To provide a failure diagnostic system for a spacecraft liquid propulsion system and a failure diagnostic method for a spacecraft liquid propulsion system, which can accurately diagnose failure of a spacecraft.SOLUTION: A spacecraft liquid propulsion system includes a plurality of thrusters and supply pipes connected to the thrusters. A failure diagnostic system for the spacecraft liquid propulsion system comprises: a pressure sensor that detects pressure in the inside of the supply pipe as time series data; a frequency spectrum conversion part that converts the time series data to frequency spectrum data; a storage part that stores the frequency spectrum data created based on an analytic model by a computer simulation or a test result of a testing device, as a data set; a comparison part that compares the data set with the frequency spectrum data created by the frequency spectrum conversion part; and a determination part that determines failure in any of the plurality of thrusters according to a comparison result of the comparison part.SELECTED DRAWING: Figure 2

    【課題】宇宙機の故障を的確に診断することができる宇宙機液体推進システムの故障診断システム、及び宇宙機液体推進システムの故障診断方法を提供する。【解決手段】この宇宙機液体推進システムは、複数のスラスタと、スラスタに接続される供給管とを備える。このシステムは、供給管の内部の圧力を時系列データとして検出する圧力センサと、時系列データを周波数スペクトルのデータに変換する周波数スペクトル変換部と、コンピュータシミュレーションによる解析モデル又は試験装置の試験結果に基づいて生成された周波数スペクトルのデータをデータセットとして記憶する記憶部と、データセットを周波数スペクトル変換部が生成した周波数スペクトルのデータと比較する比較部と、比較部の比較結果に従い、複数のスラスタのいずれかにおける故障を判定する判定部とを備える。【選択図】図2


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    Title :

    FAILURE DIAGNOSTIC SYSTEM FOR SPACECRAFT LIQUID PROPULSION SYSTEM, AND FAILURE DIAGNOSTIC METHOD FOR SPACECRAFT LIQUID PROPULSION SYSTEM


    Additional title:

    宇宙機液体推進システムの故障診断システム、及び宇宙機液体推進システムの故障診断方法


    Contributors:
    KAWATSU KANAME (author) / NOMI AI (author) / ISHIHAMA NAOKI (author) / OSADA TAIICHI (author)

    Publication date :

    2021-08-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02K JET-PROPULSION PLANTS , Strahltriebwerke / B64G Raumfahrt , COSMONAUTICS / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL



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