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Autonomous and accurate orbit maintaining method for ultra-low orbit satellite

A technology of satellite orbit and ultra-low orbit, which is applied to artificial satellites, satellite radio beacon positioning systems, instruments, etc., and can solve problems such as inability to maintain satellite orbits and kilometer-level errors

Pending Publication Date: 2022-07-22
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The technical problem solved by the present invention is: the satellite semi-major axis determined based on the GPS channel plate data has a kilometer-level error under the influence of measurement noise, and cannot be directly used for satellite orbit maintenance

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  • Autonomous and accurate orbit maintaining method for ultra-low orbit satellite
  • Autonomous and accurate orbit maintaining method for ultra-low orbit satellite
  • Autonomous and accurate orbit maintaining method for ultra-low orbit satellite

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Embodiment Construction

[0069] The atmospheric resistance of ultra-low-orbit satellites can reach tens of millinewtons, which accumulates for a long time and has a great impact on satellite orbits; the satellite flat semi-major axis determined based on GPS channel plate data has kilometer-level errors under the influence of measurement noise, which cannot be directly For satellite orbit maintenance.

[0070] The invention is based on the basic idea of ​​"autonomous on-board" orbit maintenance, and without the constraints of high-precision accelerometers on atmospheric resistance measurement, the satellite-borne GPS data filtering is used to solve the orbit in real time, and the average processing eliminates the flat semi-major axis caused by high-order perturbation. The fluctuation term determines the size of the atmospheric drag according to the change of the flat semi-major axis and corrects and compensates the thrust in real time, realizing the high-precision autonomous maintenance of the ultra-low...

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Abstract

The invention provides an ultra-low orbit satellite orbit autonomous accurate maintenance method, which adopts a Kalman filtering algorithm to realize accurate acquisition of an orbit flat semi-major axis, and adopts an average method to eliminate a flat semi-major axis fluctuation item caused by earth high-order perturbation to acquire a meter-scale precision flat semi-major axis; under the condition that atmospheric resistance acceleration measurement is carried out without an accelerometer, the atmospheric resistance is determined through the change of the flat and semi-major axis, and meanwhile, the orbit control thrust is corrected and compensated in real time according to the determined atmospheric resistance, so that the problems of accurate acquisition of the meter-scale precision flat and semi-major axis of the ultra-low orbit satellite and autonomous and accurate orbit maintenance control of real-time correction of the orbit control thrust are solved.

Description

technical field [0001] The invention belongs to the field of spacecraft orbit control, and relates to an autonomous and precise maintenance method of an ultra-low orbit satellite orbit. Background technique [0002] The influence of ultra-low orbit satellite orbit attenuation mainly comes from atmospheric resistance. At present, there are two main control methods for low orbit and ultra-low orbit maintenance: one is to assume that the reference satellite is only affected by the earth's gravitational force. The problem is transformed into the formation maintenance problem of satellite formation flight for optimization; another non-drag orbit control technology is to use accelerometers, atmospheric composition detectors and other spaceborne instruments to measure atmospheric drag acceleration, and to compensate atmospheric drag by applying control force. Orbit Keeping Method. [0003] The first method of ultra-low orbit maintenance transforms the control problem of ultra-low ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/10B64G1/24G01S19/42G01S19/52
CPCB64G1/10B64G1/242G01S19/42G01S19/52
Inventor 李克行罗通刘洁龚立纲王淑一姚宁魏春岭何英姿丁建钊杨鸣黄盘兴严晗龚宇莲
Owner BEIJING INST OF CONTROL ENG
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