Application of FEA and laser measurer for optimization design of FOG
-
摘要: 应用有限元单元法对光纤陀螺结构进行了振动摸态仿真,利用Polytec-PS200激光测振仪实现了陀螺的高精度测振.发现振动环境中结构的共振是影响陀螺精度的主要因素之一.验证了合理的结构可有效地提高光纤陀螺在振动环境中的精度——优化后的陀螺在相同振动环境中零漂减小了65％.Abstract: The vibration stability of FOG(fiber-optic gyroscope) is one of the most important factors in design. With the theories of vibration analysis and finite element analysis (FEA), the natural frequency, vibration modes and dynamic analysis were calculated and simulated by ANSYS5.7. The FOG's vibration modes, within 0~5 kHz, were measured with Polytec-PS200 vibration meter. Compared with the FOG's output characteristic under the vibration, the relation had been found between components' vibration characteristic and the vibration stability of FOG. An optimization structure of FOG was provided based on the research results. It's null shift output was minished about 65%.
-
Key words:
- vibration /
- finite elements /
- fiber optic gyroscopes /
- optimization
-
[1] Hervé C Lefèvre. 光纤陀螺仪[M]. 张桂才,王 巍译. 北京:国防工业出版社,2002 Hervé C Lefèvre. The fiber-optic gyroscope[M]. Translated by Zhang Guicai, Wang Wei. Beijing:National Defence Industry Press,2002(in Chinese) [2] Ewins D J. Modal testing:theory and practice[M]. Research Studies Press Ltd, 1995 [3]Steinberg D. Vibration analysis for electronic equipments . New York:Wiley and Sons, 1988 [4]Wu J, Zhang R R,Radons S. Vibration transmissibility of printed circuit boards by calibrated FEA modeling . MIT Conference on Computational Fluid and Solid Mechanics, Vol.1 Elseviser Science Ltd, 2001. 758~760 [5]Towers D P, Buckberry C H, Stockley B C, et al. Measurement of complex vibrational modes and surface from a combined system[J]. Measur Sci Technol, 1995, 6:1242~1249 [6]Shellabear M C, Tyrer J R. Application of ESPI to three-dimensional vibration measurements[J]. Opt Lesers Engng, 1991, 15:43~56 -
点击查看大图
计量
- 文章访问数: 2246
- HTML全文浏览量: 115
- PDF下载量: 960
- 被引次数: 0
下载:
