Flight flutter model

Abstract

The invention relates to a flight flutter model, and the model comprises an elastic model, a power system, a flight control system, a taking-off and landing system, and a data collection system. The elastic model, the power system, the flight control system, the taking-off and landing system and the data collection system form a flutter model which can fly in the air. The model simulates the structural dynamic characteristics of an airplane, can accurately reflect the rigid motion characteristics of the airplane, can verify the conventional flutter characteristics, rigid and elastic coupling flutter characteristics and aeroservoelastic stability. The model is high in safety, is wide in application range, and is low in cost.

Description

technical field [0001] The invention belongs to the field of aircraft aeroelasticity test, in particular to a flight flutter model. Background technique [0002] When the aircraft reaches a certain speed, due to the interaction of aerodynamic and structural elastic vibrations, the aircraft will undergo a self-excited vibration called flutter, and the speed at this time is called the critical flutter speed. Most of the flutter can cause catastrophic consequences, such as the destruction of the wings and tail of the aircraft in a short time of seconds, so it is necessary to test the flutter characteristics of the aircraft. The experimental verification technology for flutter characteristics mainly includes wind tunnel test and aircraft flutter test flight, both of which have limitations. The flutter wind tunnel test is carried out in the wind tunnel with a scaled-scale model, mainly to verify the flutter characteristics of the elastic aircraft, which cannot completely simulat...

AI Technical Summary

Problems solved by technology

The flutter wind tunnel test is carried out in the wind tunnel with a scaled-scale model, mainly to verify the flutter characteristics of the elastic aircraft, which cannot completely simulate the free flight state of the real aircraft, and cannot investigate the rigid-elastic coupling flutter characteristics and aeroservoelastic stability The flutter test flight is the most direct verification of the flutter characteristics of the aircraft, but it has to bear a significant risk of possible aircraft crash and death, and during the test flight, it usually does not fly to the critical flutter speed, so the real flutter characteristics cannot be obtained

[0003] When a model is used for aircraft flutter tests, the models are usually divided into two types, one is the static model, which has no power system, control law and other components, and cannot simulate the flight of the aircraft, so it cannot test the rigidity of the aircraft. coupling and other characteristics; the other is the dynamic model, which can control the aircraft, but the dynamic model is usually unable to simulate the mass inertia characteristics of the aircraft in structure, so it is impossible to investigate the aeroelasticity and other characteristics of the aircraft

Images