Thrust on-orbit calibration test method

Abstract

The invention discloses a thrust on-orbit calibration test method, belongs to the technical field of spacecraft electric propulsion, and can solve the problem that an existing on-orbit calibration test method is relatively large in deviation, so that the control precision of a micro thruster on an orbit is relatively low. The method comprises the following steps: when the number of running turns of a satellite is an even number of turns, applying thrust to the satellite to obtain a non-thrust acting ring and a thrust acting ring of the satellite; obtaining a thrust estimated value range of thethruster according to the average orbit semi-major axis of the thrust-free action ring and the thrust action ring adjacent to the thrust-free action ring; obtaining prediction positions of all sampling points according with the thrust estimation value range according to the orbit dynamics model; according to the prediction positions and the actual measurement positions of all the sampling pointsin each thrust application time period, obtaining a thrust optimal estimation value in each thrust application time period; and obtaining thrust calibration information of the thruster according to the thrust optimal estimation value. The on-orbit calibration test method is used for on-orbit calibration of the thrust of the satellite thruster.

Description

Technical field[0001]The invention relates to a thrust on-orbit calibration test method, which belongs to the technical field of spacecraft electric propulsion.Background technique[0002]With the development of aerospace technology, modern small satellites have gradually shown advantages such as light weight, miniaturization, low cost, high functional density and cost-effectiveness. Nano satellites have become an important part of the space system. At present, Nanostar already possesses attitude control capabilities, but few orbit control micro-propulsion systems that can enter engineering applications are mostly in the development or flight test stage. The thrust performance of the micro thruster is very important. However, due to the difference between the ground test environment and the space environment, the thrust of the micro thruster must be tested on orbit. However, the existing on-orbit calibration test methods are mostly cumbersome and have large deviations, which results i...

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Problems solved by technology

[0003] The invention provides a thrust on-orbit calibration test method, which can solve the problem that the existing on-orbit calibration test method is relatively cumbersome and has large deviations, which leads to low control precision of the micro-thruster on the orbit

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