A Planar Natural Capture Method for Equilibrium Binary Asteroid Systems
An Equilibrium, Asteroid Technology for Aerospace Applications
Active Publication Date: 2020-08-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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Although this method can effectively reduce fuel consumption, it still requires auxiliary maneuvers such as small thrust or deep space maneuvers.
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Embodiment 1
[0064] Such as figure 2 As shown, a method for naturally capturing a binary asteroid system in an equilibrium state that satisfies specific conditions disclosed in this embodiment includes the following steps:
[0065] Step 1: Establish the center-of-mass rotating coordinate system of the binary asteroid system.
[0066] Select the center of mass of the binary asteroid system as the origin to establish the center of mass rotating coordinate system. Select the x-axis direction by the main celestial body P 1 The center of mass points to the main celestial body P 2 The center of mass; the z-axis points to the angular momentum direction of the orbital motion of the main celestial body, perpendicular to the main celestial body P 1 with P 2 The orbital plane of ; the y-axis is perpendicular to the plane where the x-axis and z-axis are located, and forms a right-handed rectangular coordinate system with the x-axis and z-axis.
[0067] Step 2: Establish a full three-body dynamic...
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The invention discloses a planar natural capture method for a binary asteroid system in an equilibrium state, which belongs to the technical field of aerospace. The present invention first establishes a center-of-mass rotating coordinate system centered on the center of mass of the double-body asteroid system, and establishes an analytical plane full-three-body dynamics model of the detector in the double-body asteroid system on the basis of the coordinate system; When the binary asteroid system in the equilibrium state naturally captures the orbit, the initial Jacobian integral constant is given, combined with the initial position vector to determine the initial velocity, and the state vector of the detector at the initial moment is obtained; according to the pericentric point judgment method, escape judgment method and The impact judgment method divides the initial state vector area; combined with the requirements of the capture orbit on the number of periapical points before and after capture or before impact, determine the initial state vector set of the capture orbit of the binary asteroid system that meets the specific conditions, and constructs a collection of initial state vectors that meet the specified conditions. The set of capture orbits of the conditions, and then construct the capture orbit.
Description
technical field [0001] The invention relates to a planar natural capture method for a binary asteroid system in an equilibrium state, in particular to a method for realizing natural capture of a binary asteroid system with restrictions on the number of periapsis points in the capture process, and belongs to the field of aerospace technology . Background technique [0002] The minerals rich in small celestial bodies may provide abundant resources for human beings, and the organic matter contained in them will also provide direct information on the origin of life. In the asteroid category, the binary asteroid system has become a hotspot in deep space exploration in recent years because of its dynamic environment and detection value. In the process of asteroid exploration, whether the probe can be successfully captured is the key to the success of the mission. Among all the capture strategies, adopting the natural capture method will help reduce the fuel consumption of the pr...
Claims
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IPC IPC(8): B64G1/10
CPCB64G1/105B64G1/1071
Inventor 乔栋杜燕茹李翔宇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY