着陆器倾斜状态对伽玛关机敏感器测高精度的影响分析

Analysis of Impact on γ-Sensor Accuracy of Tilt Position of Lunar Lander

伽玛关机敏感器是月球着陆探测器的低高度敏感器,为了获得在3m左右高度时敏感器的测高精度,文章以着陆模拟器为试验载体,进行了伽玛关机敏感器在着陆器不同倾斜状态下的静态吊高试验,分析了着陆器不同倾斜角度以及水平状态时的计数率差异和关机高度变化情况。通过试验数据分析,获得了伽玛关机敏感器在3m左右的测高精度,着陆器倾斜状态引起的测高精度误差绝对值不大于5.3%。

The γ-sensor realizes low altitude detecting for the lunar lander. To abtain the accuracy of altitude detecting at the height of about 3m, the simulator lander is used to do the experiments with different tilt positions, and the difference of the frequency and the shutdown height between tilt and horizontal state is measured, too. By analysis, the accuracy of altitude detecting with different tilt position at the height of about 3m is achieved. The error caused by tilting is not greater than 5.3%.