Removable Vibration Exciter Mounting for Aircraft Wing Flutter Testing
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Solution Overview
Problem
Existing vibration excitation systems for aircraft wings face challenges in efficiently transmitting vibrations for flutter resistance testing and are difficult to mount and remove, particularly at hard-to-reach locations, which can hinder other tests and lead to inadequate evaluation of vibration resistance.
Innovation Solution
A vibration excitation system with a removably mounted vibration exciter using a fixing structure that transmits vibrations as a shearing force to the front and rear spars of the wing, allowing easy installation and removal, and can be shared with other test devices, optimizing vibration transmission and test flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vibration exciter is mounted directly on the wing, then the vibration transmission efficiency is improved, but the ease of mounting and removal deteriorates
Solution Approach 1:
The system is divided into two separate components: a fixing structure that remains mounted on the wing and a vibration exciter that can be easily attached and removed. This segmentation allows the fixing structure to provide stable vibration transmission to the wing while enabling easy mounting and removal of the vibration exciter without requiring direct attachment to the wing itself.
2Reliability
If the vibration exciter is left mounted on the wing, then the vibration transmission efficiency is maintained, but the adaptability to other tests deteriorates
Solution Approach 1:
The mounting configuration is made dynamic and adjustable. The vibration exciter can be mounted on the fixing structure when vibration testing is needed, and removed when other tests are required. This dynamic configuration allows the system to adapt to different test requirements while maintaining vibration transmission efficiency when needed.
Solution Approach 2:
The fixing structure serves multiple functions: it provides a stable mounting platform for the vibration exciter during vibration tests, and can be left in place to support other testing equipment or configurations for different types of tests. This multi-functionality increases adaptability to various test requirements.
3Reliability
If the vibration exciter is mounted at hard-to-reach locations on the wing, then the vibration transmission efficiency is improved, but the ease of operation deteriorates
Solution Approach 1:
The fixing structure acts as an intermediary component that bridges the gap between the easily accessible vibration exciter and the hard-to-reach location on the wing where optimal vibration transmission is needed. The fixing structure remains mounted at the difficult-to-access location, providing stable vibration transmission, while the vibration exciter itself can be easily attached and removed from more accessible positions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system efficiently transmits vibrations to the wing, reducing the burden of installation and removal, and allows for convenient sharing with other devices, enhancing the evaluation of flutter resistance and accommodating various test modes without interfering with other tests.
Implementation Method 1
the fixing structure transmit the vibration of the vibration exciter as a shearing force to a front spar and a rear spar of one or both of the main wing and the tail
Data Source
AI summary
The present invention provides a vibration excitation system which allows a vibration exciter to be easily mounted on/removed from a wing. The present invention is a vibration excitation system for an aircraft which imparts vibration to a main wing of an aircraft subjected to a test flight, for evaluation of vibration resistance to flutter. A vibration exciter which generates vibration is removably mounted on the main wing through a fixing structure. It is preferable that the fixing structure transmit the vibration of the vibration exciter as a shearing force to a front spar and a rear spar of the main wing.