Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Saygid UVAYSOV"

Analysis of the physical foundations of the build quality of the diagnosis structures based on electronic means of recording and analyzing the parameters of electromagnetic radiation mechanical contact connections DOI:10.15199/48.2017.05.29

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The paper presents the results of research that can be put into the development and research of non-contact rapid method for assessing the quality of the assembly and installation of EM designs. To achieve the objectives, studied the behavior of the mechanical connection of the contact pairs, namely the definition of the contribution of R,L,C parameters contact joints in the modulation level and the spectral composition of the electromagnetic radiation mechanical contact pair Streszczenie. W artykule przedstawiono wyniki badań, które mogą być wprowadzane do rozwoju oraz badań bezdotykowego szybkiego sposobu oceny jakości montażu i instalacji projektów EM. W tym celu zbadano zachowanie połączenia mechanicznego pary styków, mianowicie zdefiniowano wpływ parametrów R, L, C połączeń stykowych na poziom modulacji i skład widmowy promieniowania elektromagnetycznego mechanicznego styku par. (Analiza fizycznych podstaw jakości wykonania struktur diagnostycznych opartych na elektronicznym sposobie rejestrowania i analizowania parametrów promieniowania elektromagnetycznego mechanicznych połączeń stykowych) Keywords: diagnostics, mechanical connections, electromagnetic radiation, interference contact Słowa kluczowe: diagnostyka, połączenia mechaniczne, promieniowanie elektromagnetyczne, styk Introduction In today's design and manufacture of electronic means (EM) for assessing the quality of produced mechanical constructions, comprising testing the level of structural strength parameters are used, usually different types of mechanical influences. In this case, removed from the EM signal via mechanical quantities sensors that contain diagnostic information, it is concluded that the technical condition of the structure, the presence of defects. Among the main parameters that characterize the quality of assembly is the presence of non-compliance with tightening torques of threaded connections. This analysis is associated with the processing of larg[...]

Generator modes for technological installations with variable parameters of the oscillating circuit DOI:10.15199/48.2019.04.33

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In technological installations for ultrasonic machining (USM), piezoelectric and magnetostrictive transducers (PET and SME) of electric oscillations are used in mechanical deformation of the medium with processed products as executive bodies in various technological processes. To generate electric oscillations, specialized generators (inverters) are used. Technical characteristics and operating modes of this generator are subject to special requirements. Generally, the PET is a package of piezoceramic washers with a diameter of 20 to 120 mm and a thickness of 3 to 10 mm, reinforced with metal straps. When the piezo packet is generated by electric oscillations due to the secondary piezoelectric effect, its bends occur and mechanical oscillations arise [1]. For example, in engineering technologies where ultrasonic treatment is applied, a variety of operations can be performed. Such as:  Cleaning and washing products,  Cutting, microwelding, brazing,  Shaping of parts from hard or brittle materials,  Hardening of the cutting tool,  Actuation of a percussion instrument. In technological installations, especially where percussion impacts on the tool are used, there is a sharp change of the load PET. This affects the generator operating modes. It is known [2,3] that piezoceramics possess a very high electromechanical Q-factor and its resonance characteristic is very sharp, so if the frequencies of the feeding generator and the instrument do not coincide, emergency regimes may arise. In this case, the generator will operate in modes from idle to short circuit, which is accompanied by the occurrence of either over voltages or over currents in the circuit. Formulation of the problem On the assumption of the foregoing, it is possible to determine a number of requirements for supplying PET generators capable of operating both on a regular basis and in emergency conditions:  Sinusoid[...]

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