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Title:
イオン推進システムにおける推進剤移送の推定のための方法およびシステム
Document Type and Number:
Japanese Patent JP6389720
Kind Code:
B2
Abstract:
Methods and systems for estimating propellant transfer in an ion propulsion system (200) are disclosed. One example is a method for estimating transfer of a propellant between a first tank (208) and a second tank (210) in an ion propulsion system during a transfer event. The first tank and the second tank are separated by a valve (216). A flow rate of the propellant through the valve is calculated based on an initial pressure and an initial temperature of each of the first tank and the second tank for a beginning of the transfer event, calculating, based at least in part on the flow rate, a mass of propellant transferred through the latch over a period of time ending at an intermediate time before an end of the transfer event, and determining an intermediate pressure and temperature for each of the first tank and the second tank for the intermediate time.

Inventors:
Lloyd Sea Quoc
Application Number:
JP2014196344A
Publication Date:
September 12, 2018
Filing Date:
September 26, 2014
Export Citation:
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Assignee:
The Boeing Company
International Classes:
B64G1/40; F03H1/00
Domestic Patent References:
JP8100897A
JP9228894A
Foreign References:
US5251852
Other References:
D.C.Fearn,THE PROPOSED DEMONSTRATION OF THE UK-10 ION PROPULSION SYSTEM ON ESA'S SAT-2 SPACECRAFT,controller,Her Majesty's Stationery office,英国,Her Majesty's Stationery office,1988年,pages186-195
Saleem M.R.TAHA,Digital measurement of the mass-flow rate,Sensors and Actuators A, ELESEVIER SEQUOIA S.A., LAUSANNE, CH,ELESEVIER SEQUOIA S.A,1994年11月,vol.45,no.2, 1 Nov 1994
Attorney, Agent or Firm:
Minoru Yoshida
Tatsuya Tanaka
Yasumitsu Suzuki
Nao Usui
Fumiaki Doi
Keita Kobuchi
Shintaro Suzuki



 
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