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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">16206</article-id><article-id pub-id-type="doi">10.22363/2312-9735-2017-25-3-234-252</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Modeling and Simulation</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Математическое моделирование</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Application of the Harmonic Linearization Method to the Study a Control Systems with a Self-Oscillatory Regime</article-title><trans-title-group xml:lang="ru"><trans-title>Применение метода гармонической линеаризации к исследованию автоколебательного режима систем с управлением</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kulyabov</surname><given-names>D S</given-names></name><name xml:lang="ru"><surname>Кулябов</surname><given-names>Дмитрий Сергеевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Applied Probability and Informatics; Laboratory of Information Technologies Joint Institute for Nuclear Research 6 Joliot-Curie St., Dubna, Moscow region, 141980, Russian Federation</p></bio><bio xml:lang="ru"><p>Кафедра прикладной информатики и теории вероятностей; Лаборатория информационных технологий, Объединённый институт ядерных исследований, ул. Жолио-Кюри 6, Дубна, Московская область, Россия, 141980</p></bio><email>kulyabov_ds@rudn.university</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Korolkova</surname><given-names>A V</given-names></name><name xml:lang="ru"><surname>Королькова</surname><given-names>Анна Владиславовна</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Applied Probability and Informatics</p></bio><bio xml:lang="ru"><p>Кафедра прикладной информатики и теории вероятностей</p></bio><email>korolkova_av@rudn.university</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Velieva</surname><given-names>T R</given-names></name><name xml:lang="ru"><surname>Велиева</surname><given-names>Татьяна Рефатовна</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Applied Probability and Informatics</p></bio><bio xml:lang="ru"><p>Кафедра прикладной информатики и теории вероятностей</p></bio><email>velieva_tr@rudn.university</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2017-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2017</year></pub-date><volume>25</volume><issue>3</issue><issue-title xml:lang="en">VOL 25, NO3 (2017)</issue-title><issue-title xml:lang="ru">ТОМ 25, №3 (2017)</issue-title><fpage>234</fpage><lpage>252</lpage><history><date date-type="received" iso-8601-date="2017-06-06"><day>06</day><month>06</month><year>2017</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2017, Kulyabov D.S., Korolkova A.V., Velieva T.R.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2017, Кулябов Д.С., Королькова А.В., Велиева Т.Р.</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="en">Kulyabov D.S., Korolkova A.V., Velieva T.R.</copyright-holder><copyright-holder xml:lang="ru">Кулябов Д.С., Королькова А.В., Велиева Т.Р.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/16206">https://journals.rudn.ru/miph/article/view/16206</self-uri><abstract xml:lang="en"><p>In data transmission networks implemented as systems with control, the phenomenon of global synchronization can occur. Outwardly, this phenomenon manifests itself as a self-oscillating mode in the system. This mode negatively affects the characteristics of the entire system, such as throughput and transmission delays. Relevant is the problem of finding the areas of occurrence of self-oscillation. The authors investigated this problem for the system as a whole. Also, the problem of isolating the elements of the system responsible for the appearance of an autooscillatory regime is urgent. The complexity of this problem is caused by the essentially nonlinear character of the system and its elements. Often, the linearization method is used for the decomposition of the system. But with the linearization, the self-oscillatory regime disappears. There is a need to find a method of decomposition, non-destructive self-oscillating mode of the system. As such a method, the authors suggest using the method of harmonic linearization. This method is used in the control theory. However, we must admit that this mathematical apparatus is little known to researchers specializing in the study of networks. The authors tried to describe in as much detail the process of research using the method of harmonic linearization. The method is used to study the influence of the form of RED-type function on the occurrence of self-oscillation mode. Thus, this material is more methodical than exploratory one.</p></abstract><trans-abstract xml:lang="ru"><p>В сетях передачи данных, реализуемых как системы с управлением, может возникать явление глобальной синхронизации. Внешне это явление проявляется как автоколебательный режим в системе, который негативным образом влияет на такие характеристики системы как пропускная способность и задержки передачи. Ранее авторами исследовалась задача нахождения зон возникновения автоколебаний для системы в целом. Авторам представляется актуальной задача выделения элементов системы, ответственных за возникновение автоколебательного режима. Сложность этой задачи вызвана существенно нелинейным характером системы и её элементов. Зачастую для декомпозиции системы применяют метод линеаризации. Но в этом случае пропадает автоколебательный режим. Таким образом возникает необходимость поиска метода декомпозиции, не разрушающего автоколебательный режим системы. В качестве такого метода авторы предлагают использовать метод гармонической линеаризации, применяемый в теории автоматического управления. Однако приходится признать, что данный математический аппарат мало знаком исследователям, специализирующимся на исследовании систем и сетей передачи данных. Авторы постарались как можно более подробно описать применение метода гармонической линеаризации к исследованию влияния функции сброса пакетов по алгоритму RED в системе с управлением на процесс возникновения автоколебательного режима. Таким образом, данный материал носит скорее методический, чем исследовательский характер.</p></trans-abstract><kwd-group xml:lang="en"><kwd>RED</kwd><kwd>traffic active management</kwd><kwd>control theory</kwd><kwd>self-oscillating mode</kwd><kwd>method of harmonic linearization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>активное управление трафиком</kwd><kwd>теория управления</kwd><kwd>автоколебательный режим</kwd><kwd>метод гармонической линеаризации</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">S. Floyd, V. Jacobson, Random Early Detection Gateways for Congestion Avoidance, IEEE/ACM Transactions on Networking 1 (4) (1993) 397–413. doi:10.1109/90.251892.</mixed-citation><mixed-citation xml:lang="ru">Floyd S., Jacobson V. Random Early Detection Gateways for Congestion Avoidance // IEEE/ACM Transactions on Networking. 1993. Vol. 1, No 4. 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