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Hypersonic flight vehicle angle-of-attack observation method based on nonlinear gain

A hypersonic, aircraft technology, used in the field of control

Inactive Publication Date: 2017-11-21
NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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Problems solved by technology

Of course, due to the complexity of hypersonic motion, the complexity of accurate observation and estimation of its angle of attack is beyond doubt

Method used

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  • Hypersonic flight vehicle angle-of-attack observation method based on nonlinear gain
  • Hypersonic flight vehicle angle-of-attack observation method based on nonlinear gain
  • Hypersonic flight vehicle angle-of-attack observation method based on nonlinear gain

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] The invention discloses a method for observing the angle of attack of hypersonic aircraft based on nonlinear gain. figure 1 As shown, the angle of attack observation system can be constructed by measuring the ballistic inclination angle and the attitude angle rate of the hypersonic vehicle, and a non- Linear variable gain error law, adjust the observed value of the angle of attack, estimate the force and moment of the aircraft through the observed value o...

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Abstract

The invention discloses a hypersonic flight vehicle angle-of-attack observation method based on nonlinear gain. An angle-of-attack observation system is constructed by measuring the trajectory inclination angle of a hypersonic flight vehicle and the attitude angular rate of the flight vehicle. According to the error between the trajectory inclination angle and the trajectory inclination angle estimate and the error between the attitude angular rate and the attitude angular rate estimate, a nonlinear variable-gain error law is constructed to adjust the observed value of the angle of attack. The force and moment of the vehicle are estimated according to the observed value of the angle of attack to provide force and moment information for the observation system, and thus, the actual value of the angle of attack can be accurately estimated according to the observed value of the angle of attack. The method is different from the general vehicle angle-of-attack observation method in that there is no need to measure the height and speed of a flight vehicle and the observation system needs less information. Moreover, because of the variable-gain error adjustment law, the response of angle-of-attack observation is very quick, and the accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of control, and in particular relates to a non-linear gain-based method for observing the angle of attack of a hypersonic aircraft. Background technique [0002] Hypersonic aircraft has the characteristics of fast flight speed and low cost, which can ensure cheap access to space, and can also be used as a global fast transport aircraft and space strike weapon. Its distinctive military value makes it highly valued by countries all over the world. [0003] Research on hypersonic vehicles and advanced engineering is currently one of the major projects that our country is concentrating on and focusing on. Its difficulty and significance are no less than that of the spaceship and moon landing programs. The problem of hypersonic control is also a hot and difficult issue in the field of control at home and abroad in the past ten years. However, the angle of attack of hypersonic aircraft is difficult to measure in e...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 晋玉强雷军委杨莉莉王宏王玲玲于进勇
Owner NAVAL AERONAUTICAL & ASTRONAUTICAL UNIV PLA
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