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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">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</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">45007</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2025-26-2-113-126</article-id><article-id pub-id-type="edn">LFDTLM</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Modified Algorithm for Calculating the Parameters of Maneuvers of Coplanar Meeting of Spacecraft in a Near-Circular Orbit Using Low-Thrust Engines</article-title><trans-title-group xml:lang="ru"><trans-title>Модифицированный алгоритм расчета параметров маневра копланарной встречи космических аппаратов на околокруговой орбите с использованием двигателей малой тяги</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1823-9354</contrib-id><contrib-id contrib-id-type="spin">6606-3690</contrib-id><name-alternatives><name xml:lang="en"><surname>Baranov</surname><given-names>Andrey A.</given-names></name><name xml:lang="ru"><surname>Баранов</surname><given-names>Андрей Анатольевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Physical and Mathematical Sciences, leading researcher</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, ведущий научный сотрудник</p></bio><email>andrey_baranov@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5632-3747</contrib-id><name-alternatives><name xml:lang="en"><surname>Olivio</surname><given-names>Adilson P.</given-names></name><name xml:lang="ru"><surname>Оливио</surname><given-names>Адилсон Педро</given-names></name></name-alternatives><bio xml:lang="en"><p>Postgraduate of Department of Mechanics and Control Processes, Academy of Engineering</p></bio><bio xml:lang="ru"><p>аспирант кафедры механики и процессов управления, инженерная академия</p></bio><email>pedrokekule@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Keldysh Institute of Applied Mathematics, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт прикладной математики имени М.В. Келдыша Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">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="2025-07-03" publication-format="electronic"><day>03</day><month>07</month><year>2025</year></pub-date><volume>26</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>113</fpage><lpage>126</lpage><history><date date-type="received" iso-8601-date="2025-07-14"><day>14</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Baranov A.A., Olivio A.P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Баранов А.А., Оливио А.П.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Baranov A.A., Olivio A.P.</copyright-holder><copyright-holder xml:lang="ru">Баранов А.А., Оливио А.П.</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/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/45007">https://journals.rudn.ru/engineering-researches/article/view/45007</self-uri><abstract xml:lang="en"><p>A modified algorithm is presented for solving the problem of spacecraft rendezvous in a near-circular orbit. The study considers the calculation of maneuver parameters executed on several turns using a low-thrust propulsion system. It is assumed that the active spacecraft performs maneuvers within a predefined region around the target spacecraft, while the perturbative effects of Earth’s gravitational field non-centrality and atmospheric drag are neglected. Well-established approximate mathematical models of spacecraft motion are employed to address the rendezvous problem. The methodology of determining the parameters of maneuvers is structured into three key stages: in the first and third stages, the parameters of impulsive transfer and low-thrust transfer are determined using analytical methods. In the second stage, maneuvers are allocated across the available turns to ensure a successful rendezvous by minimizing a selected control variable. The proposed approach is distinguished by its computational efficiency and robustness, making it suitable for onboard implementation in autonomous spacecraft navigation systems. As a case study, the paper analyzes the dependence of total characteristic velocity required for rendezvous on the magnitude of engine thrust and provides a comparative assessment of the total characteristic velocity for both impulsive and low-thrust maneuvering scenarios.</p></abstract><trans-abstract xml:lang="ru"><p>Представлен модифицированный алгоритм решения задачи сближения космических аппаратов на околокруговой орбите. Рассмотрен расчет параметров маневра, выполняемого на нескольких витках с использованием двигательной установки малой тяги. Предполагается, что активный космический аппарат выполняет маневры в пределах заданной области вокруг целевого космического аппарата, при этом возмущающими эффектами нецентральности гравитационного поля Земли и атмосферного сопротивления пренебрегают. Для решения задачи сближения использованы хорошо зарекомендовавшие себя приближенные математические модели движения космического аппарата. Методология определения параметров маневров структурирована на три ключевых этапа: на первом и третьем этапах параметры импульсной передачи и передачи малой тяги определяются с использованием аналитических методов. На втором этапе маневры распределяются между доступными поворотами, чтобы обеспечить успешное сближение за счет минимизации выбранной управляющей переменной. Предлагаемый подход отличается своей вычислительной эффективностью и надежностью, что делает его пригодным для бортовой реализации в автономных навигационных системах космических аппаратов. В качестве примера в статье анализируется зависимость суммарной характеристической скорости, необходимой для сближения, от величины тяги двигателя и приводится сравнительная оценка суммарной характеристической скорости как для сценариев импульсного маневрирования, так и для маневрирования с малой тягой.</p></trans-abstract><kwd-group xml:lang="en"><kwd>spacecraft rendezvous</kwd><kwd>near-circular orbit</kwd><kwd>velocity impulse</kwd><kwd>maneuver parameters</kwd><kwd>approximate mathematical models</kwd><kwd>low-thrust propulsion</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сближение космических аппаратов</kwd><kwd>околокруговая орбита</kwd><kwd>приближенные математические модели</kwd><kwd>двигательная установка малой тягиг</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Статья подготовлена при поддержке Министерства науки и высшего образования Российской Федерации в рамках выполнения государственного задания по соглашению № 075-03-2024-059 (FSSF-2024-0005).</institution></institution-wrap><institution-wrap><institution xml:lang="en">This paper has been supported by the Ministry of Science and Higher Education of the Russian Federation under Agreement No. FSSF-2024-0005.</institution></institution-wrap></funding-source></award-group><funding-statement xml:lang="en">This paper has been supported by the Ministry of Science and Higher Education of the Russian Federation under Agreement No. FSSF-2024-0005.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке Министерства науки и высшего образования Российской Федерации в рамках Соглашения № FSSF-2024-0005.</funding-statement></funding-group></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Lebedev VN. 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