摘要
目前,小卫星电源分系统大多采用太阳电池阵-蓄电池组的联合供电模式。三结砷化镓太阳电池凭借高转换率、高可靠性的优势,已广泛用作小卫星在光照区运行的唯一供电单元;锂离子蓄电池的长寿命、高能量密度特性,也使其逐步替代镉镍、氢镍电池作为小卫星的储能单元。文章通过分析某小卫星的三结砷化镓太阳电池、锂离子蓄电池组的数学模型和电源控制器的逻辑模型,结合在轨运行的温度、光照及衰减情况,建立电源分系统的SIMULINK仿真模型,得到仿真曲线,并将仿真数据与星上遥测数据对比。研究结果表明,在忽略入影、出影时太阳反照使得温度骤变的情况下,该小卫星的遥测值与模型的仿真结果相符,表明该仿真模型真实有效。
At present, power subsystems of small satellites mostly adopt the combined power mode of Solar Array and Battery pack.GaInP2/GaAs/Ge solar cells have been widely used due to their advantages of high conversion efficiency and high reliability, while Lithium-Ion batteries are gradually replacing cadmium nickel and hydrogen nickel batteries on board due to their long service life,high energy density and portability.In this paper,by analyzing the mathematical model of a small satellite’s GaInP2/GaAs/Ge solar cell,Lithium-Ion battery pack and the logical model of the power controller,combined with the on-orbit operation of the temperature, light and attenuation, the establishment of the SIMULINK simulation model of power subsystem, simulation curves were also obtained.The simulation data are compared with the satellite telemetry data.Ignoring the temperature changes due to the solar reflection when entering or leaving the shadow restrict,the research results show that the telemetry data of the small satellite is consistent with the simulation results of simulation model.Thus,the simulation model is true and effective.
作者
付宇
崔玉福
李志刚
刘元默
FU Yu;CUI Yufu;LI Zhigang;LIU Yuanmo(DFH Satellite Co. LTD,Beijing 100094,China)
出处
《空间电子技术》
2019年第4期56-67,88,共13页
Space Electronic Technology
