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Aircraft no-fly zone avoidance trajectory planning method based on path point optimization

A technology of trajectory planning and waypoints, applied in the direction of instruments, vehicle position/route/height control, non-electric variable control, etc., to achieve the effect of good manufacturability, strong applicability, and scientific methods

Active Publication Date: 2021-07-09
BEIHANG UNIV
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Problems solved by technology

Other no-fly zone evasion guidance methods need to be based on nominal trajectories, and the selection of nominal trajectories is also a big problem for scenarios with multiple no-fly zones

Method used

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  • Aircraft no-fly zone avoidance trajectory planning method based on path point optimization
  • Aircraft no-fly zone avoidance trajectory planning method based on path point optimization
  • Aircraft no-fly zone avoidance trajectory planning method based on path point optimization

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples of implementation.

[0042] The present invention provides an aircraft no-fly zone avoidance trajectory planning method based on waypoint optimization, the flow chart of which is as follows figure 1 As shown, it includes the following steps:

[0043] Step 1. Way point optimization scheme design;

[0044] Design virtual path points based on the relative positions of each no-fly zone, establish a directed graph model, traverse the feasible flying paths of the aircraft, perform path point tracking guidance for each path, and obtain the path evaluation index through simulation, and calculate the path with the best index The preferred solution as a waypoint.

[0045] First, design virtual path points based on the relative positions of each no-fly zone, and establish upper and lower nodes for each no-fly zone, as the decision point or inflection point o...

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Abstract

The invention provides an aircraft no-fly zone avoidance trajectory planning method based on path point optimization. The method comprises the following specific steps: 1, designing a path point optimization scheme; 2, designing transverse and longitudinal flight profiles; and 3, designing a profile tracking control law and guidance logic. Through the steps, path point selection and trajectory planning of a hypersonic flight vehicle can be realized at the same time, upper-layer task selection and lower-layer planning execution are integrally processed, iteration of a flight profile is reduced, trajectory planning efficiency and overall performance are improved, and good autonomy and universality are achieved; and the method disclosed by the invention is scientific and good in manufacturability, and has wide popularization and application values.

Description

technical field [0001] The invention provides a trajectory planning method for avoiding a no-fly zone of an aircraft based on way point optimization, and belongs to the field of trajectory planning in aerospace technology. Background technique [0002] With the development of tactical weapons, the capabilities of hypersonic vehicles have been enhanced, with the characteristics of fast flight speed, strong maneuverability, and rapid global response. They can adapt to different battlefield tasks and have become the focus of military attention in various countries. In the re-entry gliding segment, the aircraft needs to fly in the atmosphere for a long time, and must meet complex constraints. The no-fly zone avoidance task is a kind of path constraint. If the number of no-fly zones is large and the distribution is complex, the path constraints of trajectory planning The more, the more difficult the trajectory planning will be. [0003] Due to the existence of multiple no-fly zo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/10G05D1/08
CPCG05D1/0808G05D1/106
Inventor 张冉张源李惠峰
Owner BEIHANG UNIV
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