https://ir.lib.vntu.edu.ua/handle/123456789/415 Факультет електроенергетики та електромеханіки 2026-09-23T21:34:45Z https://ir.lib.vntu.edu.ua/handle/123456789/54398 Method of forming adaptive weighting coefficients of a tof flowmeter based on resonance channel data of sound velocity Bilynskyi, Y.; Stetsenko, A.; Білинський, Й. Й.; Стеценко, А. А. This paper proposes a method for adaptive formation of weighting coefficients in a multichannel ultrasonic time-of-flight (TOF) flowmeter using independent information on the speed of sound in the working medium obtained a resonant RES channel. Unlike the conventional approach, in which the contribution of individual acoustic paths is determined by constant spatial weights, the proposed method additionally modifies the basic weighting coefficients according to the current metrological consistency of each TOF channel. For each TOF channel, the mean flow-velocity component along the acoustic path (vi) and the effective speed of sound (ci) are determined the measured ultrasonic signal transit times in the downstream and upstream directions. An in- dependent estimate of the speed of sound (cRES) is provided by a resonant channel oriented perpendicular to the main flow direction. An algorithm has been developed that implements sequential determination of the TOF- and RES-channel parameters, evaluation of their metrological consistency within a moving time window, formation of reliability coefficients, normalization of adaptive weights, and monitoring of an integral reliability indicator of the measurement structure. Based on the discrepancy between ci and cRES, a dimensionless reliability coefficient is formed and used to modify the basic spatial weight. The resulting adaptive weight is defined as the normalized product of these quantities. To reduce the influence of individual outliers, robust estimation of the inconsistency within a moving time window is proposed. In addition, an integral indicator (Sq) is introduced to characterize the preservation of reliable spatial information. 2026-01-01T00:00:00Z https://ir.lib.vntu.edu.ua/handle/123456789/54077 Рівняння руху узагальненого електричного кола з урахуванням явища гіпервалентної взаємодії Ведміцький, Ю. Г.; Vedmitskyi, Yu. G. На основі рівнянь Лагранжа-Максвела з урахуванням фізичного явища гіпервалентної взаємодії отримано рівняння руху узагальненого за числом ступенів вільності електричного кола, здатного слугувати аналогом континуальних у часі динамічних систем електричної, неелектричної та змішаної фізичної природи. 2017-01-01T00:00:00Z https://ir.lib.vntu.edu.ua/handle/123456789/54076 Phase noncontact method and procedure for measurement of axial displacement of electric machine`s rotor Hraniak, V. F.; Kukharchuk, V. V.; Bogachuk, V. V.; Vedmitskyi, Yu. G.; Vishtak, I. V.; Popiel, P.; Yerkeldessova, G.; Граняк, В. Ф.; Кухарчук, В. В.; Богачук, В. В.; Ведміцький, Ю. Г.; Віштак, І. В. Proposed is a new noncontact method for measurement of axial displacement of electric machine’s rotor in real-time mode and developed is the structural pattern of measurement procedure to implement this. 2018-01-01T00:00:00Z https://ir.lib.vntu.edu.ua/handle/123456789/54075 Newton binomial in the generalized Cauchy problem asexemplified by electrical systems Vedmitskyi, Yu. G.; Kukharchuk, V. V.; Hraniak, V. F.; Vishtak, I. V.; Kacejko, P.; Abenov, A.; Ведміцький, Ю. Г.; Кухарчук, В. В.; Граняк, В. Ф.; Віштак, І. В. Presented in the paper are direct and indirect correspondence rules between the set of real and complex coefficients of two interrelated linear differential equations of random order, each of them being able in an individual and independent way to describe uninterrupted movement of generalized, in terms of the number of freedom degrees, dynamic system with lumped parameters in the fundamental Cauchy problem, which is formulated in the first case in terms of real time functions, and in another case – in terms of their complex images, which allows directly to set one of the said forms of Cauchy problem based on the other one both in the generalized form as to the order of differential equation and in particular form under given conditions, regardless of the physical nature of the system under examination. 2018-01-01T00:00:00Z