A Dimensionality Reduction Monitoring Method for Random Multidimensional Vibration of Aircraft Model

Abstract

The invention relates to a dimensionality reduction monitoring method for random multidimensional vibration of an aircraft model, belonging to the field of aircraft wind tunnel model vibration monitoring, and relates to a dimensionality reduction monitoring method for multidimensional vibration applied to wind tunnel tests of strut and tail brace type aircraft models. In this monitoring method, the multi-dimensional vibration of the aircraft model is decoupled in the pitch plane and the yaw plane. Through the acceleration sensor installed in the multi-dimensional vibration monitoring system, the dimension reduction is expressed as the inertial observation force on two mutually perpendicular planes. The vibration characteristics of the selected random vibration are observed by reducing the dimensionality of the yaw plane, and the random multi-dimensional vibration monitoring of the aircraft model is realized. The monitoring method proposed by the invention improves the measurement accuracy, and the observation method has high feasibility and strong adaptability, and can be applied to rapidly developing aircraft wind tunnel simulation tests.

Description

technical field [0001] The invention belongs to the field of aircraft wind tunnel model vibration monitoring, and relates to a dimensionality reduction monitoring method for multi-dimensional vibration applied to the wind tunnel test of a strut tail support type aircraft model. Background technique [0002] The wind tunnel test is mainly used to simulate the complex flight state of the aircraft. It provides data support for the evaluation of the aerodynamic performance of the aircraft and the design of its system and structure, etc., and plays an indispensable role in the development and innovation of aerospace vehicles. . In the transonic wind tunnel, the aircraft model is fixed by the wind tunnel balance at the front end and the tail support cantilever strut at the tail end, and is installed on the angle of attack adjustment mechanism. Under the influence of unstable airflow disturbance, the aircraft model will produce serious random multi-dimensional vibrations in the mo...

AI Technical Summary

Problems solved by technology

The previous monitoring methods are often intercepted observations of multi-dimensional vibrations, which cannot realize full-dimensional real-time monitoring of vibrations, and the dynamic characteristics and measurement accuracy are poor, which seriously affects the suppression effect of random multi-dimensional vibrations of subsequent aircraft.

Images