公开(公告)号：US20220341375A1

公开(公告)日：2022-10-27

申请号：US17753709

申请日：2021-02-02

申请人： JAPAN AEROSPACE EXPLORATION AGENCY

发明人： Kaname KAWATSU ,  Ai NOUMI ,  Naoki ISHIHAMA ,  Taiichi NAGATA

IPC分类号： F02K9/96 ,  G01M99/00 ,  B64G1/66 ,  F02K9/42

摘要： Provided is a failure diagnostic system for a spacecraft liquid propulsion system that enables to accurately diagnose a failure in a spacecraft and a failure diagnostic method for the spacecraft liquid propulsion system. This spacecraft liquid propulsion system includes a plurality of thrusters, and a supply pipe connected to the thrusters. This system includes a pressure sensor that detects an inner pressure of the supply pipe as time-series data, a frequency spectrum conversion unit that converts the time-series data into data of a frequency spectrum, a storage unit that stores data of a frequency spectrum generated based on an analytical model by computer simulation or a test result of a testing device as a data set, a comparator that compares the data set with the data of the frequency spectrum generated by the frequency spectrum conversion unit, and a determining unit that determines a failure in any one of the plurality of thrusters according to a comparison result of the comparator.