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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">10.17586/0021-3454-2026-69-8-665-675</article-id><article-id custom-type="elpub" pub-id-type="custom">pribor-579</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>Синтез наблюдателя для класса описываемых дифференциально-алгебраическими уравнениями систем и идентификация параметров неизмеряемого возмущения</article-title><trans-title-group xml:lang="en"><trans-title>Synthesis of an Observer for a Class of Systems Described by Differential-Algebraic Equations, and Identification of Parameters of Unmeasured Disturbances</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>Оськина</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Oskina</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Владимировна Оськина -  аспирант; факультет систем управления и робототехники</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Olga V. Oskina - Post-Graduate Student; Faculty of Control Systems and Robotics</p><p>St. Petersburg</p></bio><email xlink:type="simple">ov_oskina@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>Бобцов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bobtsov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Алексеевич Бобцов - д-р техн. наук, профессор; факультет систем управления и робототехники; профессор</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Alexey A. Bobtsov - PhD, Professor, Faculty of Control Systems and Robotics; Professor</p><p>St. Petersburg</p></bio><email xlink:type="simple">bobtsov@mail.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><country>Россия</country></aff><aff xml:lang="en"><institution>ITMO University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>06</day><month>09</month><year>2026</year></pub-date><volume>69</volume><issue>8</issue><fpage>665</fpage><lpage>675</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Национальный исследовательский университет ИТМО, 2026</copyright-statement><copyright-year>2026</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/579">https://pribor.ifmo.ru/jour/article/view/579</self-uri><abstract><p>Для линейных дескрипторных систем, подверженных несогласованным возмущениям, предложен метод синтеза наблюдателя, восстанавливающего неизмеряемый вектор состояния по доступному для измерения выходному сигналу. При выполнении вводимых структурных допущений предлагаемый наблюдатель позволяет также восстановить сигнал возмущения и идентифицировать его неизвестные параметры. Представлен метод параметризации для определенного класса возмущающих воздействий, позволяющий перейти от нелинейной зависимости от неизвестных параметров к линейной регрессии относительно их комбинации. Численное моделирование подтверждает работоспособность предлагаемых методов.</p></abstract><trans-abstract xml:lang="en"><p>For linear descriptor systems subject to inconsistent perturbations, a method is proposed for synthesizing an observer that reconstructs an immeasurable state vector from an output signal available for measurement. When the introduced structural assumptions are fulfilled, the proposed observer also enables restoring the disturbance signal and identifying its unknown parameters. A parameterization method for a certain class of disturbing effects is presented, which makes it possible to move from unknown parameters to linear regression with respect to a certain combination of these parameters. Numerical modeling confirms the operability of the proposed methods.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дифференциально-алгебраические уравнения</kwd><kwd>дескрипторные системы</kwd><kwd>адаптивный наблюдатель</kwd><kwd>DREM</kwd><kwd>градиентный метод</kwd><kwd>идентификация параметров</kwd></kwd-group><kwd-group xml:lang="en"><kwd>differential-algebraic equations</kwd><kwd>descriptor systems</kwd><kwd>adaptive observer</kwd><kwd>DREM</kwd><kwd>gradient method</kwd><kwd>parameter identification</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">статья подготовлена при финансовой поддержке Министерства науки и высшего образования Российской Федерации, проект № FSER-2025-0002.</funding-statement><funding-statement xml:lang="en">The article was prepared with the financial support of the Ministry of Science and Higher Education of the Russian Federation, project No. FSER-2025-0002.</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">Duan G.-R. 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