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Research method of spacecraft trajectory safety criterion based on false positive rate

A false positive rate, spacecraft technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as probability dilution, and achieve the effect of eliminating subjective uncertainty

Active Publication Date: 2014-07-02
NAT UNIV OF DEFENSE TECH
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AI Technical Summary

Problems solved by technology

There is a major problem with the safety criterion of probability: when the measurement error is large, there will be a phenomenon of probability dilution
2, marginal probability problem

Method used

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  • Research method of spacecraft trajectory safety criterion based on false positive rate
  • Research method of spacecraft trajectory safety criterion based on false positive rate

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Embodiment Construction

[0076] Application of the present invention:

[0077] 1 Spacecraft trajectory safety analysis under high-speed relative motion (such as the relative motion of satellites and space debris)

[0078] Establish a two-dimensional mathematical model (linear) of the collision probability, the safe set and non-safety of the collision problem in the two-dimensional situation

[0079] 2 Spacecraft under low-speed relative motion (for example, the relative motion in the short-range section of the rendezvous and docking of spacecraft)

[0080] Establish a three-dimensional mathematical model (non-linear) of the collision probability, the relationship of the covariance matrix with time, and then establish

[0081] In the establishment of the mathematical model of collision probability, it is necessary to judge the conditions of the encounter, in the case of high-speed relative motion

[0082] The safe set and non-safe set of collision problems are established. In the case of high-speed relative motio...

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Abstract

The invention discloses a method for researching spacecraft trajectory safety criteria based on misjudgment rate. The method specifically includes: (1) establishing the safe set and non-safe set of the trajectory safety problem through the general model of the trajectory safety problem; (2) establishing the misjudgment rate through the concepts of the safe set and the non-safe set; (3) using The false positive rate is used to modify the trajectory safety criterion. This method can effectively solve the probability dilution phenomenon in the trajectory safety problem, and can solve the problem of large deviation at the edge of the probability density function to a certain extent. It provides a set of judgment and improvement methods for the judgment criteria of the trajectory safety problem, making Judgment criteria can more realistically reflect the actual collision situation.

Description

Technical field of research methods for spacecraft trajectory safety criteria based on false positive rate [0001] The present invention relates to a new concept that can be used to formulate spacecraft trajectory safety criteria-false positive rate. Background technique [0002] Trajectory safety is an important issue in spacecraft motion control. It focuses on how to ensure that the aircraft does not Collide with other flying objects to ensure the safety of the aircraft. [0003] The core of the trajectory safety problem is the selection of appropriate trajectory safety criteria, and there are many choices for trajectory safety criteria. Different ways, one of the important types is based on probability theory, especially the safety criterion of collision probability. Collision based There is a major problem with the safety principle of probability: when the measurement error is large, the probability will be diluted. Probability impulse The weak phenomenon means that when th...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 李海阳王华邱月明何俊辰
Owner NAT UNIV OF DEFENSE TECH
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