Robust intelligent control method for low-altitude flight based on ground effect disturbance compensation
A technology of interference compensation and low-altitude flight, applied in the field of aircraft control, can solve the problems of aerodynamic uncertainty and ground effect interference, and achieve the effect of ensuring the robust anti-interference ability and adaptive performance of the system, and improving the real-time response characteristics.
Active Publication Date: 2022-08-05
NORTHWESTERN POLYTECHNICAL UNIV +1
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[0005] Aiming at the influence of ground effect interference and aerodynamic uncertainty in ultra-low altitude flight of aircraft, the present invention designs a robust intelligent control method for low altitude flight based on ground effect interference compensation
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[0119] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0120] refer to figure 1 , the present invention is a robust intelligent control method for low-altitude flight based on ground effect interference compensation. Specific steps are as follows:
[0121] (a) Consider the aircraft longitudinal channel dynamics model:
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[0127] The described kinematics model consists of five state quantities ...
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The invention relates to a low-altitude flight robust intelligent control method based on ground effect interference compensation, belonging to the field of aircraft control. The method considers the influence of ground effect disturbance on the flight state, and introduces the disturbance into the system state equation. Then, the longitudinal dynamics model of the aircraft is converted into the velocity subsystem and the altitude subsystem, and the dynamic inverse control is designed for the velocity subsystem; the backstepping control is designed for the altitude subsystem, and the disturbance observer is designed for the ground effect disturbance. Compensation, and design a compound learning strategy for unknown aerodynamic uncertainty to approximate it, so as to realize the effective treatment of compound disturbance uncertainty. The invention comprehensively considers the ground effect disturbance and the aerodynamic uncertainty to design the control law, and fully coordinate the adaptive performance and robust performance of the system, which is particularly critical for the realization of ultra-low altitude penetration control.
Description
technical field [0001] The invention relates to an aircraft control method, in particular to a low-altitude flight robust intelligent control method based on ground effect interference compensation, and belongs to the field of aircraft control. Background technique [0002] The ultra-low-altitude flight of the aircraft can effectively avoid enemy signals such as radar, and greatly improve the penetration survivability. However, when flying close to the ground, the air pressure is large, the air resistance increases, and the control sensitivity of the aircraft increases, making it difficult to maintain high-speed flight, and factors such as strong gust environment and atmospheric turbulence increase unknown interference factors, which affect the flight altitude control and reduce combat effectiveness. Therefore, it is of great significance to design an effective control method to offset or compensate for the influence of ground effect interference, which is of great significa...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 许斌王霞孙绍山陶呈纲胡逸雯
Owner NORTHWESTERN POLYTECHNICAL UNIV