A Method for Calculating Characteristic Parameters of Satellite Power System and Judging Multi-turn Energy Balance

Abstract

A satellite power supply system characteristic parameter calculation and multi-orbit energy balance determination method comprises a satellite power supply system timing function, an orbit counting function and a characteristic parameter calculation function. The power supply system timing function and the orbit counting function complete the accumulation of shadow time and illumination time in a track orbit, remove the deviation influence caused by the moon shadow and complete the accumulation of orbits. The characteristic parameter calculation function is characterized in that parameters reflecting the degradation of the storage battery pack performance, the parameters reflecting the degradation of the solar battery array performance and the parameters used for calculating multi-orbit energy balance are selected, and a calculation method is given. The power supply system timing function and the orbit counting function are the basis of characteristic parameter calculation; by statistics and calculation on the characteristic parameters, key data is provided for on-orbit performance degradation assessment of the storage battery pack and the solar battery array, and the determination of multi-orbit energy balance is completed.

Description

technical field [0001] The invention relates to a method for calculating characteristic parameters of a satellite power supply system and judging multi-circle energy balance, and belongs to the field of on-orbit autonomous management of satellite power supply systems. Background technique [0002] The time it takes for a satellite to circle the Earth is the orbital period T r , usually the orbital period includes the shadow time T sw and light time T sun , the shadow time refers to the time during which the satellite is not exposed to sunlight during the orbital period, and the illumination time refers to the time during which the satellite is exposed to sunlight within the orbital period. When the descending node is in the morning or afternoon, the orbiting satellite will There is a full-sunshine season. In the full-sunshine season, there is only light time in the entire orbital cycle. Due to the positional relationship between the moon and the earth, there will be a moon...

AI Technical Summary

Problems solved by technology

[0005] At present, when evaluating the on-orbit performance degradation of battery packs and solar arrays, due to the large amount of satellite telemetry data, the satellite telemetry data outside the TT&C arc cannot be completely stored and downloaded, and accurate data cannot be obtained under specific conditions. The characteristic parameters of

Since the validity of the data used for performance evaluation cannot be guaranteed, the validity of the evaluation results cannot be guaranteed

[0006] At present, due to the short orbit period of low-orbit small satellites, satellites in sun-synchronous orbits have the characteristics of shadows every circle. Generally, the satellite energy system needs to achieve energy balance within each circle, which limits the mobility of satellite loads. In addition, with the wide application of lithium-ion battery packs on low-orbit small satellites, in order to give full play to its strong charge retention capability and increase the mobility of satellite loads and flexibility, it is necessary to consider the problem of satellite multi-turn energy balance

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