Aircraft control-surface-free flight control method based on synthetic dual-jet flow field control

Abstract

The invention relates to an aircraft control-surface-free flight control method based on synthetic dual-jet flow field control. According to the method, an autonomous and controllable synthetic dual-jet exciter is applied to the field of aircraft flight control, the synthetic dual-jet exciter is arranged at a preset position according to different aircraft layouts, flight states and control requirements, a piezoelectric vibrator repeatedly compresses an expansion cavity under the control of a power supply controller, and the synthetic dual-jet exciter and the piezoelectric vibrator are combined. Periodically-blown and sucked synthetic dual-jet is formed at an outlet, the synthetic dual-jet is utilized to change a streaming flow field of the aircraft and reconstruct surface pressure distribution, and a preset control strategy is adopted to achieve the purpose of controlling the attitude of the aircraft. According to the method, when the aircraft is subjected to flight control, any mechanical structure does not need to be operated, so that the invisibility and the aerodynamic configuration of the aircraft are prevented from being damaged, the mechanical wear is reduced, and the method has extremely high application value; the method is suitable for replacing the conventional control surface of the aircraft, and can also be matched with the conventional control surface at the same time or in a time-sharing manner.

Description

technical field [0001] The present application relates to the technical field of aircraft control, in particular to an aircraft control method based on synthetic dual-jet flow field control without rudder surfaces. Background technique [0002] Most of the current aircraft rely on mechanical structures such as ailerons, elevators, rudders, and mechanical vector nozzles to generate the aerodynamic force / moment required to change the attitude of the aircraft to achieve flight control. However, the flight control method based on the mechanical structure has defects: First, the mechanical structure The actuation system (steering gear, hydraulic system, etc.) needs to occupy a large amount of space and mass distribution of the aircraft, which limits the performance improvement and lightweight design of the aircraft; second, the layout of the mechanical structure often requires the installation of bulges, seams and complex appearances Third, when the mechanical structure generates...

AI Technical Summary

Problems solved by technology

[0002] Most of the current aircraft rely on mechanical structures such as ailerons, elevators, rudders, and mechanical vector nozzles to generate the aerodynamic force / moment required to change the attitude of the aircraft to achieve flight control. However, the flight control method based on the mechanical structure has defects: First, the mechanical structure The actuation system (steering gear, hydraulic system, etc.) needs to occupy a large amount of space and mass distribution of the aircraft, which limits the performance improvement and lightweight design of the aircraft; second, the layout of the mechanical structure often requires the installation of bulges, seams and complex appearances Third, when the mechanical structure generates torque, it often needs to produce a certain displacement (such as the high-frequency vibration of the rudder surface when relaxing the static stability design), which will destroy the carefully designed stealth of the aircraft. The shape has a great impact on the stealth performance of the aircraft, which limits the ability of the aircraft to perform specific tasks; fourth, the mechanical structure is often heavy and complicated, and maintenance is difficult and time-consuming, which increases the cost of the entire life cycle of the aircraft

[0003] Many attempts have been made at home and abroad for jet flight control technology, but most of the current control schemes have the following problems: First, some methods use the engine bleed air as the jet source for flow control, which has a significant impact on the working state of the engine and weakens Second, some methods use their own high-pressure air source to increase the weight of the system and increase the complexity of pipeline layout, and there are hidden worries of air source battery life and pipeline valve leakage; third, some methods use axial flow As a flow control jet source, fan booster needs to design internal pipelines and flow channels, which increases the weight of the system, and the frequency response characteristics are slightly weaker, and there are certain limitations in control efficiency and performance; Fourth, there are methods using synthetic jets As a flow control jet source, there are problems of ballast failure and low energy utilization efficiency, which limit its engineering application

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