Effects of actuator nonlinearity on aeroelastic characteristics of a control fin

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The influences of actuator nonlinearities on actuator dynamics and the aeroelastic characteristics of a control fin were investigated by using iterative V-g methods in subsonic flows; in addition, the doublet-hybrid method (DHM) was used to calculate unsteady aerodynamic forces. The changes of actuator dynamics induced by nonlinearities, such as backlash or freeplay, and the variations of flutter boundaries due to the changes of actuator dynamics were observed. Results show that the aeroelastic characteristics can be significantly dependent on actuator dynamics. Thus, the actuator nonlinearities may play an important role in the nonlinear aeroelastic characteristics of an aeroelastic system. The present results also indicate that it is necessary to seriously consider the influence of actuator dynamics on the flutter characteristics at the design stage of actuators to prevent aeroelastic instabilities of aircraft or missiles. (C) 2007 Elsevier Ltd. All rights reserved.
Publisher
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
Issue Date
2007-10
Language
English
Article Type
Article
Keywords

CONTROL SURFACE; FLUTTER ANALYSIS; STRUCTURAL NONLINEARITIES; BEHAVIOR; AIRCRAFT; SECTION; AIRFOIL; FLOW

Citation

JOURNAL OF FLUIDS AND STRUCTURES, v.23, no.7, pp.1093 - 1105

ISSN
0889-9746
DOI
10.1016/j.jfluidstructs.2007.04.003
URI
http://hdl.handle.net/10203/5568
Appears in Collection
AE-Journal Papers(저널논문)
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