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Position maintaining method and system under fault mode of electric thruster of full-electric propulsion satellite

A technology for electric thrusters and failure modes, applied in control/regulation systems, vehicle position/route/altitude control, instruments, etc., can solve problems such as no position maintenance strategy for electric thrusters, inapplicability, etc.

Active Publication Date: 2018-09-04
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not give the position keeping strategy under the failure mode of the electric thruster, and this method is not applicable to the position keeping when the electric thruster of the all-electric propulsion satellite fails

Method used

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  • Position maintaining method and system under fault mode of electric thruster of full-electric propulsion satellite
  • Position maintaining method and system under fault mode of electric thruster of full-electric propulsion satellite
  • Position maintaining method and system under fault mode of electric thruster of full-electric propulsion satellite

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Embodiment Construction

[0061] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0062] figure 2 It is a schematic diagram of the layout of the star electric thrusters used in the embodiment of the present invention. Four electric thrust...

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Abstract

The invention discloses a position maintaining method and system under a fault mode of an electric thruster of a full-electric propulsion satellite. The method comprises the following steps that whencertain electric thruster of the full-electric propulsion satellite has a fault, a branch including the electric thruster is not used any longer, and two electric thrusters in the other branch are used to carry out position maintenance control by that 1) controlled variables needed by essential track factors are calculated according to orbit measurement data; 2) a controlled variable of the totaleccentricity vector is calculated according to a controlled variable of an inclination angle and north-south and east-west position maintaining coupling relation; 3) a drift angle of an electric thruster ignition position is calculated; 4) the ignition speed increment and the middle-point right ascension of an ignition arc are calculated; and 5) ignition time and time length of the electric thruster are calculated. The method and system are suitable for autonomous calculation on the satellite, the problem in maintaining the position in the fault mode of the electric thruster is solved, and thepropellant utilization efficiency is higher.

Description

technical field [0001] The invention belongs to the technical field of satellite orbit attitude dynamics and control, and in particular relates to a method and system for maintaining a position of an electric thruster of an all-electric propulsion satellite in a failure mode. Background technique [0002] All-Electric Propulsion Satellite (All-Electric Propulsion Satellite) uses a high specific impulse electric propulsion system (such as ion electric propulsion or Hall electric propulsion, etc.) Tasks such as satellite transfer orbit change, on-orbit position maintenance after satellite entry, angular momentum unloading, and de-orbiting. For all-electric propulsion satellites, due to the limitation of the number of electric thrusters, installation location, and on-orbit power supply, the east-west, north-south position-keeping controls are coupled with each other, and the control parameters are reduced in the failure mode of the electric thrusters, so the position-keeping st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCG05D1/0825
Inventor 王敏李强袁俊刚胡照梁新刚
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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