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Aircraft trajectory planning safety evaluation method

An aircraft and safety technology, applied in the field of aircraft trajectory planning safety assessment, can solve the problems of accuracy loss and high complexity, and achieve the effects of reducing the loss of accuracy, simplifying calculations, and reducing errors

Active Publication Date: 2019-03-22
BEIHANG UNIV
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Problems solved by technology

But there are also some problems such as loss of accuracy (relative to the target ontology, if it has certain advantages for traditional bounding spheres and axis-aligned bounding volumes), high complexity, etc.

Method used

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Embodiment Construction

[0049] 1. Safety assessment of wreckage landing zone and no-falling zone:

[0050]When judging the safety of the wreckage landing area, the input is spherical data with longitude and latitude as coordinates. First, it is necessary to map these spherical data to a plane, and judge through relevant geometric calculations in the plane. Using the mapping method of projection transformation, it is obvious that when the projection surface is roughly "parallel" to the arc surface surrounded by the wreckage landing area, the error caused by projection is smaller. For this reason, any point can be selected in the arc surface where the wreckage falls, and the tangent plane of this point can be taken as the projection surface on the spherical surface, which can ensure high projection accuracy.

[0051] Make any point on the sphere B=(x B ,y B ,z B ) to the tangent plane, the vertical foot on the tangent plane is the vertical projection point B' of point B on the tangent plane.

[005...

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Abstract

The invention discloses an aircraft trajectory planning safety evaluation method. The method uses a plane ray method to deal with falling debris and a forbidden zone during rocket launching, and dealswith the intersection judgment problem between a trajectory and the spatial forbidden zone by bounding box collision detection and a spatial separation axis theorem, thereby realizing the safety evaluation and trajectory usability detection before the launch of a rocket. The method greatly improves the accuracy of the judgment and simplifies the calculation and improves the efficiency.

Description

technical field [0001] The invention relates to a safety assessment method for aircraft trajectory planning, which belongs to the technical field of rocket trajectory planning and debris safety assessment in the field of aviation and aerospace. Background technique [0002] The wreckage landing area refers to the possible landing area formed on the ground after the rockets of all levels of the ballistic missile are separated from the main rocket body after free fall. The no-fall zone is a pre-set area on the ground that may be composed of cities, industrial areas, military areas, and the like. The safety analysis process of the debris landing area can be modeled as the intersection judgment of multiple regions on the arc surface of the earth and the calculation of the probability of falling into the forbidden area. Due to the improvement of the range of medium and long-range missiles and rockets, the wreckage area and the forbidden area The calculation and intersecting judg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02
CPCG05B13/024
Inventor 周锐张宇航邹亭
Owner BEIHANG UNIV
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