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Flutter test flight excitation device and method

An excitation device and flutter technology, used in measurement devices, aircraft component testing, aerodynamic tests, etc., can solve problems such as difficult excitation and poor repeatability, and achieve stable amplitude, high repeatability, and improved efficiency. Effect

Pending Publication Date: 2022-04-01
中电科芜湖通用航空产业技术研究院有限公司 +1
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Problems solved by technology

[0004] Based on the problems of the above-mentioned background technology, this application provides a flutter flight test excitation device and method to solve the problems of poor repeatability of the existing excitation methods and difficulty in adequate excitation in each frequency band

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  • Flutter test flight excitation device and method
  • Flutter test flight excitation device and method
  • Flutter test flight excitation device and method

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Embodiment Construction

[0034] The technical solutions of the present application are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0035] A real aircraft is used to conduct flutter flight tests under actual flight conditions. When the aircraft reaches the preset flight state, it maintains a stable level flight, and then artificial excitation is applied to obtain the dynamic response of the aircraft structure for flutter analysis. Traditional artificial incentive methods include the following:

[0036] Pilot pulse excitation, that is, during the level flight of the aircraft, the pilot controls the excitation system t...

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Abstract

The invention discloses a flutter test flight excitation device, and the device comprises a front wing which is in the shape of a circular truncated cone, the front wing is hollow, and the two ends of the front wing are open; a notch is formed in the side surface of the front wing in the generatrix direction, and a first supporting rod is connected between the two side walls of the notch. The first end of the rotating shaft extends into the front wing from the small-diameter end of the front wing, the first end of the rotating shaft is connected with a second supporting rod, and the two ends of the second supporting rod are connected with the inner wall of the front wing respectively; the output end of the driving device is connected with the second end of the rotating shaft, and the driving device is used for driving the rotating shaft to rotate; and the signal acquisition device is used for acquiring the excitation signal. The aerodynamic force is adopted as a source of exciting force, full excitation can be conducted in all frequency bands, the front wings are controlled to rotate at different rotating speeds through the driving device, and repeatability is high.

Description

technical field [0001] The present application relates to the technical field of flutter flight test excitation, in particular to a flutter flight test excitation device and method. Background technique [0002] The flutter phenomenon is a large-scale vibration phenomenon caused by the coupled effect of aerodynamic force, elastic force and inertial force on the aircraft, which often leads to catastrophic consequences. Since the aircraft flutter problem involves multidisciplinary fields such as aerodynamics, structural mechanics, and flight dynamics at the same time, pure theoretical analysis cannot completely eliminate the hidden danger of flutter. During the process, a real aircraft should be used to conduct a flutter flight test under actual flight conditions. [0003] Nowadays, small rocket excitation, inertial excitation and other methods are mostly used for flutter flight tests, which have defects such as poor repeatability and difficulty in fully exciting each frequen...

Claims

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Application Information

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IPC IPC(8): G01M9/00G01M9/08G01M9/06B64F5/60
CPCY02T90/00
Inventor 郑威熊俊吕万韬季凯冷崇富
Owner 中电科芜湖通用航空产业技术研究院有限公司
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