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National Repository of Grey Literature

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	The Vibrattion Measurement Methods of the Engineering Components under Rotation Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír The paper describes vibration measurement methods under rotation of mounted wheels and steam turbine blades and signal transfer from rotating components to evaluation devices. The aothors devote to solution of radio telemetric transfer signal problems in the paper. Detailed record
	The Prediction of Noise and Vibration through the Use of Software Means Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír The report describes the process of building a model of vehicles and prediction of noise path on the basic of Statistical Energy Analysis. The report emphasizes legislative needs, which ask for the lowestlevel of noise pollution inside and outside of public transportation vehicles. Detailed record
	Zjednodušené 2D zobrazení elektromagnetického pole pohonu s indukčním motorem Nečesaný, Jakub ; Škramlík, Jiří ; Jehlička, Vladimír This work is focused on magnetic field modeling and analysis inside and outside the trolley bus 21 TR. Computation is carried out for application of two different power switching semiconductor devices. Influence on environment and near low-current and telecommunication systems is evaluated. Local maximum of magnetic field and the geometrical convergence is also determined. The results are discussed with the corresponding standards and concretemeasurement on the vehicle. Detailed record
	Undesirable Noise Phenomena Generated by Semiconductor Converters Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír The broad use of modern semiconductor converters, whose outstanding features are steep increase in current and switching frequency usually in the range 2 to 3 kHz, often incurs undesirable noise phenomena in electric drives used in vehicles of city mass transportation. The presented paper is focused on locating the sources of noise and on its transportation to the interior of the vehicle. Detailed record
	Numerical Analysis of the Magnetic Field of the Trolley Bus Nečesaný, Jakub ; Škramlík, Jiří This work is focused on magnetic field modeling and analysis inside and outside the trolley bus 21Tr. Computation is carried out for various working regimes for application of two different power switching semiconductor devices. Influence on environment and near low-current and telecommunication systems is evaluated. Computation of the magnetic field is per-formed by a professional FEM-based program QUICKFIELD. Problems associated with numerical computation are discussed. Local maximum of the magnetic field is also determined. Detailed record
	Computing Methods of Noise, Vibration and Electromagnetic Waves Diffusion Budek, P. ; Jehlička, Vladimír ; Nečesaný, Jakub The paper deals with the utilization of SW means for the predition of noise and electromagnetic emission in vehicles of city mass transportation. It also compares the results of experimental measurements with the results obtained through mathematical simulations and modeling. Detailed record
	The Impact of the Grid Impadance on the HPF Performance Škramlík, Jiří For the implementation of Hybrid Power Filters (HPF) into a real environment it is desirable to know the impact of the grid impedance on the HPF performance. The paper evaluates the impact of diffetent components of the grid impedance and a load impedance on the HPF performance criteria by using the Fourier analysis. Detailed record
	Computation Simulation of Noise and Electromagnetic Waves in City Mass Transport Vehicles Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír ; Nečesaný, Jakub New problems emerge in the vehicles of city mass transportation due to the development, change of the some structure or application of the new devices. These problems are noise, vibration and electromagnetic interference. They were aimed at finding their sources, at verifying their influence and finding methods for their limitation. Detailed record
	Prediction of Propagation of Noice and Electromagnetic Waves in Vehicles of Mass Transportation Budek, P. ; Chmelíček, M. ; Jehlička, Vladimír News problems emerge in the vehicles of city mass transportation due to the development, change of the some structure or application of the new devices. These problems are noise, vibration and electromagnetic interference. They were aimed at finding their sources, at verifying their influence and finding methods for their limitation. Detailed record

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