航空学报 > 2018, Vol. 39 Issue (3): 221624-221624   doi: 10.7527/S1000-6893.2017.21624

一种半球谐振陀螺谐振子动力学建模方法

徐泽远1, 伊国兴1, 魏振楠1, 赵万良2   

  1. 1. 哈尔滨工业大学 航天学院, 哈尔滨 150001;
    2. 上海航天控制技术研究所, 上海 201109
  • 收稿日期:2017-07-24 修回日期:2017-11-17 出版日期:2018-03-15 发布日期:2017-11-17
  • 通讯作者: 伊国兴,E-mail:ygx@hit.edu.cn E-mail:ygx@hit.edu.cn
  • 基金资助:
    总装预研重点基金(9140A09012015HT01026);"十三五"预研基金(41417060101)

A dynamic modeling method for resonator of hemispherical resonator gyro

XU Zeyuan1, YI Guoxing1, WEI Zhennan1, ZHAO Wanliang2   

  1. 1. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China;
    2. Shanghai Aerospace Control Technology Research Institute, Shanghai 201109, China
  • Received:2017-07-24 Revised:2017-11-17 Online:2018-03-15 Published:2017-11-17
  • Supported by:
    National Defense Pre-research Key Foundation (9140A09012015HT01026); The 13th Five-year Pre-research Foundation (41417060101)

摘要: 准确完备的半球谐振陀螺(HRG)谐振子动力学模型是陀螺误差分析的基础。为建立半球壳谐振子动力学模型,基于弹性力学薄壳理论,提出了一种谐振子动力学建模方法。首先,在薄壳的弹性力学几何方程基础上,推导了半球壳谐振子的变形几何方程。其次,在提高受力分析计算精度的基础上,推导了半球壳谐振子的物理方程。然后,分析了谐振子中面的受力平衡关系,推导了谐振子的平衡微分方程。最后,基于以上对整个谐振子的动力学分析,建立了谐振子动力学方程。根据谐振子的不同外载荷形式,利用布勃诺夫-伽辽金法求解得到谐振子2阶谐振状态动力学模型,并得到了谐振子比例系数和2阶谐振频率的表达式。通过对比验证可以看出,参数计算值与实测数据结果一致,证明了所建立的动力学模型的准确性。

关键词: 半球谐振陀螺, 半球壳谐振子, 薄壳理论, 动力学模型, 布勃诺夫-伽辽金法

Abstract: The accurate and complete dynamic model for the hemispherical shell resonator is the basis of error analysis of the Hemispherical Resonator Gyro (HRG). A dynamic modeling method for the hemispherical shell resonator is proposed based on the thin shell theory of elasticity. First, the deformation geometry equation for the hemispherical shell resonator is derived based on the elasticity geometry equation for the thin shell. Second, based on the improvement of calculation accuracy of force analysis, the physical equation for the hemispherical shell resonator is developed. After an analysis of the force equilibrium relationship for the middle surface of the resonator, the equilibrium differential equation for the resonator is obtained. Finally, based on the above dynamic analysis of the whole resonator, the dynamic equation for the resonator is established. After an analysis of the external load forms of the resonator, the second-order resonant dynamic model for the resonator is obtained by using the Bubnov-Galerkin method, and the expressions for the proportion coefficients and second-order resonant frequency of the resonator are also obtained. Comparison shows that the calculation results are consistent with the measured data, proving the accuracy of the dynamic model proposed.

Key words: hemispherical resonator gyro, hemispherical shell resonator, thin shell theory, dynamic model, Bubnov-Galerkin method

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