光电经纬仪载车振动特性分析  

Analysis of Optical Theodolite Car's Vibrate Features

作　　者：王守印[1] 王晓明[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光机电信息》2011年第12期26-31,共6页OME Information

摘　　要：光电经纬仪载车是经纬仪的承载和运输平台,它的振动特性直接影响经纬仪性能的稳定性。为提高光电经纬仪的稳定性及有效使用时间,有必要对光电经纬仪载车振动特性进行优化设计。本文在分析载车振动环境的基础上,对载车的振动系统模型进行了简化,理论推导出简化后的载车振动系统数学模型。然后依据工程实际进行了跑车试验,在选取的3个特征点处采集振动特性数据并进行分析。试验结果表明,在正常行车情况下经纬仪发生多级谐振,高频(8～16Hz)分量振动强度较大,最大振动加速度达到7.9m/s2。高频振动将对经纬仪的精度产生不利的影响,尤其是对质量较小、结构刚度较差的经纬仪影响更大。最后,提出抑制光电经纬仪载车高频谐振的方法,达到减小载车振动对光电经纬仪稳定性的影响。The car is a platform which the theodolite set out carrying and transporting, the vibration characteristics of the car directly affects the stability of theodolite. To improve the stability of theodolite and effective using time, it is necessary to optimize the design of the vibration characteristics of the car. Firstly, the analysis set out on the basis of vehicle vibration, the vibration of the system of loading model was simplified to derive the simplified mathematical model of vibration system for the cars. And then sports car tests based on engineering were conducted, and three characteristic points of data collection were selected and the vibration characteristics were analysed. The results showed that under normal operating conditions, the theodolite occured multi-level resonance, high-frequency（8-16 Hz） component had a larger vibration strength, the maximum aceeleration was 7.9 m/s2. The high frequency vibration will adversely affeet the accuracy of the theodolite, espeeially for the smaller quality, less stiffness theodolite. Finally, the method of inhibition high-frequency resonant optical theodolite was put forward to reduce the inpact of vibration on the loading stability of theodolite.

关 键 词：振动 频率 载车 加速度 

分 类 号：TH761.1[机械工程—仪器科学与技术]