High-precision and high-efficiency modeling method for interaction of irregular-shape double asteroid systems
A technology of double asteroids and modeling methods, applied in the field of aerospace, can solve problems such as large calculation loads and large quantities, and achieve the effects of improving modeling and prediction accuracy, improving calculation efficiency, and improving modeling efficiency
Pending Publication Date: 2022-01-21
BEIJING INSTITUTE OF TECHNOLOGYGY
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The disadvantage of this method is that the finite element method requires a large number of domain elements to ensure the accuracy, which makes the method have a large computational burden in actual operation
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[0062] In order to better illustrate the purpose and advantages of the present invention, the BIA-1999KW4 double asteroid system is taken as an example below, and the implementation of the present invention will be described in detail in conjunction with the accompanying drawings.
[0063] Such as figure 1 As shown, the high-precision and high-efficiency modeling method for the interaction of irregularly shaped double asteroid systems disclosed in this embodiment, the specific steps are as follows:
[0064] The first step is to establish the composite gravitational field model of the main asteroid, and the composite gravitational field model describes the real gravitational field through the superposition of the nominal gravitational field and the residual gravitational field. Because the residual gravitational field uses a numerical interpolation method, the composite gravitational field model has high numerical calculation efficiency, and can reflect the influence of the une...
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The invention discloses a high-precision and high-efficiency modeling method for interaction of irregular-shaped double asteroid systems, and belongs to the technical field of aerospace. The implementation method comprises the following steps of: establishing a compound gravitational field model of a main planet and an asteroid, and improving the interaction modeling efficiency of the compound gravitational field model through an efficient numerical interpolation method of a residual gravitational field; establishing a sub-asteroid finite element model, and calculating interpolation coefficients of domain element nodes for corresponding domain elements; according to the composite gravitational field model, determining gravitational field parameters of each domain element node in the gravitational field of the major planet and the minor planet; based on the interpolation coefficient and the gravitational field parameters, determining that each secondary asteroid domain element is acted by the main asteroid, and realizing rapid modeling of the interaction of the double asteroid system through domain element superposition; and carrying out interaction rapid modeling according to the state of the current double asteroid system, substituting a modeling result into a kinematic equation to obtain the system state at the next moment, and thus predicting the evolution process of the double asteroid system.
Description
technical field [0001] The invention relates to a double asteroid system interaction modeling method, which is especially suitable for a double asteroid system interaction modeling method involving double asteroid system evolution prediction with high precision and high efficiency, and belongs to the field of aerospace technology. Background technique [0002] Asteroids refer to celestial bodies in the solar system that are similar to planets orbiting the sun, but are much smaller in size and mass than planets, and cannot clear the area near their orbits. It is estimated that there are more than 1.27 million asteroids in the solar system, about 15% of which are binary asteroid systems. How to calculate the interaction force and moment inside the double asteroid system is the key technique for studying the evolution of the double asteroid system. The interaction within the binary asteroid system is one of the hot issues that researchers are currently concerned about. [000...
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IPC IPC(8): G06F30/23G01V7/00G06F119/14
CPCG06F30/23G01V7/00G06F2119/14
Inventor 尚海滨卢榉承韦炳威喻志桐徐瑞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY