The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2025
Filed:
Feb. 02, 2021
Japan Aerospace Exploration Agency, Tokyo, JP;
Kaname Kawatsu, Tokyo, JP;
Ai Noumi, Tokyo, JP;
Naoki Ishihama, Tokyo, JP;
Taiichi Nagata, Tokyo, JP;
JAPAN AEROSPACE EXPLORATION AGENCY, Tokyo, JP;
Abstract
A failure diagnostic system for a spacecraft liquid propulsion system having a plurality of thrusters and a supply pipe connected to the thrusters, is used to diagnose a failure in the spacecraft. The 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 frequency spectrum data, a storage unit that stores the frequency spectrum data 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 frequency spectrum data, and a determining unit that determines a failure in any one of the plurality of thrusters based on the comparison.