Hakutulokset - A. V. Isaev
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1
On Objective and Subjective Facets of the Battle of Moscow
Julkaistu 2012-02-01Hae kokoteksti.
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2
Assessment of Electrical Machines’ State Based on Mathematical Modeling of Defect Formation in Windings
Julkaistu 2022-12-01Hae kokotekstiThe highest quality and timely diagnostics of windings’ state of various types of electrical machines including of asynchronous motors’ windings is an impoitant task. Among the existing diagnostic methods currently the most promising are those ones based on methods for analyzing resonance processes...
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3
Dynamic Features of Spectra of Single and Quasi-Periodic Measuring Signals
Julkaistu 2022-07-01Hae kokotekstiSolving the problems of spectral processing of single and quasi-periodic signals in measurement and diagnostic systems is directly related to their isolation against the background of external interference or noise. The purpose of this work was to study single and quasi-periodic signals, i. e. signa...
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4
Increasing of the Accuracy of Signalsʼ Time Parameters Measuring Using Double Pulse Trains
Julkaistu 2021-12-01Hae kokotekstiIn modern diagnostics, much attention is paid to measuring of time parameters, as well as their change over time. The purpose of this work is to develop a method for measuring of time intervals which made it possible to increase the measurement accuracy by reducing errors associated with the instabi...
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5
Spectral Method of Measuring of Changes in Time Intervals between Periodic Pulse Sequences
Julkaistu 2019-06-01Hae kokotekstiMethods of measuring delay time between periodic sequences of pulses are mostly based on the considered parameter direct measurement. The main disadvantage of this approach is the difficulty of ensuring the measurements accuracy in the noise conditions. The aim of this work was to develop a method t...
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6
Analysis of Electrical Machines’ State by Measuring the Interturn Resistance in Its Windings
Julkaistu 2023-08-01Hae kokotekstiDiagnostic methods applied in the industry do not allow to control the state of electrical machines windings in working condition and to fix the defect formation in them at the early stages of development. The aim of the work was to develop a method and construct a device that allows measuring inter...
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7
Influence of the Level of Defective Insulation Resistance of Electrical Machine Windings on Parameters of no-Load Current
Julkaistu 2024-12-01Hae kokotekstiDiagnostic methods that will change at present for monitoring the condition of windings of electric machines do not allow to detect defect formation in them at early stages of development. And this problem is especially relevant for equipment that is directly in its operating mode. The purpose of th...
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8
A mathematical model of the dynamic viscosity dependence of motor oils on temperature, soot concentration, and its morphology
Julkaistu 2025-01-01Hae kokotekstiObjectives. A quick cold start of emergency and auxiliary power units based on diesel engines should be possible at any time without problems and in the shortest possible time. The condition of the engine oil is one of the most important factors influencing the smooth start-up of power plants. Durin...
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