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Graph-based hypersonic flight vehicle path modeling method around multiple no-fly zones

A modeling method and hypersonic technology, applied in the direction of instrument, vehicle position/route/height control, non-electric variable control, etc., can solve the problem of inapplicability of the point layout method, and reduce the subjective judgment error and one-sidedness, and the craftsmanship is good. , the effect of method science

Active Publication Date: 2021-08-27
BEIHANG UNIV
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Problems solved by technology

However, for the hypersonic vehicle studied in this patent, the layout of the waypoints should not be too many, otherwise the follow-up trajectory planning cannot pass through the waypoints due to the limitation of dynamics. The grid method and other point distribution methods are not applicable

Method used

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  • Graph-based hypersonic flight vehicle path modeling method around multiple no-fly zones
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  • Graph-based hypersonic flight vehicle path modeling method around multiple no-fly zones

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples of implementation.

[0040] The present invention is a graph-based hypersonic vehicle path modeling method around multiple no-fly zones, the flow chart of which is as follows figure 1 As shown, it includes the following steps:

[0041] Step 1. Obtain the task area:

[0042] The coordinate system is defined as the latitude and longitude coordinate system. The no-fly zone existing in the aircraft re-entry environment is a circular area with infinite height. The center position and radius of the no-fly zone are predetermined. The number of no-fly zones is n, and The position of the center of the circle is sorted from west to east, and the longitude and latitude of the center of the no-fly zone i in the flight area and no-fly zone radius R i As input parameters, i=1, 2, . . . , n.

[0043] In graph theory, the above visual graph can usually be abst...

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Abstract

The invention provides a graph-based hypersonic flight vehicle path modeling method around multiple no-fly zones. The method comprises the specific steps of 1, obtaining a task area; 2, arranging path points; 3, formulating an edge connection strategy, and connecting directed edges; and 4, completing weighted directed graph modeling. Through the above steps, the directed graph model can be constructed based on the graph theory to guide the formulation of an avoidance strategy and path point planning of the hypersonic aircraft around multiple no-fly zones, the overall performance of the flight path is improved, a large quantity of tests and iterations during the artificial design of the avoidance path are avoided, and the efficiency is improved; and the modeling method is scientific and good in manufacturability, and has wide popularization and application values.

Description

technical field [0001] The invention is a graph-based method for modeling the path of a hypersonic vehicle around multiple no-fly zones. It aims at the multi-no-fly zone environment of a hypersonic vehicle, establishes a path model based on graph theory, and selects strategies for subsequent no-fly zone avoidance. A method for providing a basic model belongs to the field of aerospace path planning. Background technique [0002] The reentry flight of a hypersonic vehicle must meet complex constraints, including traditional heat flow rate, dynamic pressure, overload constraints, and terminal constraints, as well as complex no-fly zone constraints caused by natural and military factors. The no-fly zone of the aircraft is a path constraint. If the number of no-fly zones is larger or the distribution is more complex, the difficulty of trajectory planning will be greater. Today's research on no-fly zone penetration is mainly focused on the guidance algorithm. Most of the evasion ...

Claims

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Application Information

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IPC IPC(8): G05D1/10
CPCG05D1/106
Inventor 张冉张源李惠峰
Owner BEIHANG UNIV
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