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

A technology of control conditions and calibration methods, applied in the directions of adaptive control, general control system, control/regulation system, etc., can solve the problems of increasing fuel consumption measurement and control pressure, limited calibration accuracy, multi-turn, etc., to improve calibration efficiency and The effect of calibration accuracy, improving operating capacity and level, and reducing fuel consumption

Active Publication Date: 2018-08-17
SHANGHAI AEROSPACE CONTROL TECH INST
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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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  • Thruster on-orbit autonomous calibration method under multi-pulse control conditions for formation missions
  • Thruster on-orbit autonomous calibration method under multi-pulse control conditions for formation missions
  • Thruster on-orbit autonomous calibration method under multi-pulse control conditions for formation missions

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Embodiment Construction

[0027] Combine the following Figure 1 ~ Figure 3 , a preferred embodiment of the present invention is described in detail.

[0028] The current research results and on-orbit experience show that when the control accuracy is not high and the semi-major axis is mainly adjusted, it is often only necessary to complete the calibration of the one-way thruster. However, the current control tasks are becoming more and more complex, and the requirements for control accuracy are also getting higher and higher, such as high-precision formation control tasks. At this time, the error caused by the thruster is the main part of the formation control error, but the formation control is often multi-pulse, and there are no applicable research results on thruster calibration under the condition of multi-pulse.

[0029] Such as image 3 As shown, the errors that affect formation control accuracy are divided into two categories according to whether they are proportional to the control amount, n...

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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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 完备杜耀珂沈阳何煜斌崔佳汪礼成贾艳胜朱郁斐吴敬玉
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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