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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">novtexmech</journal-id><journal-title-group><journal-title xml:lang="ru">Мехатроника, автоматизация, управление</journal-title><trans-title-group xml:lang="en"><trans-title>Mekhatronika, Avtomatizatsiya, Upravlenie</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1684-6427</issn><issn pub-type="epub">2619-1253</issn><publisher><publisher-name>Commercial Publisher «New Technologies»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17587/mau.20.624-628</article-id><article-id custom-type="elpub" pub-id-type="custom">novtexmech-707</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>ДИНАМИКА, БАЛЛИСТИКА И УПРАВЛЕНИЕ ДВИЖЕНИЕМ ЛЕТАТЕЛЬНЫХ АППАРАТОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DYNAMICS, BALLISTICS AND CONTROL OF AIRCRAFT</subject></subj-group></article-categories><title-group><article-title>Новый аналитический алгоритм определения ориентации БИНС</article-title><trans-title-group xml:lang="en"><trans-title>The New Analytical Algorithm for Determining the Strapdown INS Orientation</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>Молоденков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Molodenkov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р техн. наук, вед. науч. сотр.</p></bio><bio xml:lang="en"><p>Dr. of Tech. Sciences, Leading Researcher, Laboratory of Mechanics, Navigation and Motion Control</p></bio><email xlink:type="simple">iptmuran@san.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>Сапунков</surname><given-names>Я. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sapunkov</surname><given-names>Ya. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, ст. науч. сотр.</p></bio><email xlink:type="simple">iptmuran@san.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>Молоденкова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Molodenkova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, доц.</p></bio><email xlink:type="simple">moltw@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт проблем точной механики и управления РАН<country>Россия</country></aff><aff xml:lang="en">Precision Mechanics and Control Problems Institute, RAS<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Саратовский государственный технический университет им. Ю. А. Гагарина<country>Россия</country></aff><aff xml:lang="en">Saratov State Technical University<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>10</day><month>10</month><year>2019</year></pub-date><volume>20</volume><issue>10</issue><fpage>624</fpage><lpage>628</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Commercial Publisher «New Technologies», 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Commercial Publisher «New Technologies»</copyright-holder><copyright-holder xml:lang="en">Commercial Publisher «New Technologies»</copyright-holder><license xlink:href="https://mech.novtex.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://mech.novtex.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://mech.novtex.ru/jour/article/view/707">https://mech.novtex.ru/jour/article/view/707</self-uri><abstract><p>На основе полученного точного решения приближенного (усеченного) уравнения для вектора конечного поворота твердого тела с помощью квадратур решена задача определения кватерниона ориентации твердого тела при произвольном векторе угловой скорости и малом угле поворота твердого тела. Исходя из этого решения предложен следующий подход к построению нового аналитического алгоритма для вычисления ориентации твердого тела с помощью БИНС: 1) по заданным компонентам вектора угловой скорости твердого тела на основе взаимно-однозначных замен переменных в каждый момент времени вычисляется новый вектор угловой скорости некоторой новой введенной системы координат; 2) используя новый вектор угловой скорости и начальное положение твердого тела, с помощью квадратур находится точное решение приближенного линейного уравнения для вектора конечного поворота с нулевым начальным условием; 3) по вектору конечного поворота определяется значение кватерниона ориентации твердого тела (БИНС). Отметим, что при построении алгоритма ориентации БИНС на каждом последующем шаге замена переменных учитывает предыдущий шаг алгоритма таким образом, что начальное значение вектора конечного поворота твердого тела каждый раз будет нулевым. Поскольку предлагаемый алгоритм аналитического решения приближенного линейного уравнения для вектора конечного поворота твердого тела является точным, он носит регулярный характер при всех угловых движениях твердого тела.</p></abstract><trans-abstract xml:lang="en"><p>The analytical solution of an approximate (truncated) equation for the vector of a rigid body finite rotation has made it possible to solve the problem of determining the quaternion of orientation of a rigid body for an arbitrary angular velocity and small angle of rotation of a rigid body with the help of quadratures. Proceeding from this solution, the following approach to the construction of the new analytical algorithm for computation of a rigid body orientation with the use of strapdown INS is proposed: 1) By the set components of the angular velocity of a rigid body on the basis of mutually — unambiguous changes of the variables at each time point, a new angular velocity of a rigid body is calculated; 2) Using the new angular velocity and the initial position of a rigid body, with the help of the quadratures we find the exact solution of an approximate linear equation for the vector of a rigid body finite rotation with a zero initial condition; 3) The value of the quaternion orientation of a rigid body (strapdown INS) is determined by the vector of finite rotation. During construction of the algorithm for strapdown INS orientation at each subsequent step the change of the variables takes into account the previous step of the algorithm in such a way that each time the initial value of the vector of finite rotation of a rigid body will be equal to zero. Since the proposed algorithm for the analytical solution of the approximate linear equation for the vector of finite rotation is exact, it has a regular character for all angular motions of a rigid body).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>аналитическое решение</kwd><kwd>алгоритм</kwd><kwd>ориентация</kwd><kwd>вектор конечного поворота</kwd><kwd>произвольная угловая скорость</kwd><kwd>твердое тело</kwd><kwd>БИНС</kwd><kwd>кватернион</kwd></kwd-group><kwd-group xml:lang="en"><kwd>analytical solution</kwd><kwd>algorithm</kwd><kwd>orientation</kwd><kwd>vector of finite r otation</kwd><kwd>arbitrary angular velocity</kwd><kwd>rigid body</kwd><kwd>strapdown INS</kwd><kwd>quaternion</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при поддержке гранта РФФИ 19-01-00205.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>This work was supported by the RFBR grant 19-01-00205.</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">Molodenkov A. 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