船载雷达光轴晃动对修正参数标定的影响

摘要

Optical axis of calibration telescope and television on ship-borne radar will jitter in different de-gree along with the antenna state and the amplitude can reach a magnitude of minute. When calibrating ra-dar’ s zero position and shafting with the reverse method,considerable errors will be produced. So in this paper,a method of judging jitter existing or not is put forward,which detects the not-parallel degree in re-verse and positive direction separately between the optical axis of calibration telescope and televisions. In the meantime,the method of calculating optical axis jitters accurately with geodetic results and its model are provided,which meet the precision requirement of calibration. Consequently,the improved data processing model of correlative correction parameters such as pitching zero position, pitching photoelectric deviation and gravity droop error of antenna,etc,is presented while optical axis jittering.%船载雷达标校望远镜光轴、标校电视光轴在天线不同状态下会产生不同程度的晃动，可达角分量级，在利用反向法标定雷达零位和轴系误差时，会给标定结果带来较大误差。针对此问题，提出了通过分别检测天线在正向、反向状态下标校望远镜光轴与标校电视光轴间不平行度以判定光轴是否存在晃动的方法，同时提出了利用大地测量成果精确解算光轴俯仰晃动量的方法，给出了解算模型，试验表明解算精度满足雷达标校要求。在此基础上给出了当光轴存在俯仰晃动时，俯仰零位、俯仰光电偏差、天线重力下垂误差等相关参数标定的改进数据处理模型。