Angle of attack tracking-oriented asymmetric output limited control method for hypersonic aircraft

A technology of hypersonic speed and control method, which is applied in the field of flight control and can solve the problem of high precision tracking error

Inactive Publication Date: 2019-12-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that scramjet requires high tracking error accuracy in the case of angle-of-attack tracking and has stricter requirements in the case of negative angle-of-attack, the present invention proposes an asymmetric output-limited control for hypersonic vehicle oriented to angle-of-attack tracking

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  • Angle of attack tracking-oriented asymmetric output limited control method for hypersonic aircraft
  • Angle of attack tracking-oriented asymmetric output limited control method for hypersonic aircraft
  • Angle of attack tracking-oriented asymmetric output limited control method for hypersonic aircraft

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Embodiment Construction

[0068] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0069] refer to figure 1 , the present invention's asymmetric output-limited control of hypersonic vehicle oriented to angle-of-attack tracking is applied to a class of hypersonic vehicle dynamics model, and is realized through the following steps:

[0070] (a) Consider the dynamic model of the longitudinal channel of the hypersonic vehicle:

[0071]

[0072]

[0073]

[0074]

[0075]

[0076] in, means thrust, means lift, represents resistance, Represents the pitching moment; V represents the velocity, γ represents the track inclination, h represents the altitude, α represents the angle of attack, and q represents the pitch angular velocity. δ e Indicates the deflection angle of the elevator, and Φ indicates the opening degree of the throttle valve. Indicates dynamic pressure, ρ=6.7429×10 -5 represents the air density, Represents...

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Abstract

The invention relates to an angle of attack tracking-oriented asymmetric output limited control method for a hypersonic aircraft. According to the method, an angle of attack is regarded as system output through model transformation; an output limited control law is designed based on an asymmetric barrier Lyapunov function; tracking error asymmetric constraint information is introduced into the control law, and it is guaranteed that error is limited in a preset asymmetric interval. Since the uncertainty of the system is considered, a compound learning neural network is added to controller design so as to estimate an unknown nonlinear function; and a PID controller is designed according to a speed subsystem so as to realize speed tracking.

Description

technical field [0001] The invention relates to an aircraft control method, in particular to an angle-of-attack-oriented tracking-oriented asymmetric output-limited control method for a hypersonic aircraft, which belongs to the field of flight control. Background technique [0002] Hypersonic vehicles have the characteristics of fast flight speed and strong defense penetration capabilities, and can be used for intercontinental rapid transportation in civilian applications, so they have attracted widespread attention from countries all over the world. Air-breathing hypersonic vehicles are mostly powered by scramjet engines, and the normal air intake of scramjet engines has strict requirements on the tracking accuracy of the aircraft's angle of attack, and when the angle of attack is negative, the air intake of the engine will be greatly reduced due to the blockage of the body The thrust will drop, so it is necessary to ensure that the error amplitude of the angle of attack do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04G05B11/42G05D1/08
CPCG05B13/042G05B13/027G05B11/42G05D1/0808
Inventor 许斌郭雨岩梁捷凡永华张栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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