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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">pribor</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Приборостроение</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of Instrument Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3454</issn><issn pub-type="epub">2500-0381</issn><publisher><publisher-name>Национальный исследовательский университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/0021-3454-2023-66-10-828-833</article-id><article-id custom-type="elpub" pub-id-type="custom">pribor-181</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>СИСТЕМНЫЙ АНАЛИЗ, УПРАВЛЕНИЕ И ОБРАБОТКА ИНФОРМАЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SYSTEM ANALYSIS, MANAGEMENT AND INFORMATION PROCESSING</subject></subj-group></article-categories><title-group><article-title>Адаптивные наблюдатели для нелинейных систем на основе процедуры динамического расширения и смешивания</article-title><trans-title-group xml:lang="en"><trans-title>Adaptive observers for nonlinear systems based on dynamic extension and mixing procedure</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беспалов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bespalov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Владимирович Беспалов - аспирант</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Vladimir V. Bespalov - Faculty of Control Systems and Robotics</p><p>St. Petersburg</p></bio><email xlink:type="simple">vvbespalov@itmo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ведяков</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vedyakov</surname><given-names>А. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Алексеевич Ведяков - канд. техн. наук, факультет систем управления и робототехники; доцент</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Alexey А. Vedyakov - PhD, Faculty of Control Systems and Robotics</p><p>St. Petersburg</p></bio><email xlink:type="simple">vedyakov@itmo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет ИТМО</institution></aff><aff xml:lang="en"><institution>ITMO University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>29</day><month>11</month><year>2024</year></pub-date><volume>66</volume><issue>10</issue><fpage>828</fpage><lpage>833</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Национальный исследовательский университет ИТМО, 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Национальный исследовательский университет ИТМО</copyright-holder><copyright-holder xml:lang="en">Национальный исследовательский университет ИТМО</copyright-holder><license xlink:href="https://pribor.ifmo.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://pribor.ifmo.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://pribor.ifmo.ru/jour/article/view/181">https://pribor.ifmo.ru/jour/article/view/181</self-uri><abstract><p>Рассмотрена задача синтеза адаптивного наблюдателя переменных состояния нелинейных динамических систем. Получение корректной оценки компонентов вектора состояний при параметрической неопределенности — достаточно сложный процесс, необходимый, например, при решении ряда задач управления или диагностики. Процесс синтеза предложенного адаптивного наблюдателя разделен на два этапа. На первом этапе осуществляется параметризация нелинейной динамической системы, принадлежащей заранее определенному классу систем, приводимых к линейной по состоянию форме. На втором оцениваются неизвестные параметры на основе метода градиентного спуска и синтезируется градиентный наблюдатель переменных состояния.</p></abstract><trans-abstract xml:lang="en"><p>The problem of synthesizing an adaptive observer of state variables of nonlinear dynamic systems is considered. Correct estimation of state vector components under parametric uncertainty is a rather complex process necessary e.g. for solving several problems of systems control and diagnostic. Synthesis of the proposed adaptive observer consists of two steps. In the first one, a parameterization of the nonlinear dynamical system, which can be transformed to a state affine form, is performed. In the second step, the unknown parameters are estimated based on the gradient descent method, and a gradient-based observer for the state variables is designed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>адаптивный наблюдатель</kwd><kwd>параметризация нелинейной системы</kwd><kwd>линейные по состоянию формы</kwd><kwd>глобальная сходимость</kwd><kwd>оценка параметров</kwd></kwd-group><kwd-group xml:lang="en"><kwd>adaptive observer</kwd><kwd>nonlinear system parameterization</kwd><kwd>affine state form</kwd><kwd>global convergence</kwd><kwd>parameter estimation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Министерства науки и высшего образования Российской Федерации, паспорт госзадания 2019-0898.</funding-statement><funding-statement xml:lang="en">The work was carried out with the support of the Ministry of Science and Higher Education of the Russian Federation, state assignment passport 2019-0898.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kazantzis N. and Kravaris C. 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