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Collision probability calculation method based on cube model

A technology of collision probability and calculation method, which is applied in the field of calculation of space object collision probability, can solve problems such as missing collision probability, reduce calculation amount, etc., achieve more accurate analysis results, improve rationality and credibility, and make analysis results reasonable and credible Effect

Inactive Publication Date: 2017-11-28
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

The advantage of the Cube model is that by dividing the space into cubes, N-body fragment systems can be quickly paired, which greatly reduces the amount of calculation; its disadvantage is that it omits the calculation of the collision probability between space objects in adjacent cubes. The collision probability will be even greater than the collision probability between two objects in the same cube

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  • Collision probability calculation method based on cube model
  • Collision probability calculation method based on cube model
  • Collision probability calculation method based on cube model

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Embodiment Construction

[0029] The present disclosure calculates the collision probability between space objects through fast pairing of space objects. This method is suitable for the assessment of the collision probability of the space debris system in the long-term evolution process. In the present disclosure, considering the collision between space objects, it can be regarded as a collision between air molecules, and the probability of collision between space objects is estimated according to gas dynamics. The collision probability between air molecules follows a Poisson distribution.

[0030] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] The embodiment of the present disclosure provides a collision probability calculation method based on a cube model, see figure 1 ,include:

[00...

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Abstract

The invention provides a collision probability calculation method based on a cube model. The method comprises the following steps that: dividing a terrestrial space into cubic grids, and numbering the cube; calculating the position of a space object and the number of the cube where the space object is positioned; carrying out pairing on the space object, and taking the space object in an adjacent and same cube as a pairing target; and calculating a collision probability between targets. By use of the method, consideration for a collision possibility for the adjacent cube space objects is increased to make up a defect that an original cube model can miss a collision situation, an improved cube model more conforms to physical reality, and an analysis result is more reasonable and credible.

Description

technical field [0001] The present disclosure relates to the field of calculating the collision probability of space objects, in particular to a method for calculating the collision probability based on a cube model. Background technique [0002] The increasing amount of space debris has triggered international research on the long-term stability of the space environment. The development of computer technology makes it possible to simulate the long-term evolution of N-body systems. In the evolution of the space debris system, it is necessary to consider the mechanism of the increase and decrease of debris. Correspondingly, an algorithm that can use the constantly updated debris orbit data to calculate the collision probability is needed. NASA developed a collision probability algorithm called the "Cube" model. The core idea of ​​the Cube model is that in the long-term evolution of the space debris system, the system is sampled every certain time dt, at the sampling time, t...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 王晓伟刘静崔双星杨志涛
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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