High precision propellant filling method for high orbit satellite with parallel-connection flat-laid storage tanks

Abstract

The invention provides a high precision propellant filling method for a high orbit satellite with parallel-connection flat-laid storage tanks. The high precision propellant filling method comprises the steps that before test, a standard weight is used for calibrating a barycenter test board; the satellite is directly mounted on the barycenter test board, and before a propellant is filled, influence, of tools on the periphery of the satellite, on the test is eliminated; in the filling process, the mass and the barycenter of the satellite are directly measured; and after filling, the creeping effect of the barycenter test board is calibrated, and test is conducted again. By adoption of the filling method provided by the invention, the precision of mass test is smaller than 0.6 kg, the precision of barycenter test is smaller than 0.5 mm, the error of satellite filling is decreased, the determination precision, of the transverse barycenter of the satellite, on the ground is increased, a direct basis is provided for determination of the transverse barycenter position of the satellite at the ignition time of an orbit transfer section apogee engine, control over disturbance torque is facilitated, and safe orbit transfer can be ensured.

Description

technical field [0001] The invention relates to the technical field of satellite propulsion, in particular to a high-precision propellant filling method for a high-orbit parallel flat tank satellite. Background technique [0002] During the ignition process of the apogee engine during the orbit change phase of the satellite, when the center of mass of the entire satellite is not on the thrust axis of the apogee engine, a disturbance torque will be generated; with the consumption of propellant, the accuracy of determining the center of mass will become worse, that is, the error will be continuously enlarged, and the apogee engine will produce The disturbance moment will become larger accordingly; for tank parallel tiled satellites, the unbalanced discharge of propellant will further amplify the determination error of the lateral center of mass. At present, when the domestically developed high-orbit satellites are filled with propellant, the propellant ground filling equipment...

AI Technical Summary

Problems solved by technology

Since there are satellites, filling pipelines and propellant inside at the back end of the measuring equipment, it is impossible to eliminate the influence of the filling pipeline connected to the star and the propellant inside, not only the satellite quality measurement The error is relatively large (generally more than 3kg), and the lateral center of mass of the satellite is more difficult to estimate, which brings certain risks to the determination of the lateral center of mass of the satellite sailboard after the orbit change section is deployed, which is not conducive to the control of the disturbance moment

[0003] At present, the only high-orbit satellites in orbit in China that use parallel tiled storage tanks are the Gaofen-4 satellites. Several satellite models under research use parallel tiled storage tanks, but no information has been found throughout the entire propellant filling stage. Systematic approach to assure satellite refueling accuracy reports or techniques

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