On-track motor plume data acquiring method based on momentum wheel data

Abstract

The invention discloses an on-track motor plume data acquiring method based on momentum wheel data. The on-track motor plume data acquiring method based on the momentum wheel data includes the following steps: constructing a normal three-axis stabilization gesture of a spacecraft, adopting a momentum wheel to be as an executing mechanism of three-axis control, disassembling a magnetic torquer, and confirming gestures of a top and an infrared or star sensor and the like; confirming a start and control position and a time span of air injection of a motor involved in a test, carrying out preparations before the motor works (such as starting of a heater, open of a latching valve); recording data output by the momentum wheel; analyzing a testing result and analyzing disturbing force and moment of force generated by the air injection of the motor according to the momentum wheel data and quality characteristics of the spacecraft. The on-track motor plume data acquiring method based on the momentum wheel data is capable of achieving acquisition of the on-track motor plume data under the condition of high vacuum real environment.

Description

technical field [0001] The invention belongs to the technical field of spacecraft attitude and orbit control, and relates to a method for acquiring on-orbit engine plume data, in particular to a method for acquiring plume based on momentum wheel data. Background technique [0002] The spacecraft is generally equipped with a variety of engines to achieve attitude control and orbit control, such as attitude adjustment, orbit maneuvering, etc. During the operation of the engine, the jet plume may hit the surface of the spacecraft to generate disturbance forces and moments, which will affect the attitude control of the spacecraft Accuracy or track control accuracy, and even more serious effects, such as loss of control. The research shows that to correctly evaluate the effect of the plume on the spacecraft, it is first necessary to accurately describe the vacuum plume field of the engine. There are two main methods for the research of vacuum plume field: numerical simulation me...

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Problems solved by technology

[0007] The shortcomings of the above-mentioned relevant literature are: the numerical simulation results only focus on the optimization of the simulation algorithm. Although the simulation results provided by foreign literature are compared, there is a lack of engineering test data support; the ground test method only simulates the space environment within 100km , using measuring equipment such as pressure sensors, and spacecraft generally operate in a high-vacuum environment of 300km or more, the space environment is different from that within 100km, and the ground test conditions do not meet the high-vacuum environment of spacecraft in-orbit operation

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