Discrete sliding mode control method of piezoelectric drive deformable wing

A piezoelectric drive and control method technology, applied in the field of flight control, can solve the problems of increased structural weight failure rate of parts, limited output control force, limited deflection angle of control surface, etc.

Active Publication Date: 2020-07-31
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

The traditional control method mainly relies on the deflection of the control surface at the trailing edge of the wing to suppress flutter. Although the structure of the device is simple, this control method requires multiple energy conversions (mechanical, hydraulic, el

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  • Discrete sliding mode control method of piezoelectric drive deformable wing
  • Discrete sliding mode control method of piezoelectric drive deformable wing
  • Discrete sliding mode control method of piezoelectric drive deformable wing

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Embodiment Construction

[0097] The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0098] A discrete sliding mode control method of a piezoelectrically driven deformed wing of the present invention, comprising: (a) establishing a coupled dynamic model for piezoelectric suppression of wing flutter; (b) applying the coupled dynamic model according to discrete control and sliding mode control, the discrete sliding mode control law of piezo-driven deformed wing is obtained; figure 1 It is a flow chart of ...

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Abstract

The invention relates to a discrete sliding mode control method of a piezoelectric drive deformation wing. The discrete sliding mode control method comprises the following steps: (a) establishing a coupling kinetic model of piezoelectric suppression wing flutter according to a Lagrange equation; and (b) according to discrete control, sliding mode control and the coupling dynamic model, obtaining adiscrete sliding mode control law of the piezoelectric drive deformation wing, and if the input voltage is carried out according to the control law, converting the wing into a stable state from a flutter state within limited time. Numerical simulation is carried out on discrete sliding mode control. The method has the most important characteristics that a novel piezoelectric actuator is adopted,the driving strain is better, and meanwhile, the wing surface of the wing can be actively controlled, so that the weight of the wing is reduced, and the reliability of the wing is improved. In addition, a discrete sliding mode controller is designed by adopting a discrete sliding mode control method, and wing bending-torsion coupling flutter is effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of flight control, and relates to a discrete sliding mode control method for a piezoelectrically driven deformed wing, in particular to a discrete sliding mode control method for a piezoelectrically driven deformed wing that is closer to an actual control system and has anti-interference performance method. Background technique [0002] The so-called wing flutter is the phenomenon of self-excited vibration of the wing under the action of the wing and air flow during the flight of the aircraft under the interaction of aerodynamic force, elastic force and inertial force; when the aircraft exceeds a certain critical speed , small disturbances will cause the vibration to diverge, and the amplitude of the wing will increase sharply. The consequences will be very serious, causing damage to the wing or even disintegration of the aircraft, threatening the safety of the aircraft. Wing flutter is one of the main form...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042Y02T90/00
Inventor 袁家信李达杨慧胡志贤
Owner SHANGHAI UNIV OF ENG SCI
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