ENVELOPE FUNCTION - A TOOL FOR ANALYZING FLUTTER DATA

被引：43

作者：

COOPER, JE

EMMETT, PR

WRIGHT, JR

SCHOFIELD, MJ

机构：

[1] University of Manchester, Department of Engineering, Manchester, M13 9PL, Oxford Rd

[2] British Aerospace (Commerical Aircraft) Ltd., Aerodynamics Department, Airlines Division, Hatfield, AL10 9TL, Comet Way

来源：

JOURNAL OF AIRCRAFT | 1993年 / 30卷 / 05期

关键词：

Aerodynamics - Aircraft - Flight dynamics - Models - Simulation;

D O I：

10.2514/3.46412

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

In this article a new tool for flutter clearance is presented and a preliminary assessment of its capabilities undertaken. It is intended to be complementary to other approaches. The method is based on quantifying the change in the shape of the decay envelope associated with control pulse responses or impulse response functions. An indication of overall stability is obtained without curve fitting by way of a shape parameter which quickly shows whether there has been any significant change since the last test point. In addition, the envelope functions can be overlayed from different speeds. The method is illustrated with data from a simulated aeroelastic model of a multiengined transport aircraft, and the effects of turbulence are considered. Finally, the method is successfully applied to real flight test data.

引用

页码：785 / 790

页数：6

共 6 条

[1]

Sandford M.C., Abel I., Gray D.L., Development and Demonstration of a Flutter Suppression System Using Active Controls, (1975)

[2]

Doggett R.V., Some Observations on the Houbolt-Rainey and Peak-Hold Methods of Flutter Onset Prediction, (1990)

[3]

Thrane N., The Hilbert Transform, (1984)

[4]

Agneni A., Balis Crema L., Damping Measurements from Truncated Signals via Hilbert Transforms, Mechanical Systems and Signal Processing, 3, pp. 1-13, (1989)

[5]

Mohammed K.S., Tomlinson G.R., A Simple Method of Accurately Determining the Apparent Damping in Non-Linear Structures, Proceedings of the 7Th International Modal Analysis Conference, pp. 1336-1346, (1989)

[6]

Cooper J.E., Wright J.R., Application of Time Domain Decomposition Techniques to Aircraft Ground Vibration and Flutter Test Data, European Forum on Aeroelasticity and Structural Dynamics, pp. 235-243, (1989)

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