjanjem časovnega koraka algoritma glede na značilnosti krivulje se doseže večja hitrost obdelave signalov, kar potrjujejo numerični testi. Algoritem je uporaben tudi za dinamične sisteme delnega reda, za katere je bila izpeljana eksplicitna formula za inverzno Laplaceovo transformacijo splošnega tipa prenosnih funkcij. Natančno določanje magnetnih polj 3D-objektov je pomemben del modeliranja levitacijskih sistemov. To delo formulira in rešuje problem iskanja stacionarnega magnetnega polja 3D-objekta na kateri koli točki v prostoru na podlagi znanih vrednosti magnetnega polja blizu površine magnetiziranega predmeta. Za večplastni solenoid so bile izpeljane nove kompaktne analitične formule za dvižno silo in njene odvode. Z uporabo teh formul so bile primerjane optimalne geometrije tuljav, pridobljene z več negladkimi metodami iskanja minimuma.

Language:Slovenian
Keywords:magnetna levitacija, teorija krmiljenja, analiza prehodne funkcije, metahevristični algoritmi, diferencialni sistemi delnega reda, metoda robnih elementov, magnetna polja, Laplaceova enačba
Work type:Doctoral dissertation
Typology:2.08 - Doctoral Dissertation
Organization:FS - Faculty of Mechanical Engineering
Place of publishing:Ljubljana
Publisher:[I. Reznichenko]
Year:2026
Number of pages:XX, 178 str.
PID:20.500.12556/RUL-184326 This link opens in a new window
UDC:681.527.7:681.511(043.3)
COBISS.SI-ID:283884547 This link opens in a new window
Publication date in RUL:04.07.2026
Views:100
Downloads:83
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Secondary language

Language:English
Title:Modelling and control of magnetic levitation systems
Abstract:
This thesis is concerned with multi-objective optimization of magnetic levitation systems. To assist with this process, a new algorithm for processing step response signals was developed. By varying the algorithm’s time step depending on the characteristics of the curve, it achieves increased signal processing speed, which is confirmed by numerical tests. The algorithm is also applicable to fractional-order dynamical systems for which an explicit formula for the inverse Laplace transform of a general type of transfer functions was derived. Accurate determination of magnetic fields of 3D objects is an important part of modeling of levitation systems. This work formulates and solves the problem of finding the stationary magnetic field of a 3D object at any point in space based on known values of the magnetic field near the surface of a magnetized object. For a multilayered solenoid, new compact analytical formulas of the lifting force and its derivatives were derived. Using these expressions, the optimal coil geometries, acquired with several nonsmooth minimum search methods, were compared.

Keywords:magnetic levitation, control theory, step response analysis, metaheuristic algorithms, fractional-order analysis, boundary element method, magnetic fields, Laplace equation

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