梅州双偏振雷达天线过冲故障分析
Analysis of Overshoot Fault of Meizhou DualPolarization Radar
中文摘要：
梅州新一代天气雷达升级双偏振后进行业务试运行过程中，天线在运行中大约15 d左右会出现一次天线俯仰冲顶至上限位，显示仰角90°的故障现象，造成雷达不能正常运行。针对梅州雷达多次发生天线俯仰冲顶故障的情况，结合雷达的工作原理、信号流程和电路原理图,对故障成因进行了推断分析，并对维修过程作了详细的介绍，最后对天线冲顶这类常见故障的处理做了分析总结。
中文关键词：
双偏振雷达，交流伺服系统，光纤链路，轴角编码盒
KeyWords：
Dual polarization radar, ac servo system, fiber optic link, shaft Angle coding box
Abstract：
During the business commissioning process after upgrading to the double polarization, the antenna of the new generation of Meizhou weather radar usually pitches to the upper limit once about 15 days or so. This results in a failure phenomenon by showing elevation angle of 90° which causes radar run abnormally. In this paper, we analyze the possible causes of the multiple antenna pitching to upper limit by considering the working principles, signal flow and circuit schematic diagram of the radar. The maintenance process is also introduced in detail. Finally, the processing of common antenna pitching problem is analyzed and summarized.