https://sci.ldubgd.edu.ua/jspui/handle/123456789/60 2026-06-25T09:03:29Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/18608 Title: DESIGN OF AN INTELLIGENT MULTI-CHANNEL SENSOR FOR EARLY DETECTION OF THERMAL DECOMPOSITION IN A LITHIUM-ION BATTERY Authors: Лазаренко, Олександр; Кушнір, Андрій; Тацій, Мар'ян; Башинський, Олег; Алешко, Роман Abstract: This study explores a process underlying the onset and evolution of an irreversible thermochemical reac-tion that fills a lithium-ion battery (LIB) internally. The issue related to early detection of the onset of thermal decomposition of LIB internal filling is that today there are no unified approaches and clearly defined param-eters that would make it possible to predict the failure of LIB. The process of LIB thermal decomposition can occur without visual signs and rapidly develop into intense combustion. Obtaining parameters for the onset of the evolution of LIB’s internal filling thermochemical reaction provides prerequisites for designing a sensor for early detection of LIB thermal decomposition.Based on the results from analytical processing of existing experimental studies on determining the chem-ical composition of the products of LIB thermal decom-position, the basic parameters have been established. In particular, the change in the concentration of CO2, HF, and Pabs was found to be the basis for further advance-ment of the model (mathematical basis) of the fuzzy correction unit.A fuzzy correction module using the Mamdani algo-rithm has been designed for a multi-channel sensor for early detection of thermal decomposition (SEDTD) inLIB. The forms and parameters of the input and out-put membership functions have been established. A database of fuzzy rules has been compiled that describe LIB’s possible states. Simulation in the Fuzzy Logic Toolbox package in the MATLAB environment (USA) qualitatively reflects the perception of input signals about the onset and evolution of a thermochemical reaction. The results of simulation studies have confirmed the effectiveness of the proposed approach. It has been established that the sensor, based on a comprehensive analysis of input parameters such as pressure, CO2 and HF concentrations, forms an information output signal that adequately reflects the technical condition of LIB, in particular normal, pre-fire (pre-emergency), and fire(emergency) states 2026-06-24T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/18535 Title: INNOVATIVE APPROACH TO THE EXPERIMENTAL REPRODUCTION OF NOMINAL AND ALTERNATIVE FIRE REGIMES Authors: Veselivskyi, R. B.; Kovalyshyn, V. V.; Yakovchuk, R. S.; Havrys, A. P.; Tarnavskyi, A. B. Abstract: Introduction. Th e prevention of the destruction of buildings and structures during a fi re is ensured through strict compliance with requirements for the necessary fi re resistance rating and classifi cation. To guaran-tee reliable and safe operation during the design and construction stages, building materials and struc-tures classifi ed according to their reaction to fi re and assessed by fi re resistance class have been required.Problem Statement. Since modern testing installations (furnaces) predominantly reproduce only the temperature regime of a standard fi re, while other heating regimes remain diffi cult or impossible to simulate, the development and application of specialized testing installations and chambers capable of experimentally providing the required temperature exposures are highly relevant.Purpose. Th e purpose of this study is to investigate the possibility of experimentally reproducing the tem-perature eff ects of nominal and alternative fi re regimes using an innovative experimental installation.Materials and Methods. Th e study has been conducted using an installation equipped with a 500 × × 500 × 500 mm chamber designed to assess the fi re-protective effi ciency of coatings. Th e test specimens consist of 500 × 500 mm steel plates with fi re-protective coatings. External fi re, slow-heating fi re, and parametric fi re regimes have been modeled by regulating the power of the heating elements and adjus-ting the distance between the heating elements and the specimen. Th e parametric temperature curve for a 60 m² fi re compartment has been calculated using the FIN EC soft ware package. Results. Experimental tests have confi rmed the eff ectiveness of reproducing nominal and alternative fi re regimes using the developed installation. Th e design features and technical solutions have provided cont rolled regulation of chamber heating and cooling, ensuring that deviations of the temperature–time curves remain within permissible limits accor-ding to DSTU EN 1363-1:2023 and DSTU EN 1363-2:2023.Conclusions. Th e stable operation of the electric heating elements has ensured eff ective reproduction of thermal regimes with deviations of less than 10% from standard fi re curves. Th e developed installation has demonstrated its applicability for assessing the fi re resistance of structures, determining the eff ectiveness of fi re-protective coatings, and developing experimental and theoretical methods for studying the thermophysical properties of materials under nomi-nal and alternative (realistic) fi re regimes 2026-06-01T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/18492 Title: МЕТОДИКИ ВИЗНАЧЕННЯ ЕФЕКТИВНОСТІ ГАСІННЯ ЛІТІЙ-ІОННИХ АКУМУЛЯТОРІВ Authors: Ковалишин, Василь; Марич, Володимир; Веселівський, Роман; Ковалишин, Володимир 2026-03-12T00:00:00Z https://sci.ldubgd.edu.ua/jspui/handle/123456789/18483 Title: ОБҐРУНТУВАННЯ ДОСЛІДЖЕНЬ НОРМАТИВНОГО ЧАСУ ВИКОНАННЯ НАВЧАЛЬНОЇ ВПРАВИ «ЗАКРІПЛЕННЯ РЯТУВАЛЬНОЇ МОТУЗКИ ЗА КОНСТРУКЦІЮ» Authors: Веселівський, Роман Богданович; Смоляк, Дмитро Володимирович; Поліщук, Ігор Михайлович 2026-03-12T00:00:00Z