抗震卫星通信地球固定站的设计与研究
Design and Research Regarding Seismic Fixed Satellite Communication Earth Station

传统卫星通信固定站在偏离卫星后不具有自动重新对准卫星功能，以至于在发生地震时会出现地球站天线偏离卫星，从而导致法通信。本文主要研究具有抗震特性的天线伺服系统，在遇到地震时可以及时纠正天线姿态以便重新对准卫星，从而达到短时间恢复通信目的。
In this paper, we mainly investigate the seismic characteristics of the antenna servo system. When a large earthquake occurs, the antenna deviates from the satellite and the system can automatically correct the antenna attitude to re-align the satellite and resume communication in a short time. To overcome the possible azimuth, we have added two calibration devices to this system:the inclinometer and electronic compass. We fixed the inclinometer at the back of antenna surface along the beam direction. Because its output value is absolute, even in the case of antenna tilt or structural distortion, the accuracy will not be affected. We fixed the electronic compass on the antenna base, and its output value can be set as the reference azimuth angle for normal work. This system can ensure the normal use of the fixed satellite communication earth station following any initial accident, and can thus play a positive role in our emergency rescue ability.