gyroscopyГироскопия и навигацияGiroskopiya i Navigatsiya / Gyroscopy and Navigation0869-70352075-0927AO «Концерн «ЦНИИ «Электроприбор»10.17285/0869-7035.0057gyroscopy-164Research ArticleСтатьиГибридный резонатор твердотельного волнового гироскопа с высокой добротностью: конструкция с использованием термоупругого демпфирования, исследование чувствительности и определение характеристикThermoelastic Damping Based Design, Sensitivity Study and Demonstration of a Functional Hybrid Gyroscope Resonator for High Quality FactorШармаН. Г.SharmaG.N.

Шарма Н. Гириш. Научный сотрудник

Sharma, G.N. 

СундарараджанТ.SundararajanT.

Сундарараджан Т. Научный сотрудник

Sundararajan T. 

СингхГаутам СачинSinghG.S.

Сингх Гаутам Сачин. Старший преподаватель

Singh, G.S. 

Индийская организация космических исследований, подразделение инерциальных систем (г. Тируванантапурам, Керала).ИндияISRO Inertial Systems Unit, Thiruvananthapuram, Kerala, IndiaIndiaКосмический центр им. Викрама Сарабхаи (г. Тируванантапурам, Керала).ИндияVikram Sarabhai Space Centre, Thiruvananthapuram, Kerala, IndiaIndiaИндийский технологический институт (г. Гувахати)ИндияIndian Institute of Technology, Guwahati, IndiaIndia2021260920252917096Copyright © Шарма Н., Сундарараджан Т., Сингх Г., 20252025Шарма Н., Сундарараджан Т., Сингх Г.Sharma G., Sundararajan T., Singh G.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gyroscopy.ru/jour/article/view/164

Важнейшим элементом твердотельного волнового гироскопа является механический резонатор, обладающий высокой добротностью. В работе рассматривается влияние термоупругого демпфирования на добротность. Для решения данной многогранной эксплуатационной задачи, относящейся к области колебаний, механики твердого тела, теплопередачи и термодинамики, используется метод конечных элементов. Основное внимание в статье уделяется зависимости добротности от свойств материала, рабочей температуры и размеров, позволяющих получить требуемую конфигурацию резонатора. По результатам изучения рабочих параметров, таких как эффективная масса и коэффициент преобразования угловой скорости в кориолисово ускорение, предложена гибридная полусферически-цилиндрическая конфигурация резонатора. Уникальность данной работы состоит в исследовании влияния на добротность ультратонкопленочного покрытия (объемная концентрация 0,01%), вариантов и различных комбинаций покрытий. Покрытие способно снижать добротность на несколько порядков в сравнении с непокрытым резонатором. Выяснилось, что выбор материала покрытия и его конфигурация являются очень важными факторами. Другой значимый аспект данной работы – изготовление и подробное описание характеристик гибридного резонатора из кварцевого стекла, на трехмерные поверхности которого наносится тонкопленочное золотое покрытие для получения прецизионных характеристик. После нанесения покрытия производится сверхтонкая балансировка до уровня единиц мГц. Измерение добротности резонатора с нанесенным покрытием выполнено методом лазерной доплеровской виброметрии. Достигнутый уровень добротности окончательной версии функционального гибридного резонатора составляет несколько миллионов единиц.

The most critical element of Hemispherical Resonator Gyroscope (HRG) is the high quality factor (Q-factor) mechanical resonator. This paper discusses the role of thermoelastic damping (TED) on effective Q-factor. Finite element method (FEM) is used to solve this highly coupled field problem involving vibration, solid mechanics, heat transfer and thermodynamics. The major contribution of this paper is the sensitivity analysis of the effect of material property, operating temperature and dimensions to arrive at macro scale resonator configuration. Hybrid hemispherical-cylindrical configuration is proposed by studying the performance parameters such as effective mass and angular gain. The uniqueness of the present work is the sensitivity study of ultra thin film coating (volume fraction of 0.01%), coating variations and different coating configurations. The coating can reduce the Q-factor by a few orders compared to uncoated shell. It has been found that coating material selection and coating configuration are very important factors. Another significance of the present work is the realization and detailed characterization of the hybrid fused silica resonator. Thin film gold coating is done on the 3D surfaces of the realized precision resonator. Detailed coating characterization is carried out using sophisticated instruments. Very fine balancing to the order of a few mHz is achieved after coating. Q-factor measurement of the coated resonator is carried out using LDV and achieved a few millions in the final functional hybrid resonator.

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The authors declare that there are no conflicts of interest present.