Geometric-programming-based gliding aircraft terminal area energy management trajectory planning method

A terminal energy management and trajectory planning technology, applied in three-dimensional position/channel control and other directions, can solve problems such as poor practicability

Active Publication Date: 2015-06-17
NORTHWESTERN POLYTECHNICAL UNIV
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AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor practicability of the existing gliding vehicle terminal energy management trajectory pla

Method used

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  • Geometric-programming-based gliding aircraft terminal area energy management trajectory planning method

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Embodiment Construction

[0045] refer to Figure 1-5 . Taking the RLV aircraft as an example, the specific steps of the energy management trajectory planning method at the end of the gliding aircraft based on geometric programming in the present invention are as follows:

[0046] 1. Establish a coordinate system.

[0047] There are several different approach methods for the gliding aircraft in the initial state of TAEM. Based on the airport coordinate system, the aircraft approaches from four different quadrants. In order to facilitate the trajectory planning of the terminal energy management section, the airport coordinate system is established first: the origin is the airport coordinate position, the x-axis points to the northeast direction at 45° along the direction of the airport and is positive, the y-axis is perpendicular to the local horizontal plane, and the z-axis and the x-axis and y-axis form Right-handed coordinate system. The initial conditions of the TAEM section of the aircraft: alti...

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Abstract

The invention discloses a geometric-programming-based gliding aircraft terminal area energy management trajectory planning method which is used for solving the technical problem that an existing gliding aircraft terminal area energy management trajectory planning method is poor in practicability. According to the technical scheme, on the basis of the state of an aircraft entering a TAEM section, a geometric programming method is utilized for rapidly planning a reasonable and feasible TAEM plane trajectory; on the basis of the TAEM plane trajectory planning, height deduction is performed, and therefore a complete trajectory planning strategy is given. Due to the fact that the aircraft enters an entry of an automatic landing section in a spiral-line mode in the geographic planning process, the sudden overload change phenomenon is effectively avoided, and therefore the requirement for the aircraft maneuverability is lowered; meanwhile, during trajectory planning, the state of the aircraft at the TAEM section at the initial moment is considered, corresponding flight paths are planned in a classified mode for the entering state of the aircraft, the reasonable trajectory can be rapidly planned, the requirements for different entering directions are met, and the planning speed is high through simulation verification.

Description

technical field [0001] The invention relates to a trajectory planning method for energy management at the terminal of a gliding vehicle, in particular to a trajectory planning method for energy management at the terminal of a gliding vehicle based on geometric programming. Background technique [0002] The Terminal Area Energy Management (TAEM) segment refers to a flight state of the aircraft from the starting point of the re-entry segment to the starting point of the automatic landing segment. At this stage, the aircraft needs to adjust its altitude and speed to meet the landing requirements, so that the aircraft can land on the designated landing field smoothly. At this stage, the aircraft is in an unpowered flight state, and the flight state of the aircraft can only be adjusted through the aerodynamic rudder, and its maneuverability is limited. Therefore, how to plan the flight trajectory reasonably so that the aircraft can accurately and quickly meet the requirements of ...

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Application Information

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IPC IPC(8): G05D1/10
Inventor 周军卢青王欢呼卫军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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