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A Graph Theory-Based Path Modeling Method for Hypersonic Vehicle Around Multiple No-Fly Zones

A hypersonic and no-fly zone technology, applied in the direction of instruments, vehicle position/route/altitude control, three-dimensional position/course control, etc., can solve the problem of inapplicable point layout and reduce subjective judgment errors, one-sidedness, and manufacturability Good, the effect of scientific method

Active Publication Date: 2022-05-10
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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  • A Graph Theory-Based Path Modeling Method for Hypersonic Vehicle Around Multiple No-Fly Zones
  • A Graph Theory-Based Path Modeling Method for Hypersonic Vehicle Around Multiple No-Fly Zones
  • A Graph Theory-Based Path Modeling Method for Hypersonic Vehicle 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 present invention provides a graph-based method for modeling the path of a hypersonic vehicle around multiple no-fly zones. The specific steps are as follows: Step 1, obtain the task area; Step 2, arrange the path points; To the edge; step 4, complete the weighted directed graph modeling; through the above steps, the present invention can build a directed graph model based on graph theory, to guide the hypersonic vehicle to circumvent the multi-no-fly zone avoidance strategy formulation and path point planning, Improve the overall performance of the flight trajectory, avoid a large number of tests and iterations when artificially designing avoidance routes, and improve efficiency; the modeling method is scientific, good in manufacturability, and has wide application value.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/10
CPCG05D1/106
Inventor 张冉张源李惠峰
Owner BEIHANG UNIV
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