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| Optimization design of theodolite's vertical shaft |
| LEI Cheng-hua,WANG Shou-yin |
| 1.Changchun Institute of Optics,Fine Mechanics and Physics, the Chinese Academy of Sciences， Changchun 130033, China;
2.Graduate School of the Chinese Academy of Science, Beijing 100039, China |
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Abstract Due to the heavy load and big inertia moment of optoelectronic theodolite, its stiffness will directly affect its tracking capability. Therefore, its azimuth resonance frequency shows more importance. Aiming at this situation, by adopting the integrated modeling and simulating function of UG NX4.0, the theodolite's vertical shaft was modeled and simulated, through which its first three-order azimuth resonance frequency and mode shape were obtained. The simulating result satisfies the requirements of practical work and accords with the result of experiment. Moreover, the components with good rigidity were found. Based on the consideration of reducing weight, optimization design was conducted on the components with good rigidity. Under the circumstance of not influencing the overall structure stiffness, the structure was optimized and the weight was lowered.
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Published: 28 August 2008
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光电经纬仪垂直轴系优化设计
光电经纬仪垂直轴系由于负荷重、转动惯量大,其刚度将直接影响经纬仪的跟踪性能,所以它的方位谐振频率显得尤为重要.针对这种情况,采用三维软件UG NX4.0自身的建模仿真一体化功能，对经纬仪垂直轴系进行建模、仿真分析,得到了垂直轴系前三阶固有频率及振型.仿真结果满足实际工作需要,符合试验测定值；并且找到了刚性很好的环节,基于轻量化的考虑,对刚性较好的部件进行尺寸优化设计,在不影响总体结构刚度的情况下,优化了结构,减轻了重量.
关键词：
光电经纬仪,
垂直轴系,
有限元分析
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