针对盘形谐振陀螺的机械灵敏度这一关键性能,采用结构优化法对盘形谐振陀螺的谐振环壁厚分布进行了优化。首先基于COMSOL with MATALB实现了盘形谐振陀螺品质因数Q、谐振频率f0、等效质量meff和角度增益Ag的有效计算,估算出了盘形谐振...针对盘形谐振陀螺的机械灵敏度这一关键性能,采用结构优化法对盘形谐振陀螺的谐振环壁厚分布进行了优化。首先基于COMSOL with MATALB实现了盘形谐振陀螺品质因数Q、谐振频率f0、等效质量meff和角度增益Ag的有效计算,估算出了盘形谐振陀螺的机械灵敏度;然后以机械灵敏度为优化目标,采用移动渐近线法对盘形谐振子的谐振环壁厚分布进行了优化。壁厚分布优化使陀螺的机械灵敏度提升了20%。展开更多
Optical fiber coil winding model is used to guide proper and high precision coil winding for fiber optic gyroscope （FOG） application. Based on the large-deformation theory of elasticity, stress analysis of optical f...Optical fiber coil winding model is used to guide proper and high precision coil winding for fiber optic gyroscope （FOG） application. Based on the large-deformation theory of elasticity, stress analysis of optical fiber free end has been made and balance equation of infinitesimal fiber is deduced, then deformation equation is derived by substituting terminal conditions. On condition that only axial tensile force exists, approximate curve equation has been built in small angle deformation scope. The comparison of tangent point longitudinal coordinate result between theory and approximation gives constant of integration, and expression with tangent point as origin of coordinate is readjusted. Analyzing the winding parameters of an example, it is clear that the horizontal distance from the highest point of wheel to fiber tangent point has millimeter order of magnitude and significant difference with fiber tension variation, and maintains invariant when wheel radius changes. The height of tension and accurate position of tangent point are defined for proper fiber guide. For application to fiber optic gyroscope, spiral-disc winding method and nonideal deformation of straddle section are analyzed, and then spiral-disc quadrupole pattern winding method has been introduced and realized by winding system. The winding results approve that the winding model is applicable.展开更多
文摘针对盘形谐振陀螺的机械灵敏度这一关键性能,采用结构优化法对盘形谐振陀螺的谐振环壁厚分布进行了优化。首先基于COMSOL with MATALB实现了盘形谐振陀螺品质因数Q、谐振频率f0、等效质量meff和角度增益Ag的有效计算,估算出了盘形谐振陀螺的机械灵敏度;然后以机械灵敏度为优化目标,采用移动渐近线法对盘形谐振子的谐振环壁厚分布进行了优化。壁厚分布优化使陀螺的机械灵敏度提升了20%。
基金Fundamental Research Funds for the Central Universities (YWF-10-01-B30)
文摘Optical fiber coil winding model is used to guide proper and high precision coil winding for fiber optic gyroscope （FOG） application. Based on the large-deformation theory of elasticity, stress analysis of optical fiber free end has been made and balance equation of infinitesimal fiber is deduced, then deformation equation is derived by substituting terminal conditions. On condition that only axial tensile force exists, approximate curve equation has been built in small angle deformation scope. The comparison of tangent point longitudinal coordinate result between theory and approximation gives constant of integration, and expression with tangent point as origin of coordinate is readjusted. Analyzing the winding parameters of an example, it is clear that the horizontal distance from the highest point of wheel to fiber tangent point has millimeter order of magnitude and significant difference with fiber tension variation, and maintains invariant when wheel radius changes. The height of tension and accurate position of tangent point are defined for proper fiber guide. For application to fiber optic gyroscope, spiral-disc winding method and nonideal deformation of straddle section are analyzed, and then spiral-disc quadrupole pattern winding method has been introduced and realized by winding system. The winding results approve that the winding model is applicable.
