Orbit design methods for the detection and return of near-Earth asteroids by manned spacecraft

Abstract

The invention relates to an orbit design method for detecting and returning a near-earth asteroid by a manned spacecraft, comprising the following steps: S1, acquiring an intersection point of the spacecraft and the target asteroid according to the first orbit characteristic of the target asteroid; S2, calculating the first true proximal angle of the Earth when the spacecraft escapes from the Earth and transfers to the transition orbit; S3. calculating a first velocity increment for the spacecraft to escape from the Earth and transfer to the transition orbit, and a second velocity increment for the spacecraft to rendezvous with the target asteroid from the transition orbit; S4. acquiring a third true proximity angle of the asteroid when the spacecraft flies away from the asteroid and transfers to the return orbit, and calculating a fourth true proximity angle of the Earth when the spacecraft enters the Earth's gravitational range from the return orbit; S5, calculating a third velocityincrement for the transfer of the spacecraft from the target asteroid to the return orbit and the reentry velocity of the spacecraft into the atmosphere when the spacecraft enters the Earth's gravitational range from the return orbit; S6. calculating the total velocity increment and the total time of flight of the spacecraft.

Description

technical field [0001] The invention relates to the technical field of deep space exploration transfer orbits, in particular to an orbit design method for a manned spacecraft to detect and return near-Earth asteroids. Background technique [0002] Asteroid detection helps to explore the formation and evolution process of the universe. The detection of near-Earth asteroids is more helpful to protect the earth from the impact of potentially threatening asteroids. It has become the development direction of deep space exploration. So far, a total of 8 unmanned probes in the world have detected asteroids to varying degrees, such as fly-bys, orbits, and sampling returns. This includes the flyby detection of the "Tutatis" asteroid by my country's "Chang'e-2" probe. [0003] When asteroid exploration develops to a certain stage, human participation is required to give full play to human subjective judgment, creativity and flexibility, and to better carry out exploration activities ...

AI Technical Summary

Problems solved by technology

At present, the research on the orbit design method for manned near-Earth asteroid exploration is still in the exploratory stage

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