近地轨道卫星太阳电池阵功率衰减估计

针对LEO(Low Earth Orbit,近地轨道)卫星的太阳电池阵输出功率衰减问题,在分析卫星轨道半长轴、太阳入射角、日地距离等参数变化与影响的基础上,提出按照轨道衰减快慢来区分太阳活动高年与低年,进而通过区分高年与低年,再根据不同季节分别进行太阳电池阵输出功率的衰减估计,而无须做功率归一化。同时,重点关注了夏至前后的最低输出功率的衰减情况,以此作为在轨卫星长期管理中的能源参考,建立平均电流和功率衰减因子估计模型,并结合实际工程数据进行了衰减估计。结果表明,太阳电池阵输出功率的年衰减因子约为-0.012,年衰减率约为1.2%。该结果可应用于在轨卫星长期管理的遥测诊断辅助。

Estimation of Power Attenuation of Solar Arrays of LEO Satellites

A model of mean current was developed to estimate the output power attenuation factor of Low Earth Orbit (LEO) satellites in different seasons and different solar activity years defined by orbit decay, and with no normalization to solar incidence, distance and temperature to determine the output power attenuation of solar cell arrays, based on analysis of the variation and influence of parameters such as semi-major axis, solar incidence and sun-to-earth distance. In Tracking, Telemetry and Command (TT&C) management, the lowest output power supplied to the whole satellite to work in health always takes place near summer solstice and it is a very important satellite energy reference. With TT&C data, the estimation has shown that when it is near summer solstice, the attenuation factor is about -0.012 and annual power attenuation is about 1.2%. The model has already been used to provide assistance to TT&C telemetry diagnosis.