Browsing by Author "Novák Miroslav"
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- ItemAnalysis of the Electrospinning Process(AMOS repro Ltd, 2014-01-01) Svoboda Přemysl; Pokorný Pavel; Novák Miroslav
- ItemAnalysis of tram DC traction motors pairing(2016-01-01) Novák Miroslav; Ferková Želmíra
- ItemApparatus for Feedback Control of Electrospinning Process(University of West Bohemia, 2014-01-01) Svoboda Přemysl; Pokorný Pavel; Novák Miroslav; Bubla Viktor
- ItemApplication of Preisach Model to Low Loss Ferromagnetic Materials(Institute of Measurement Science, Slovak Academy of Sciences, 2015-01-01) Eichler Jakub; Košek Miloslav; Novák Miroslav
- ItemComplete set of HW and SW tools for arrangement of autonomous energy data colection from trolley traction and their continual analyse(2017-01-01) Novák Miroslav; Kubín Jiří; Richter Aleš
- ItemComplex dystem for monitoring state and control of tramway car service intervals(2015-01-01) Černohorský Josef; Kolář Josef; Kubín Jiří; Novák Miroslav
- ItemComputation Speed of Numeric Preisach Model(2017-01-01) Eichler Jakub; Novák Miroslav; Košek Miloslav
- ItemContinuous report for project TA04030145 for year 2016(2016-01-01) Richter Aleš; Novák Miroslav; Kubín Jiří; Jandura Pavel; Hubka Lukáš; Randák Jiří
- ItemContinuous report of projekt TA04030145 for year 2015(2015-01-01) Kubín Jiří; Richter Aleš; Novák Miroslav; Hubka Lukáš; Randák Jiří
- ItemContinuous report of projekt TA0403145 for year 2014(2014-01-01) Kubín Jiří; Richter Aleš; Randák Jiří; Novák Miroslav
- ItemDifferences between Preisach Model and Experiment for Soft Ferromagnetic Materials, Effect of Instrument Accuracy(Mondragon Unibertsitateko Zerbitzu Editoriala Loramendi kalea,, 2017-01-01) Eichler Jakub; Novák Miroslav; Košek MiloslavThe practical use of Preisach hysteresis model is based on proper identification of weighting function that characterizes the material. Obtaining of the weighting function needs two partial derivations of two-dimensional flux density function, called Everett surface, measured by specific procedure. Since the derivatives require exact measurements, the possible source of errors are studied. Main method is to compare experimental results and simulation. The comparison showed that the excitation current source accuracy influences the quality of Everett surface. Also the numeric integration drift plays an important role. The random or systematic failure in excitation current results in the minor secondary loops on the main hysteresis loop. Simulations of these effects confirmed the predicitons. As practical output it was found that the errors in excitation can be reduced by repeated measurements. The drift can be eliminated, if a more suitable wavefrom is used.
- ItemDifficulties Caused by Magnetic After-effect during Identification of the Preisach Hysteresis Model Weighting Function(POLISH ACAD SCIENCES INST PHYSICS, 2019-01-01) Novák Miroslav
- ItemDifficulty in identification of Preisach hysteresis model weighting function using first order reversal curves method in soft magnetic materials(Elsevier BV, 2017-01-01) Eichler Jakub; Novák Miroslav; Košek MiloslavThe Preisach model can be used for detailed analysis of devices based on ferromagnetic materials, if its parameter, its weighting function, is well-known. Usually the weighting function is approximated by analytical formula. The second approach is to determine it directly from experimental data. Most widely used method to obtain the weighting function is the first order reversal curve method that is based on two partial derivatives of measured magnetization using a special excitation pattern beginning from deep material saturation. Since the derivative enhances the experimental error, a precision experiment is necessary. Furthermore, it is not easy to achieve the deep saturation with the required signal pattern. Therefore sophisticated data processing followed, in order to reduce experimental errors before performing the numerical derivative. The paper concerns measurements errors caused by insufficient saturation and also problems of negative values of the weighting function, partially due to the noise. Irrespective of measurement errors, the agreement between model and experiment is good and fully acceptable in technical praxis.
- ItemEffective Approximation of Transfer Characteristics of Low Frequency Amplifier(University of West Bohemia, 2014-01-01) Novák Miroslav; Košek Miloslav; Eichler Jakub
- ItemElektrotechnika(Technická univerzita v Liberci, 2014-01-01) Novák Miroslav; Konečná Eva
- ItemElektrotechnika – příklady(Technická univerzita v Liberci, 2014-01-01) Novák Miroslav; Konečná Eva
- ItemExperimental Determination of the Preisach Model for Grain Oriented Steel(POLISH ACAD SCIENCES INST PHYSICS, 2019-01-01) Eichler Jakub; Novák Miroslav; Košek Miloslav
- ItemExperimental-numerical method for identification of weighting function in Preisach model for ferromagnetic materials(Západočeská univerzita v Plzni, 2016-01-01) Eichler Jakub; Novák Miroslav; Košek Miloslav
- ItemFeasibility study of mobile robot in spinnig machine space - robot no.2(2015-01-01) Černohorský Josef; Rydlo Pavel; Novák Miroslav; Koprnický Jan
- ItemFeasibility study of mobile robot in spinnig machine space - robot no.3(2015-01-01) Černohorský Josef; Novák Miroslav; Koprnický Jan; Rydlo Pavel
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