大型双曲率雷达天线检测方法研究

On the Calibration Method for a Larget Double-curvature Reflector Antenna

针对某大型双曲率预警雷达天线(4m×8m)提出了比较完整的测量与调整方案。天线三维坐标测量采用了多台电子经纬仪构成的前方交会测量系统,通过最优设站技术,使坐标测量的精度达到±0.1 mm左右,实现了精密、高效的数据采集。在数据处理方面,创造性地提出了修正公共点坐标转换法,使设计坐标系的复现更准确合理;提出了双曲率雷达天线设计坐标的曲线插值方法,实践表明缩短了计算时间;独立研究出了该天线法向偏差的严密计算方法,实现了用法向偏差来评定天线的表面精度。探讨了雷达天线的安装调整方案,提出了系统制造误差的补偿方法和天线主面的调整方法,提出了馈源安装调整方法。通过该文的实践,提高了对大型双曲率天线检测的认知水平。

A complete measurement and adjustment scheme for a large double-curvature reflector antenna is proposed in this paper. Multi-theodolite measuring system is adopted in this scheme, which could obtain an accuracy of coordinate measurement within ±0.1 mm. A new coordinate transformation method, which is called corrected common point coordinate transformation, was firstly proposed to recover the design coordinate system with high accuracy. A curve interpolation method was suggested to find the design coordinates of a measurment point. A normal deviation formula was also firstly derived. Finally, the adjustment scheme was put forward to get a high surface accuracy and precise feed position.