Resistance rudder low-speed flutter wind tunnel model with flutter suppression device

Abstract

The invention belongs to the technical field of flutter wind tunnel tests, and particularly relates to a resistance rudder low-speed flutter wind tunnel model with a flutter suppression device. The model comprises a main wing surface and a resistance rudder, the resistance rudder is installed on the rear edge of the main wing surface through an installation assembly, and the installation assembly comprises a spring piece, a control surface deflection piece, a pneumatic element, a brake pin and a guide rail. The resistance rudder low-speed flutter wind tunnel model with the flutter suppression device has suppression capability when a flutter phenomenon occurs in the model resistance rudder in a wind tunnel test, the weight of related mechanisms is greatly reduced, and the simulation of the model is more accurate. The model has the function of selecting the upper control surface and the lower control surface to simultaneously suppress or only suppress the vibration of the upper control surface or the lower control surface by replacing brake pins in different forms, is suitable for flutter model design with a resistance rudder structure, and verifies flutter characteristics and flutter speed allowance related to a certain type of aircraft resistance rudder in a test.

Description

technical field [0001] The application belongs to the field of flutter wind tunnel test technology, in particular to a low-speed flutter wind tunnel model of a drag rudder with a flutter suppression device. Background technique [0002] Drag rudder is one of the most effective directional control measures for aircraft with tailless flying wing layout. Generally, the split trailing edge drag rudder is the most common, and drag rudder is usually installed near the wingtip. The analysis of flutter characteristics related to drag rudder needs to be verified by wind tunnel test. [0003] Unlike conventional wings, the premise of small attack angle, small deflection angle and small amplitude vibration of the aileron structure, the drag rudder usually has a large deflection angle because it needs to participate in yaw control, which gives the flutter of the drag rudder structure Model design poses difficulties. At the same time, in the wind tunnel test, the flutter model with a d...

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Problems solved by technology

[0003] Unlike conventional wings, the premise of small attack angle, small deflection angle and small amplitude vibration of the aileron structure, the drag rudder usually has a large deflection angle because it needs to participate in yaw control, which gives the flutter of the drag rudder structure Difficulty with model design

At the same time, in the wind tunnel test, the flutter model with a resistance rudder structure generally adopts the method of reducing the wind speed of the wind tunnel to suppress the flutter phenomenon, and the reaction time is relatively long, which is not effective in suppressing sudden flutter.

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