基于光电测量的船载测控天线副反射面位置检测

为消除馈源偏焦对天线跟踪性能的影响，首先，介绍了格里高利天线的结构及原理，分析了馈源偏焦对天线性能的影响；其次，采用光电测量原理，提出了基于光学检测的副反射面和馈源相对位置变化检测方法，通过比对测量电压值与标称电压值，从而为判断馈源是否偏焦提供依据，为设备问题的分析判断及故障的排查提供保障；最后，进行了半实物仿真实验，通过实验数据分析，结果表明该方法是有效的。

Shipborne TT&C antenna sub-reflector position detection based on photoelectric measurement

In order to eliminate the influence of feed defocusing on antenna tracking performance,this paper first introduces the structure and principle of the Gregorian antenna and analyzes the influence of feed defocusing on antenna performance. Second,it proposes a new method for detecting the relative position change between sub-reflector and feed based on the principle of photoelectric measurement.Through comparing the measured voltage value with the norminal voltage value,this method provides the basis for judging whether the feed is defocusing or not,so as to support the analysis of equipment problems and investigation of failure. Finally,a semi-physical simulation experiment is carried out,and the results show that the method is effective.