摘要
针对测量旋转型亚毫米波天线反射面型面误差精度低的问题,提出了基于三坐标测量机的测量方案。为消除接触测量时球形测头半径的影响,将设计的面天线向测头方向做法向等距面,形成半径补偿后的面天线。以轴向偏差为最小二乘拟合量,利用坐标变换将测量数据由测量坐标系转换到设计坐标系中,转换时考虑了天线反射面的边界约束问题。得到了旋转型天线反射面的型面误差。6次重复性测量得到的型面误差的变化量不超过4μm。
bA measurement method of the surface error of rotating sub-millimetre wave antenna reflector based on CMM is proposed to improve the measurement accuracy.The radius compensation reflector is formed as an offset surface towards the spherical head based on the designed reflector to eliminate the influence of the spherical head. The measurement data in the measuring coordinate system is transformed into the design coordinate system considering the boundary of the reflector in order to get the minimum of the axis deviation.The surface error is obtained at last.A reflector antenna is measured 6 times,and the variation of surface errors is no more than 4 μm.
出处
《无线电工程》
2017年第12期53-55,共3页
Radio Engineering
基金
国际合作与交流基金资助项目(11261140641)
