Orbit maintaining method of ultra-low orbit satellite

Abstract

The invention discloses an orbit maintaining method for an ultra-low orbit satellite. The method comprises the steps: setting satellite parameters and atmospheric parameters, building an orbit dynamics model according to the satellite parameters and the atmospheric parameters, and enabling the satellite parameters to comprise satellite orbit parameters, satellite basic parameters and initial satellite orbit control parameters; an optimization model is constructed, the initial satellite orbit control parameters are optimized according to the optimization model, the orbit dynamics model, the satellite orbit parameters and the satellite basic parameters, optimized orbit control parameters are obtained, and the optimization model comprises a plurality of optimization constraint conditions; According to the optimized orbit control parameters, an air suction type propulsion system is controlled to collect air and exhaust the air, so that orbit maintenance of the ultra-low orbit satellite is realized. The technical problem that in the prior art, an ultra-low earth orbit satellite is difficult to maintain in orbit for a long time is solved.

Description

technical field [0001] The application belongs to the technical field of satellite communication, and relates to an orbit maintenance method of an ultra-low orbit satellite. Background technique [0002] Compared with traditional satellites, ultra-low orbit satellites have the advantages of short revisit period, high resolution of optical imaging reconnaissance, low power consumption of radar imaging reconnaissance load, and strong survivability. Broad application prospects. However, due to the high air concentration in the ultra-low orbit and the strong perturbation effect of atmospheric resistance, the orbit of the satellite decays rapidly, the life of the satellite is severely restricted, and it needs to carry a large amount of fuel for orbit maintenance, which makes the satellite not capable of being in orbit for a long time. ability to run. Therefore, atmospheric drag is a major technical problem hindering the orbit maintenance and wide application of ultra-low orbit ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by this application is: Aiming at the problem that ultra-low-orbit satellites in the prior art are difficult to maintain on orbit for a long time, this application provides an orbit-maintenance method for ultra-low-orbit satellites based on an air-breathing propulsion system. In the scheme provided, the ultra-low orbit atmosphere is used as the working medium of the propulsion system, and the air-breathing electric propulsion system is used to convert it into thrust to compensate for the energy loss caused by atmospheric resistance; at the same time, the air intake of the air-breathing arc section is guaranteed Achieve in-orbit balance with the amount of gas consumed in the propulsion arc section, and overcome the problem that ultra-low orbit satellites are difficult to maintain in orbit for a long time

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