中继卫星在轨自动跟踪精度测试方法研究  

Study on Method of Data Relay Satellite In-orbit Auto-tracking Accuracy Test

作　　者：王珊珊[1] 余晓川[1] 关鹏 冯海浪 WANG Shanshan;YU Xiaochuan;GUAN Peng;FENG Hailang(China Academy of Space Technology (Xi’an), Xi’an 710100, China)

机构地区：[1]中国空间技术研究院西安分院,西安710100

出　　处：《航天器工程》2019年第2期112-118,共7页Spacecraft Engineering

摘　　要：针对中继卫星在轨自动跟踪精度测试基准值建立和有效数据获取的难题,根据在天线电轴跟踪零点附近角误差电压灵敏度正比于波束指向角误差灵敏度的特性,提出了采用角误差电压灵敏度作为基准值,天线稳定跟踪目标时的方位角误差电压和俯仰角误差电压作为测试数据,通过数据处理得出在轨自动跟踪误差,然后与差波束零点(天线电轴)与和波束接收信号最大值轴之差相加,得出在轨自动跟踪精度的测试方法。并制定测试方案和测试流程,在轨进行了实施。与地面测试结果进行比较,数据相近,验证了测试方法的可行性和有效性。采用该方法测试难度小,便于实施,测试结果不受天线安装误差、卫星姿态变化等因素的影响,解决了中继卫星在轨自动跟踪精度测试的难题。Aiming at the problem of establishing the test benchmark value of in-orbit auto-tracking accuracy for data relay satellite and obtaining effective data, according to the characteristic that the angle error voltage sensitivity near the tracking zero of the antenna axis is proportional to the beam pointing angle error sensitivity, a test method of in-orbit auto-tracking accuracy is proposed. The method uses the error voltage sensitivity as the benchmark value and the error voltages when the antenna stably tracks the target as the test data, then obtains the results by data processing, and the in-orbit auto-tracking accuracy is obtained by adding the angle difference between the zero of the difference beam and the maximum axis of the sum beam. The test method and scheme are carried out and implemented in-orbit. Compared with the ground test results, the data are comparable, which verifies the feasibility and validity to the method. It is easy to test with this method, and the test results are not affected by error of antenna installation, satellite attitude changes and other factors. The problem of in-orbit auto-tracking accuracy test for data relay satellite is solved.

关 键 词：中继卫星 在轨 自动跟踪精度测试 角误差电压灵敏度 

分 类 号：V556.8[航空宇航科学与技术—人机与环境工程]