System and method for flutter ground test of aircraft control surface

Abstract

The invention relates to a system and method for a flutter ground simulation test of an aircraft control surface. The method comprises the steps that random excitation is applied so as to enable a control surface structure (1) to be tested to move; a laser sensor (2) emits X-rays to the control surface structure (1) to be tested, and the local moving speed and the local displacement of the control surface are measured; an aerodynamic force determining device (6) conducts unsteady aerodynamic force calculation according to signals collected by the laser sensor (2), and a loading device (8) is driven to conduct aerodynamic force loading on the control surface structure (1) to be tested. The system and method have the advantages of being simpler, more convenient and easier to do than a conventional air hole test due to the fact that a structure to be test is a real object with proportion of 1:1, maintaining real boundary supporting conditions, being capable of considering dynamic stiffness problem of a steering engine, incapable of bringing additional mass for the system due to the fact that the laser sensor is not in contact with the control surface structure to be tested, greatly simplifying the number and the layout mode of the sensor and shock excitation equipment due to the fact that the aerodynamic force quick calculating system and method are used on the hypothesis of control surface rigidity, and being capable of realizing aerodynamic force calculation in the range of subsonic speed, supersonic velocity and even hypersonic velocity through adjusting an aerodynamic force calculation system and method.

Description

technical field [0001] The invention relates to a flutter ground simulation test system and method for an aircraft rudder surface, which are used for testing the flutter stability of the rudder surface in the field of aircraft structure strength testing. Background technique [0002] The flutter characteristics of aircraft components have always been highly valued by the design department. Flutter is the embodiment of the dynamic strength of the structure. In the early days of aircraft development, because people did not have the concept of dynamic coupling and dynamic strength, many air accidents occurred. Modern aircraft are facing higher challenges in terms of flight speed and flight environment, and the flutter problem has become particularly prominent. [0003] The traditional flutter test is carried out in the wind tunnel. Due to the limitation of the size of the wind tunnel, it is necessary to make a scaled-down model of the test piece. It is difficult to fully maint...

AI Technical Summary

Problems solved by technology

[0005] But for ground simulation testing of flutter, one challenge is to simplify the relevant models and / or calculations to make the test simple and easy

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