| Summary: | 碩士 === 國立交通大學 === 機械工程系 === 88 === In this thesis, we analyzed this vibrating ring gyroscope using the finite element program ANSYS 5.3. The analyses we performed were divided mainly into three categories, the modal analysis, the static analysis and the thermal analysis. In the modal analysis, we obtained the two vibration flexural mode shapes, which is n=2, of this structure. We also obtained the frequencies of these two flexural modes. In the static analysis, we established the relations between the sensitivity of the structure and the geometry parameters including the width, the radius and the thickness. Besides, we also obtained the stress distribution of this structure and the ratio between the displacement along z-axis and the one along x or y-axis. In the thermal analysis, we discovered that the displacement of the structure due to thermal expansion is thousand times the one due to electrostatic force. To solve this problem, we designed a mechanism and changed the dimensions of the structure to decrease the displacement of the structure due to thermal expansion. Through these analyses, we designed the dimensions of this structure and changed the shape of the connection points between the ring and the spring to accomplish the demand of the analytical results.
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