Dimension reduction monitoring method for random multi-dimensional vibration of aircraft model

Abstract

The invention discloses a dimension reduction monitoring method for random multi-dimensional vibration of an aircraft model, belongs to the field of aircraft wind tunnel model vibration monitoring, and relates to a dimension reduction monitoring method for multi-dimensional vibration applied to a strut tail boom type aircraft model wind tunnel test. According to the dimension reduction monitoringmethod, multi-dimensional vibration of the aircraft model is decoupled in a pitching plane and a yawing plane, dimensionality reduction is expressed as inertia observation forces on two planes perpendicular to each other through utilizing an acceleration sensor arranged on a multi-dimensional vibration monitoring system, vibration characteristics of selected random vibration are observed in the pitching plane and the yawing plane in a dimensionality reduction mode, and random multi-dimensional vibration monitoring of the aircraft model is realized. According to the dimension reduction monitoring method provided by the invention, the measurement accuracy degree is improved, and the observation method is high in feasibility and strong in adaptability, and can be applied to a rapidly developed aircraft wind tunnel simulation test.

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.

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