Thruster on-orbit autonomous calibration method under multi-pulse control conditions for formation missions

Abstract

The invention relates to an in-orbit autonomous calibration method of a thruster on a formation task multi-pulse control condition. The method comprises: S1, during a satellite operation process, a relative navigation result is determined after completion of current formation keeping control, so that an offset after formation keeping control is calculated; S2, according to the relative navigation result, a relative semi-major axis is calculated; S3, on the basis of the relative semi-major axis and a current formation keeping control strategy, a minimum value of an objective function is calculated, thereby obtaining a thrust calibration coefficient in next formation keeping control; S4, according to the thrust calibration coefficient in next formation keeping control and a formation keeping control strategy, a next practical formation keeping control quantity is generated, thereby completing next formation keeping control; and S5, the steps from S1 to S4 are repeated to realize long-term in-orbit autonomous calibration of a thruster. Therefore, multi-direction thruster calibration can be realized simultaneously on the complicated task condition; the calibration efficiency and the calibration precision can be improved obviously; the fuel consumption is reduced; and the autonomous operation capability and level of the satellite are improved.

Description

technical field [0001] The invention relates to an on-orbit autonomous calibration method for a thruster, in particular to an on-orbit autonomous calibration method for a thruster under the multi-pulse control condition of a formation mission. Background technique [0002] With the continuous development of satellite technology, more and more countries and organizations are gradually inclined to use multiple satellites to form a distributed satellite system to achieve space mission goals. Therefore, the control task of the distributed satellite system will become more and more complex, and at the same time, it will also face the pressure of high control precision and autonomy. [0003] On-orbit autonomous calibration of thrusters is a supporting technology to improve satellite control accuracy and autonomy. At the same time, the thruster calibration of the distributed satellite system is more complicated than that of the traditional single satellite. The main reason is that...

AI Technical Summary

Problems solved by technology

If the conventional single-satellite ground-based calibration method is used, that is, the positive and negative thrusters are calibrated separately before control, on the one hand, it takes up more laps, and the calibration accuracy is limited, which affects the working efficiency of the payload; on the other hand, additional The fuel consumption and the measured and controlled pressure on the ground

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