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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mireabulletin</journal-id><journal-title-group><journal-title xml:lang="ru">Russian Technological Journal</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Technological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-3210</issn><issn pub-type="epub">2500-316X</issn><publisher><publisher-name>RTU MIREA</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2500-316X-2025-13-5-87-94</article-id><article-id custom-type="edn" pub-id-type="custom">SPEPVZ</article-id><article-id custom-type="elpub" pub-id-type="custom">mireabulletin-1247</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL MODELING</subject></subj-group></article-categories><title-group><article-title>Аналитическая модель нормальной составляющей магнитной индукции постоянного магнита</article-title><trans-title-group xml:lang="en"><trans-title>Analytical model for the normal component of magnetic induction of a permanent magnets</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-1249-8039</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Закатов</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakatov</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Закатов Михаил Михайлович, к.т.н., старший научный сотрудник, доцент, кафедра механики и инженерной графики</p><p>141435, Московская обл., г.о. Химки, мкр. Новогорск, ул. Соколовская, стр. 1</p></bio><bio xml:lang="en"><p>Mikhail M. Zakatov, Cand. Sci. (Eng.), Senior Researcher, Associate Professor, Department of Mechanics and Engineering Graphics</p><p>1, Sokolovskaya ul., mkr. Novogorsk, Khimki, Moscow oblast, 141435</p></bio><email xlink:type="simple">zakatov46@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Академия гражданской защиты МЧС России имени Д.И. Михайлика</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Dmitriy Mikhailik Academy of Civil Defence of the Ministry of Emergency Situations of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>08</day><month>10</month><year>2025</year></pub-date><volume>13</volume><issue>5</issue><fpage>87</fpage><lpage>94</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Закатов М.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Закатов М.М.</copyright-holder><copyright-holder xml:lang="en">Zakatov M.M.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.rtj-mirea.ru/jour/article/view/1247">https://www.rtj-mirea.ru/jour/article/view/1247</self-uri><abstract><p>Цели. В измерительной системе с индукционной передачей информации с перемещающейся конструкции на неподвижный приемник информационный сигнал, несущий информацию о параметрах перемещающейся конструкции, формируется магнитной системой, содержащей постоянный магнит, установленный на неподвижной части измерительной системы. Магнитное поле постоянного магнита (МППМ) определяет магнитный поток, и, следовательно, индукционный ток в другом элементе магнитной системы – проводящем витке, расположенном на перемещающейся конструкции. Для теоретического обоснования параметров измерительной системы, в т.ч. для оптимизации ее составных частей, необходима простая, удобная для применения аналитическая модель информационного сигнала (АМИС), что определяет требования к математическому описанию МППМ. Известные решения задач по расчету МППМ содержат обратные тригонометрические функции или представлены результатами численных расчетов, что затрудняет их использование для разработки АМИС измерительной системы. Целью данной статьи является получение точного решения задачи расчета МППМ и разработка на основании этого точного решения аналитической модели нормальной составляющей вектора магнитной индукции (НСВМИ) постоянного магнита, используемой для разработки АМИС.Методы. Использовались методы математического анализа и метод эквивалентного соленоида.Результаты. Получено точное решение задачи расчета НСВМИ МППМ, имеющего форму параллелепипеда, на основании которого получено выражение, аппроксимирующее формулу точного решения, – аналитическая модель НСВМИ.Выводы. Полученная аналитическая модель НСВМИ может быть использована для теоретической разработки АМИС измерительной системы с индукционной передачей информации о параметрах перемещающейся конструкции на неподвижный приемник сигнала.</p></abstract><trans-abstract xml:lang="en"><p>Objectives. In a measuring system based on the inductive transmission of information from a moving structure to a stationary signal receiver, the signal carrying useful information about the parameters of the moving structure is formed by a magnetic system containing a permanent magnet mounted on the stationary part of the measuring system. The magnetic field of the permanent magnet (MFPM) determines the magnetic flux, and, consequently, the induction current in a conducting coil located on the moving structure. In order to theoretically justify the parameters of the measuring system including the optimization of its components, a simple and easy-to-use analytical model of the useful signal for determining the requirements for the mathematical description of the MFPM is required. The use of known solutions for developing an analytical model of the useful signal of the measuring system is complicated by the need to use inverse trigonometric functions or the results of numerical calculations. The present work sets out to obtain an exact solution to the problem of calculating the MFPM and on this basis to develop a simple, convenient analytical model of the normal component of the magnetic induction vector (NCMIV) of a permanent magnet used to develop an analytical model of the useful signal.Methods. The equivalent solenoid method was used along with mathematical analysis approaches.Results. An exact solution for calculating the normal component of the magnetic induction vector of the parallelepipedshaped permanent magnet was obtained. Based on this, a straightforward and easy-to-use analytical model of the NCMIV was developed, which closely approximates the formula derived for the exact solution.Conclusions. The developed analytical model of the NCMIV can be used for theoretical development of an analytical model of the useful signal of a measuring system with inductive transmission of information about the parameters of a moving structure to a stationary signal receiver.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>постоянный магнит</kwd><kwd>магнитная индукция</kwd><kwd>эквивалентный соленоид</kwd><kwd>нормальная составляющая</kwd><kwd>аналитическая модель</kwd></kwd-group><kwd-group xml:lang="en"><kwd>permanent magnet</kwd><kwd>magnetic induction</kwd><kwd>equivalent solenoid</kwd><kwd>normal component</kwd><kwd>analytical model</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Попов И.А., Гортышов Ю.Ф., Олимпиев В.В. Промышленное применение интенсификации теплообмена – современное состояние проблемы (Обзор). 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