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A control method for tropospheric intermittent gliding flight

A technology of gliding flight and control method, which is applied in the field of flight control, can solve the problems such as no efficient use of updraft flight control method, and achieve the effects of easy research and simulation analysis, improved space time and range, and good universality

Active Publication Date: 2018-03-06
BEIHANG UNIV
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Problems solved by technology

However, the current research has mainly verified the feasibility of the aircraft using the updraft through experiments, and has not proposed a flight control method that efficiently utilizes the updraft

Method used

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  • A control method for tropospheric intermittent gliding flight
  • A control method for tropospheric intermittent gliding flight
  • A control method for tropospheric intermittent gliding flight

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0095] Assume that there are two updrafts in the flight area of ​​the aircraft, the position and range distribution are as follows Figure 5 As shown, the maximum air velocity at the center of the updraft is 3m / s. According to formula (2), the Gaussian distribution function describing the updraft is:

[0096]

[0097] Select a certain type of UAV, its main parameters are as follows:

[0098] Wingspan:

[0099] A six-degree-of-freedom nonlinear model of the UAV is established according to formula (9), and the nonlinear equations of longitudinal and lateral decoupling are given according to formulas (13) and (15). According to the linearization of small disturbances, the linearization model of the longitudinal and lateral directions of the UAV is obtained:

[0100]

[0101]

[0102] The control law is designed using the LQR method as follows:

[0103]

[0104] In the updraft area, according to the control method of the next constraint of the optimal enve...

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Abstract

The invention discloses a troposphere intermittent gliding flight control method and belongs to the flight control technical field. The troposphere intermittent gliding flight control method is particularly applied to an aircraft to increase flight time or range of the aircraft by reasonably using updrafts in a troposphere region. The method includes the following steps that: step one, heat updraft modeling and judgment are carried out; step two, aircraft modeling is carried out, and a control law when updrafts do not exist is designed; and step three, intermittent gliding flight control is carried out. According to the control method of the invention, atmospheric energy is utilized to perform intermittent gliding flight, and therefore, the flight time and range of the aircraft can be improved, and the control method has important significance for the aircraft to realize long-flight time, long-range and attack patrol operational goals. The control method of the invention can be widely applied to small-sized unmanned aerial vehicles and small-sized cruise missiles, and can effectively improve the combat effectiveness of the unmanned aerial vehicles and cruise missiles.

Description

technical field [0001] The invention relates to a tropospheric intermittent gliding flight control method, which belongs to the technical field of flight control, and in particular to a modeling control method suitable for an aircraft to rationally utilize an updraft in tropospheric flight to realize improvement of air time and range. Background technique [0002] Large birds use air energy to help them fly, improving flight time and distance. Inspired by this phenomenon in nature, manned gliders have long been known to use atmospheric energy to increase their time in the air, or flight distance, but research into unmanned aerial vehicles isn't that far off. In the early 21st century, Michael J. Allen of NASA Dryden Flight Research Center and others established an updraft model in desert areas in order to study the benefits of unmanned aerial vehicles in this type of updraft . Subsequently, Klas Andersson and others also verified the feasibility of using updraft energy to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/04
Inventor 吴森堂邢智慧卜凡姚征贾翔
Owner BEIHANG UNIV
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