An aerodynamically assisted method for capturing periodic orbits of equilibrium points

A periodic orbit and balance point technology, applied in the field of aerospace, can solve the problems that the detector cannot capture the periodic orbit, etc., and achieve the effects of small speed increment, fuel saving, and more capture opportunities

Active Publication Date: 2018-01-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

This method can capture the detector to a circumcircle using a lower velocity incre

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  • An aerodynamically assisted method for capturing periodic orbits of equilibrium points
  • An aerodynamically assisted method for capturing periodic orbits of equilibrium points
  • An aerodynamically assisted method for capturing periodic orbits of equilibrium points

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In order to better illustrate the purpose and advantages of the present invention, the content of the present invention will be further described below with reference to the drawings and examples.

In order to verify the feasibility of the method, the periodic orbit of the equilibrium point under the Sun-Mars system is selected as the capture target orbit. Suppose the probe approaches the hyperbolic residual velocity of Mars v ∞ =2.5km / s, assuming the radius of Mars is r m = 3389km, the height of the Martian atmosphere is 100km, and the angle between the Martian equator and the revolution plane is 25.19°.

As shown in FIG. 1, the method for capturing a balance point periodic orbit based on aerodynamic assistance disclosed in the present invention includes the following steps:

Step 1: Establish the motion equation of the probe under the Sun-Mars centroid rotation system, and determine the position of the balance point of the Sun-Mars-Rover three-body system.

Select the center o...

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Abstract

The invention discloses a method for capturing a periodical orbit of a balance point based on aerodynamic assistance, relates to a method for capturing a periodical orbit of a sun-planet-probe three-body system, and belongs to the technical field of aerospace. The invention establishes the motion equation of the probe under aerodynamic force, and determines the change law of the control amount of the probe moving in the atmosphere, and uses a section of orbit of the probe entering the planetary atmosphere to compare the interstellar transfer orbit with the stable manifold of the balance point periodic orbit. Connection to realize the periodic orbit capture of the planet-sun-probe three-body system. The probe first enters the planetary atmosphere, uses aerodynamic force to assist deceleration, and enters the stable manifold under the planet-sun-probe three-body system when leaving the atmosphere, and glides along the stable manifold to a periodic orbit without power to achieve capture. The invention has the characteristics of extremely small required speed increment, many capture opportunities and high flexibility, and is suitable for capturing periodic orbits of planetary balance points with atmospheres.

Description

An aerodynamically assisted method for capturing periodic orbits of equilibrium points technical field The invention relates to a method for capturing periodic orbits, in particular to a method for capturing periodic orbits under the sun-planet-probe three-body system, which is suitable for the process of a probe entering a periodical orbit of a balance point from an interstellar transfer orbit, and belongs to aerospace technology field. Background technique The equilibrium point is a point with special properties in the sun-planet-probe three-body system, and the objects at the equilibrium point remain relatively stationary relative to the sun and the planets. There is a periodic orbit around the equilibrium point that satisfies certain speed and position constraints near the equilibrium point. Objects on the periodic orbit also maintain a basically constant positional relationship with respect to the sun and planets, and have a relatively stable thermodynamic and electro...

Claims

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Application Information

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IPC IPC(8): G05B13/02
Inventor 乔栋李翔宇崔平远尚海滨韩宏伟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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