Features of mathematical modeling of electromagnetic processing of bulk materials

Zaporozhets, Yuri; Батечко, Ніна; Shostak, Sergey; Shkoda, N. G.; Dibrivna, Emilia

doi:10.15587/1729-4061.2020.206705

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…1). The scheme allows solving modelling problems and information problems of the smart-grid [14,15] The SI-model of the OCP is implemented in CAD based on functional modelling, taking into account real emergency files [22,23], [24,25], [26,27]. Taking into account the individual characteristics of specific OCPs will be reserved for the tasks of adapting or improving structures [28,29], [30,31], [32].…”

Section: а) Description Of the Ocp Structure By Trees Of Formation Gessсen And Gessnmentioning

confidence: 99%

Detecting development scenarios of dynamic events in electric power networks smart-grid Part1 “Method”

Sivokobylenko¹,

Nikiforov²,

Zhuravlov³

2021

AAIT

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A method for constructing a semantic S-detector for the senior hierarchical level of pattern recognition in dynamic objects is proposed. The S-detection method is based on a uniform synthesis of all hierarchically subordinate detectors and information preparation schemes, based on the tasks of the upper hierarchical level of recognition of scenarios for the development of processes in an object. The method can be used to solve problems of relay protection, emergency control automation, to identify rare events in impulse, short-term input signals when implementing the concept of developing of electric power smart-grid. The synthesis of the Sdetector of scenarios for the development of transient processes was the result of the development of a structural-information SImethod for processing information components. A mathematical SI-model is presented that allows you to control the mutual correspondence of the structure of the formation tree in the object and the device recognition tree. The task is to improve the stability of the device recognition algorithm. The Part 1 describes the theoretical provisions of the application of the recognition method. It is proposed to unify the trees for generating recognition scenarios in the industry, similar to the IEEE high-voltage network diagrams. The S-detector algorithm based on the formation of a semantic signal and on the selective search for the required amount of information for automatic decision-making is presented. The facts of the appearance of elementary information events in the input signals of the detector are controlled by Ξ,H-selectivity windows, which are sequentially opened depending on the previous development of events. The block diagram of the S-detector of the scenario is presented, which can be synchronous, multichannel, with a high signal processing speed, without losing rapidly changing information when slow and infraslow information is detected. Combines useful properties of instantaneous and inertial detection algorithms. The output of the S-detector is a series of responses with different weights. This allows elementary detectors to be combined into sequential chains at different hierarchical levels of recognition. Part 2 provides an example of the application of the scenario detection method to solve the problem of increasing the stability of the operation of a selective protection relay against single-phase earth faults based on medium-frequency signals in 6-35 kV networks with an arc suppression Petersen’s coil. The results of modelling the operation of the S-detector algorithm on the signals of real emergency files recorded by high-frequency recorders of transient processes in the network are presented.

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Section: а) Description Of the Ocp Structure By Trees Of Formation Gessсen And Gessnmentioning

confidence: 99%

Detecting development scenarios of dynamic events in electric power networks smart-grid Part1 “Method”

Sivokobylenko¹,

Nikiforov²,

Zhuravlov³

2021

AAIT

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“…For this, the CM is linked, which is defined by the following codes: Amodtask = [001, 110, 011, 011, 001, 001]; Bmattool = [010, 010, 001∩ 011, 010∩ 011]; Ccalctool = idem. Figure 6 shows the diagrams of the distribution of surface specific forces vectors acting on a microparticle under the specified conditions [22]. The combination of these forces creates a resul- tant force directed at an angle  60˚ to the x-axis, which pulls the particle to the "light" electrode, as well as torque that rotates it clockwise.…”

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confidence: 99%

“…MT disposition: the same as the previous one, only instead of two particles, a thin plate is placed across the field (with a ratio of thickness to length of 1: 10). This task is typical for electrostatics where thin sheet electrodes are used in various devices [22]. A feature of this CM is the need to split the integration contour into a large number of small DEs due to the close distance of the opposite sides of the plate, but other studies will show how to get around this complication.…”

mentioning

confidence: 99%

Innovative System of Computer Modelling of Multiphysics Processes for Controlled Electrocurrent Treatment of Melts

Zaporozhets¹,

Иванов²,

Kondratenko

et al. 2022

Sci. innov.

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Introduction. The widespread use of cast products made of aluminum and its alloys requires ensuring a highquality structure of the castings, on which their operational properties depend. Controlling the process of forming a high-quality structure of castings is possible, in particular, by the method of electrocurrent treatment of melts.Problem Statement. The melt medium being inaccessible for direct measurement of the processing parameters, the only way to realize the control of treatment conditions is numerical simulation of these parameters. However, the complexity and interdependence of multiphysics processes of melt electrocurrent treatment have led to an unconventional approach to the formulation of their mathematical models and computational procedures. These circumstances have determined the features of the tasks for the construction of appropriate computer models and their application.Purpose. The development of a new pattern-modular system for computer modeling of multiphysics processes of electric current treatment of melts to control the conditions of the formation of a qualitative structure of castings.Materials and Methods. The material of the research is a set of model problems of multiphysical processes of electrocurrent treatment and their ontology, the integral equations and their properties, as well as databases on the parameters of simulated objects, which describe these processes. The method of ontological taxonomy has been used to create a taxonomic codifier, with the help of which model problems and mathematical tools for their solution have been systematized. Based on the signs of similarity, the method of formalization of integral equations of coupled multiphysics processes has been applied. Results. The unified patterns of basic algorithmic procedures and a library of program modules for computing operations of partial tasks, for which a unique code is assigned according to the codifier have been developed. Combining the patterns with different modules that are identified by the indicated codes has made it possible to form a wide range of computer models reflecting multiphysics processes. A flexible system for computer modeling of multiphysical processes has been built and its efficiency for simulating the modes of electrocurrent treatment of melts has been confirmed.Conclusions. The results obtained have enabled controlling the conditions of electrocurrent treatment of melts to form a highquality structure of cast metal.

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Features of mathematical modeling of electromagnetic processing of bulk materials

Cited by 2 publications

References 16 publications

Detecting development scenarios of dynamic events in electric power networks smart-grid Part1 “Method”

Detecting development scenarios of dynamic events in electric power networks smart-grid Part1 “Method”

Innovative System of Computer Modelling of Multiphysics Processes for Controlled Electrocurrent Treatment of Melts

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