天线座扭转振动固有频率分析

文中以某转台式天线座为研究对象，首先，采用拉格朗日法创建了考虑系统中电机、减速器和安装平台势能及各主要零部件动能的扭转振动动力学模型，并得到了可用于固有频率计算的解析表达式；其次，基于ADAMS建立了面向实体的动力学模型并进行仿真分析，求得的固有频率与理论分析结果吻合。该方法可为天线座的动态性能分析提供参考。

Analysis of Torsional Vibration Natural Frequency of Antenna Pedestal

A turntable antenna pedestal is taken as the research object in this paper. Firstly, the Lagrangian method is used to create a torsional vibration dynamic model that considers the potential energy of the motor, reducer and installation platform as well as the kinetic energy of each main component in the system. And an analytical expression is obtained that can be used to calculate the natural frequency. Then, an entity-oriented dynamic model is established based on ADAMS for simulation. The natural frequency obtained from simulation is consistent with the theoretical analysis results. This can provide reference for the dynamic performance analysis of the antenna pedestal.