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低軌衛星空間操控中的一種載荷休眠方法
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航天器在軌故障診斷與維修重點(diǎn)實(shí)驗室

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V556.1

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Space Operation for LEO Satellite Payload Hibernation
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    摘要:

    針對某低軌衛星應用中應答機老化下的載荷延壽問(wèn)題,在關(guān)聯(lián)應答機AGC、載波鎖定、溫度等遙測參數基礎上,詳細討論空間環(huán)境效應下的應答機溫度變化規律及其對載波鎖定的影響,提出一種應答機高溫時(shí)期的應急操控方法,即通過(guò)發(fā)送單指令對電源下位機進(jìn)行復位,使其進(jìn)入最小模式工作,從而使載荷進(jìn)入休眠狀態(tài),同時(shí)實(shí)現星內器件快速降溫,可拓寬上行遙控信道的時(shí)間窗口,便于衛星操控。在軌檢驗結果表明,電源下位機復位后,應答機可在24h內降溫超過(guò)5.3°C;72h后,應答機溫度可穩定在21.0°C以下;電源最小模式下的載波鎖定時(shí)長(cháng)優(yōu)于400s,滿(mǎn)足操控需求。在冬季應答機最低溫度超過(guò)26.2°C時(shí),可利用應急操控啟動(dòng)載荷進(jìn)入冬眠模式,在度過(guò)高溫期后再恢復載荷工作,實(shí)現衛星在軌延壽。

    Abstract:

    With respect to payload life extension to LEO (Low Earth Orbit) satellite, transponder ageing is a key point. Based on the correlation to the transponder telemetry parameters containing AGC (Auto Gain Control), carrier locking and temperature, details on thermally sensitized transponder characteristics are discussed accompanied by space environment effects on carrier locking. An emergent operation is presented to rapidly lower the satellite device temperature and to hibernate the payloads by resetting the power computer to run into the minimum mode in which the uplink telecommand window is broadened to easily recover the satellite status from the anomaly and load business data. The on-orbit validated results have shown that after the power computer reset, the temperature drop is more than 5.3°C in 24 hours and the temperature is stabilized below 21.0°C in 72 hours, and the carrier locking time is beyond 400s to satisfy the operation demands for the degraded application of transponder. For the purpose of life extension to the satellite on-orbit, the minimum mode is candidate for winter operation to hibernate the payloads and keep the uplink when the temperature is above 26.2°C, and the power computer can come back into the normal mode to run the payloads when that is below 26.2°C.

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李強,韓冰,楊輝文,韓海濤,張朋,王司晨,郭靜.低軌衛星空間操控中的一種載荷休眠方法計算機測量與控制[J].,2020,28(4):110-115.

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  • 收稿日期:2019-09-26
  • 最后修改日期:2019-09-26
  • 錄用日期:2019-10-18
  • 在線(xiàn)發(fā)布日期: 2020-04-15
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