Method of designing injection target point of Mars probe with optimal fuel

Abstract

The invention provides a method of designing an injection target point of a Mars probe with optimal fuel. The method comprises the following steps of firstly, establishing a Mars B plane and transforming a target track constraint to a target point of the B plane; secondly, getting a speed increment which is corrected in the midway by utilizing a differential correcting algorithm, figuring up an equal probability impact ellipse on the B plane according to an injection error, and selecting the injection target point on the ellipse. An injection deviation, which is artificially provided, is eliminated through correcting a cruising section in the midway, so that a selection standard is that the fuel consumed for correcting the injection target point to a final target point is minimized. A plurality of points are selected on the impact probability ellipse, the speed increment required for correcting each point is figured up, then continuous sampling and calculation are carried out near the point with the smallest speed increment, and lastly, the optimal injection target point of the fuel can be approached continuously. According to the method, the probability constraint of the upper-stage impact of the probe or a rocket on the Mars can be met, and meanwhile, the fuel consumption corrected in the midway is optimized.

Description

[0001] technical field

[0002] The invention relates to the orbit design technology of deep space probes, in particular to a method for designing a target point for the orbiting of Mars probes with optimal fuel. Background technique

[0003] In 1966, the United Nations promulgated the "Treaty on Principles Concerning the Activities of States in the Exploration and Use of Outer Space, Including the Moon and Other Celestial Bodies" (referred to as the "Outer Space Treaty"), which formed the basic framework of international space law. The activities of celestial bodies are all bound by it, and our country joined the treaty in 1983. The treaty requires that celestial bodies, including the Earth, should be protected from contamination by harmful substances from other celestial bodies. Since Mars is one of the celestial bodies in the solar system most likely to have signs of life, special precautions must be taken during Mars exploration missions to introduce bacteria from Earth...

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