【摘要】 光电经纬仪的结构动态特性是设计光电经纬仪的重要依据。用临界转速法建立了光电经纬仪的结构动态特性模型,讨论了光电经纬仪转速与轴系横向振动固有频率的关系:光电经纬仪的临界转速在数值上与经纬仪横向自由振动的固有频率相同,且光电经纬仪的固有频率只与其轴系挠度的平方根成反比。研究表明,提高光电经纬仪伺服控制系统带宽有4个途径:1) 增大光电经纬仪的固有频率;2) 对结构谐振进行补偿;3) 使用电流反馈;4) 使用加速度和速度反馈等。更多还原

【Abstract】 The dynamic structural property of an electro-optical theodolite is an important basis for designing electro-optical theodolite. A dynamic structural property model of electro-optical theodolite is established by critical rotational speed method. The relation between rotational speed of electro-optical theodolite and natural frequency for transverse free vibration of axis system is discussed: the numerical value for critical rotational speed is the same as natural frequency for transverse free vibration of electro-optical theodolite, and natural frequency is only in inverse proportional to square root for axis system flexibility of electro-optical theodolite. The study demonstrates that there are four ways to expand the bandwidth of servo control system of the electro-optical theodolite: 1) Improving the free vibrancy natural frequency of optical-electronic theodolite; 2) To compensate the structural syntony ; 3) Using electric current feedback; 4) Using acceleration and velocity feedback.更多还原