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Moonlet sun array life forecast method based on I-V curve and energy balance

An energy balance and life prediction technology, applied in the field of small satellite solar array prediction, can solve problems such as the inability to solve the problem of solar array life prediction

Inactive Publication Date: 2014-08-13
BEIHANG UNIV +2
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Problems solved by technology

Among them, the ultraviolet accelerated life test method only considers the space environment condition of ultraviolet, and the influence of ultraviolet is relatively weak compared with other factors affecting the life. The law of damage under complex space environment conditions; the thermal strain extreme value method established the data model of the single battery from the test, which is effective for the life prediction of the single battery after the test and only considers the influence of temperature. Solar cells such as batches and different models need to re-establish life prediction models, and the problem of overall life prediction of solar arrays cannot be solved

Method used

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  • Moonlet sun array life forecast method based on I-V curve and energy balance
  • Moonlet sun array life forecast method based on I-V curve and energy balance

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Embodiment 1

[0236] The present invention is a small satellite solar array life prediction method based on the I-V curve and energy balance. The life prediction method regards the solar array performance decline process as the energy balance decline process, thus, taking into account the small satellite operation Under the influence of space environmental factors (including: the distance between the sun and the earth, the orbital shadow time, the angle between the sun's rays and the normal of the sun array, temperature, solar radiation, etc.), a comprehensive life prediction model for solar arrays with good versatility is established. figure 2 Shown is the overall flowchart of the life prediction method of the present invention, and concrete implementation steps are as follows:

[0237] Step 1. Determine the distance factor between the sun and the earth, the orbital earth shadow time, the angle between the sun's rays and the sun array normal;

[0238] According to the orbital altitude, th...

Embodiment 2

[0255] This embodiment takes my country Aerospace HY-1B small satellite solar array as an object, through the detailed elaboration of this embodiment, further illustrates the implementation process and engineering application process of the present invention.

[0256] Step 1. Determine the distance factor between the sun and the earth, the orbital earth shadow time, the angle between the sun's rays and the sun array normal;

[0257] The orbital height of the small satellite is 645km, the local time of the descending node is 15:00PM±30min——according to the orbital altitude, the local time of the descending node and the predicted start time, call the STK software to calculate the sun-earth distance factor F rd , orbital period, orbital earth shadow time, and the variation law of the angle θ(t) between the orbital sun's rays and the solar array normal, and obtain quantitative data that changes with time, which will be used for subsequent solar array output power calculations and e...

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Abstract

The invention provides a moonlet sun array life forecast method based on I-V curve and energy balance. Aiming at the problems that the existing moonlet sun array life forecast method has few damage regularity space environment influencing factors, is limited in life forecast of unit cells to the large extent, cannot forecast the whole life of a sun array, and the like, the moonlet sun array life forecast method is based on space environment simulation tests, and a sun array integral life forecast module is provided taking important space environment factor influence including sun and earth distance factors, track earth shadow time, included angles of sun rays and sun array normals, temperature and sun radiation into account, further the problem of generality of life forecast taking the sun array important life influence factors into account and sun array integral life forecasting suitable for different bathes and different types is solved. The I-V curve is a current and voltage curve of a solar unit cell. The moonlet sun array life forecast method is based on tests, and has good model generality and strong engineering practical applicability.

Description

technical field [0001] The invention belongs to the technical field of small satellite solar array prediction, in particular to a small satellite solar array life prediction method based on I-V curve and energy balance. Background technique [0002] Small satellites are used in all space fields except manned spaceflight, including remote sensing, communication, navigation, technology verification, and space science. The power supply system is the key service system of the satellite, which is responsible for generating, storing and providing stable and uninterrupted energy for the entire satellite power load during the entire life of the satellite. Its power supply capacity and power quality directly affect the working status, reliability and use of the satellite. life. There are high requirements on the performance and reliability of the power system control. [0003] Due to the obvious environmental characteristics of different satellite orbits, the performance degradatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/10
CPCY02E10/50
Inventor 吕琛陶来发刘红梅彭健刘一薇杨生胜
Owner BEIHANG UNIV
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