Propellant surplus measuring method based on multi-source data fusion

Abstract

The invention discloses a propellant surplus measuring method based on multi-source data fusion. The method comprises the steps of during orbital transfer, independently calculating a real-time propellant consumption estimation value by adopting a BK method and a PVT method according to pressure and temperature remote measurement parameters of a propulsion system; through historical data, acquiring variance data corresponding to the BK method and the PVT method at the current moment through a time domain estimation method; according to a least square method, obtaining weighting coefficients ofthe BK method and the PVT method according to a variance estimation value, and calculating to obtain a current propellant consumption optimal estimation value; and subtracting the optimal consumptionestimation value from the propellant mass before orbital transfer to obtain the propellant surplus at the current moment. According to the invention, real-time data fusion of various propellant surplus measuring methods is realized, and the propellant surplus measuring precision is improved.

Description

technical field [0001] The invention relates to a technology for measuring the remaining amount of propellant of a spacecraft, in particular to a method for measuring the remaining amount of propellant based on multi-source data fusion. Background technique [0002] With the development of spacecraft technology, especially the use of long-lived satellites, higher and higher requirements are placed on the level of on-orbit management during the life of the spacecraft. For satellites in geostationary orbit, the amount of propellant carried is the main factor restricting the life of the satellite, and propellant prediction will also affect the off-orbit operation of the satellite. An important task of management. [0003] For the orbit transfer phase, the commonly used propellant remaining measurement methods for satellites include BK (book-keeping) method, PVT (pressure, volume, temperature) method, ultrasonic flowmeter method, etc. The PVT method and the BK method are the e...

AI Technical Summary

Problems solved by technology

Among them, the measurement uncertainty of the PVT method is relatively large, and the measurement accuracy of the BK method is relatively high, but it relies on the integral method, so there is a cumulative error

Obviously, using a single calculation method is lacking in long-term measurement accuracy

In practical applications, the method with the highest measurement accuracy is generally used as the main measurement method, and the remaining methods are used for review, which cannot further improve the measurement accuracy of the propellant remaining amount to meet the high requirements of modern spacecraft on-orbit management during its life.

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