基于多面体和靶标的转台运动精度测量方法研究

Research on Measurement Method of Turntable Motion Accuracy Based on Polyhedron and Target

针对工程实际中环扫天线转台的运动精度测量问题,设计一种基于多面体法和靶标法结合的运动精度直接测量法。采用“电子经纬仪+靶标”与“平面度检测仪+正多面棱体”组合搭建测量系统的方法,实现分别对转台输出主轴和旋转变压器轴的角位移检测;研究该方法的测量原理与实施步骤并对方法的不确定度进行分析。该方法相较于常规间接测量方法可以减少数据转换过程中的误差,增加测试结果的可信性。通过某环扫天线转台展开测试,实验结果表明:该方法能满足转台运动精度测量需求,具有易操作、高精度的特点。

Aiming at the motion accuracy measurement problem of the scanning antenna turntable in engineering practice,designs a direct motion accuracy measurement method based on the combination of polyhedron method and target method.The method of combining"electronic theodolite+target"and"planarity detector+positive polyhedral prism"is adopted to realize the detection of the angular displacement of the turntable output spindle and the rotary transformer shaft respectively,the measurement principle and implementation steps of the method are studied and the uncertainty of the method is analyzed.Compared with conventional indirect measurement methods,the designed method can reduce errors in the data conversion process and increase the credibility of test accuracy.The experimental results from the test by a scanning antenna show that this method,being easy for operation and with high accuracy,can meet the needs of motion accuracy measurement of the turntable.