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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">pimi</journal-id><journal-title-group><journal-title xml:lang="ru">Приборы и методы измерений</journal-title><trans-title-group xml:lang="en"><trans-title>Devices and Methods of Measurements</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-9506</issn><issn pub-type="epub">2414-0473</issn><publisher><publisher-name>BNTU</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2220-9506-2025-16-2-98-108</article-id><article-id custom-type="elpub" pub-id-type="custom">pimi-956</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>Средства измерений</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Measuring instruments</subject></subj-group></article-categories><title-group><article-title>Эволюционный алгоритм искусственного интеллекта для оптимизации обнаружения фаз шага по данным трёхосевого акселерометра, размещённого на стопе</article-title><trans-title-group xml:lang="en"><trans-title>Evolutionary Artificial Intelligence Algorithm for Optimizing Step Phase Detection Based on Foot-Mounted Triaxial Accelerometer Data</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>Хмарский</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khmarskiy</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: Хмарский П.А. – Ин-т прикладной физики Национальной академии наук Беларуси, ул. Академическая, 16, г. Минск 220072, Беларусь e-mail: pierre2009@mail.ru</p></bio><bio xml:lang="en"><p>Address for correspondence: Khmarskiy P.A. – Institute of Applied Physics of the National Academy of Science of Belarus, Akademicheskaya str., 16, Minsk 220072, Belarus e-mail: pierre2009@mail.ru</p></bio><email xlink:type="simple">pierre2009@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт прикладной физики Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Institute of Applied Physics of the National Academy of Science of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>02</day><month>07</month><year>2025</year></pub-date><volume>16</volume><issue>2</issue><fpage>98</fpage><lpage>108</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хмарский П.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Хмарский П.А.</copyright-holder><copyright-holder xml:lang="en">Khmarskiy P.A.</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://pimi.bntu.by/jour/article/view/956">https://pimi.bntu.by/jour/article/view/956</self-uri><abstract><p>Современные технологии захвата движения и анализа его параметров, основанные на использовании инерциальных измерительных модулей, находят всё более широкое применение в различных областях: биомедицинская инженерия, спорт, мониторинг физической активности, эргономика, научные исследования движения и смежные дисциплины. Цель исследования заключалась в разработке и экспериментальной проверке алгоритма автоматического подбора частотных характеристик фильтров и порога обнаружения для повышения точности и надёжности обнаружения фаз шага. Данная задача имеет принципиальное значение не только для объективной реабилитации и мониторинга двигательной активности, но и для задач спортивной аналитики, эргономики, игровых и инженерных разработок, а также научных исследований локомоции. В работе представлен автоматизированный подход к оптимизации параметров обнаружителя фаз шага на основе данных трёхосевого акселерометра, закреплённого на стопе. Реализован эволюционный алгоритм искусственного интеллекта, имитирующий процессы естественного отбора, который обеспечивает автоматический поиск оптимальных параметров обнаружителя шага путём минимизации ошибки между восстановленной с помощью инерциальных измерительных модулей и эталонной (оптической) траекторией, полученной с системой OptiTrack. Подробно описаны механизмы формирования и эволюции популяции параметров, построение целевой функции и методы компенсации дрейфа при интегрировании ускорения. Эксперименты с движением по замкнутому квадратному маршруту подтвердили высокую точность и устойчивость предлагаемого метода: совпадение оптимизированной траектории с эталонной указывает на практическую применимость подхода для точной реконструкции локомоции в различных условиях. Методика легко адаптируется к индивидуальным особенностям движений и может быть интегрирована в современные носимые сенсорные системы для широкого спектра научных и прикладных задач.</p></abstract><trans-abstract xml:lang="en"><p>The aim of this study was to develop and experimentally validate an algorithm for automatic selection of filter frequency characteristics and detection threshold in order to enhance the accuracy and reliability of gait phase detection. This challenge is crucial not only for objective rehabilitation and monitoring of motor activity, but also for sports analytics, ergonomics, gaming and engineering applications, as well as studies of human locomotion. An automated approach for optimizing the parameters of a gait phase detector based on data from a three-axis foot-mounted accelerometer is presented. This work implements an evolutionary artificial intelligence algorithm that mimics natural selection processes, providing automatic search for the optimal gait phase detector parameters by minimizing the error between the trajectory obtained from inertial measurement units and the reference (optical) trajectory acquired using an OptiTrack system. Details are provided regarding the formation and evolution of the parameter population, design of the objective function, and drift compensation methods utilized during acceleration integration. Experiments involving walking along a closed square path confirmed the high accuracy and robustness of the proposed method: the match between the optimized and reference trajectories demonstrates the practical applicability of the approach for precise gait reconstruction under different conditions. The proposed methodology is easily adaptable to individual movement characteristics and can be integrated into modern wearable sensor systems for a wide range of scientific and applied tasks</p></trans-abstract><kwd-group xml:lang="ru"><kwd>обнаружение шага</kwd><kwd>инерциальный измерительный модуль</kwd><kwd>акселерометр</kwd><kwd>эволюционные алгоритмы</kwd><kwd>захват движения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>step detection</kwd><kwd>inertial measurement unit</kwd><kwd>accelerometer</kwd><kwd>evolutionary algorithms</kwd><kwd>motion capture</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">Winter DA, Thomas SJ, Zeni JA. Winter’s Biomechanics and Motor Control of Human Movement. Fifth Edition. Hoboken, NJ: John Wiley &amp; Sons. 2023;384 p.</mixed-citation><mixed-citation xml:lang="en">Winter DA, Thomas SJ, Zeni JA. 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