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Space target collision early-warning distance calculation method based on UT (Unscented Transformation)

A collision warning and space target technology, applied in computing, special data processing applications, instruments, etc., can solve the problem of poor accuracy of early warning collision distance and achieve the effect of improving estimation accuracy

Active Publication Date: 2018-06-22
NO 63921 UNIT OF PLA
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AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of poor accuracy of early warning collision distance in traditional numerical methods, the present invention provides a space object collision early warning distance calculation method based on UT transformation, which can improve the estimation accuracy of space object collision early warning distance

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  • Space target collision early-warning distance calculation method based on UT (Unscented Transformation)
  • Space target collision early-warning distance calculation method based on UT (Unscented Transformation)
  • Space target collision early-warning distance calculation method based on UT (Unscented Transformation)

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Embodiment Construction

[0036] The present invention is described in detail below.

[0037] The basic idea of ​​the present invention: first, according to the theoretical ballistic and deviation ballistic data at a certain moment, adopt UT transformation to calculate the initial trajectory sigma point set of the space object, then calculate the space object predicted trajectory set according to the space object dynamic model, and finally The deviation between the trajectory and the theoretical trajectory and the corresponding weights are used to calculate the mean and variance of the space target collision warning distance.

[0038] Specific steps are as follows:

[0039] Step 1. According to the theoretical trajectory and deviation trajectory data at a certain moment, adopt UT transformation to calculate the initial trajectory sigma point set of the space target;

[0040] Unscented Transformation (abbreviated as UT) transformation is to use the statistical parameter information of the known random ...

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Abstract

The invention provides a space target collision early-warning distance calculation method based on UT (Unscented Transformation). The method can improve space target collision early-warning distance estimation precision, and includes: using UT to calculate a starting track Sigma point set of a space target according to a theoretical trajectory and deviation trajectory data; using the Sigma point set as input of a space target dynamics model, and calculating a predictive trajectory set of the space target; and calculating a mean and variance of space target collision early-warning distance according to deviations of predictive trajectories in the trajectory set and the theoretical trajectory and corresponding weight values, wherein the mean of the distance is the space target collision early-warning distance.

Description

technical field [0001] The invention belongs to the technical field of space object collision early warning, and in particular relates to a space object collision early warning distance calculation method based on UT transformation. Background technique [0002] In space launch missions, the main tasks of space target collision warning are launch window selection, theoretical ballistic safety analysis and real-time ballistic safety analysis, in which the main parameter is the space target collision warning distance. Due to the existence of perturbation factors, there is an error between the actual trajectory of the target entering the space and the theoretical trajectory. In order to avoid harm to other space targets, it is necessary to adopt certain means to avoid it according to the early warning collision distance, such as adjusting the launch window or adjusting the trajectory . At present, the calculation of early warning collision distance generally adopts the numeric...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 江晓东孙刚陈宜稳康建勇王洪刚
Owner NO 63921 UNIT OF PLA