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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">mathnas</journal-id><journal-title-group><journal-title xml:lang="ru">Труды Института математики НАН Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Institute of Mathematics of the NAS of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-5093</issn><publisher><publisher-name>Институт математики НАН Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.67268/1812-5093-2026-34-1s-155-166</article-id><article-id custom-type="edn" pub-id-type="custom">JHUQCK</article-id><article-id custom-type="elpub" pub-id-type="custom">mathnas-193</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>ДИФФЕРЕНЦИАЛЬНЫЕ УРАВНЕНИЯ, ДИНАМИЧЕСКИЕ СИСТЕМЫ И ОПТИМАЛЬНОЕ УПРАВЛЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIFFERENTIAL EQUATIONS, DYNAMIC SYSTEMS AND OPTIMAL CONTROL</subject></subj-group></article-categories><title-group><article-title>Задача назначения конечного спектра для линейных систем нейтрального типа в классе дифференциально-разностных регуляторов типа обратной связи по выходу</article-title><trans-title-group xml:lang="en"><trans-title>Finite spectrum assignment problem for linear neutral-type systems in the class of differential-difference output-feedback controllers</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>Хартовский</surname><given-names>В. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Khartovskii</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гродно</p></bio><bio xml:lang="en"><p>Grodno</p></bio><email xlink:type="simple">hartovskij@grsu.by</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>Китурко</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiturko</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гродно</p></bio><bio xml:lang="en"><p>Grodno</p></bio><email xlink:type="simple">kiturko.om@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Гродненский государственный университет имени Янки Купалы</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Yanka Kupala State University of Grodno</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>07</day><month>11</month><year>2026</year></pub-date><volume>34</volume><issue>1s</issue><fpage>155</fpage><lpage>166</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хартовский В.Е., Китурко О.М., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Хартовский В.Е., Китурко О.М.</copyright-holder><copyright-holder xml:lang="en">Khartovskii V.E., Kiturko O.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://mathnas.ejournal.by/jour/article/view/193">https://mathnas.ejournal.by/jour/article/view/193</self-uri><abstract><p>Для линейных автономных систем нейтрального типа исследована задача назначения конечного спектра при помощи регуляторов с сосредоточенными запаздываниями и обратной связью по выходу. Установлена связь между разрешимостью этой задачи в классе регуляторов с обратной связью по состоянию и в классе регуляторов с обратной связью по выходу. Рассмотрен регулятор на основе наблюдателя, для которого в рамках задачи назначения конечного спектра обоснован принцип разделения.</p></abstract><trans-abstract xml:lang="en"><p>We investigate the finite spectrum assignment problem for linear autonomous neutral-type systems using output-feedback controllers with lumped delays. We establish a connection between the solvability of this problem in the class of state feedback controllers and in the class of output feedback controllers. Finally, we consider an observer-based controller and validate the separation principle within the framework of the finite spectrum assignment problem.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>линейная автономная система нейтрального типа с запаздыванием</kwd><kwd>наблюдаемый сигнал</kwd><kwd>конечный спектр</kwd><kwd>регулятор</kwd><kwd>обратная связь по состоянию</kwd><kwd>обратная связь по выходу</kwd><kwd>наблюдатель</kwd><kwd>принцип разделения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>linear autonomous neutral-type systems with delay</kwd><kwd>observed signal</kwd><kwd>finite spectrum</kwd><kwd>controller</kwd><kwd>state feedback</kwd><kwd>output feedback</kwd><kwd>observer</kwd><kwd>separation principle</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">Wonham W. M. Linear Multivariable Control. 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