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Closed-loop flutter control using strain actuation

Published online by Cambridge University Press:  03 February 2016

S. B. Kandagal  and
K. Venkatraman
S. B. Kandagal
Affiliation:
Aeroservoelasticity Laboratory, Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India
K. Venkatraman
Affiliation:
Aeroservoelasticity Laboratory, Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India
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Abstract

The present work investigates feedback control of flutter using piezoceramic strain actuators. A two degree-of-freedom oscillating airfoil model with the air loads simulated assuming unsteady aerodynamics is considered. Various feedback measurement combinations for SISO feedback control and strain actuation in the heave and pitch direction are studied to quantify their effect on flutter. The effect of sensor placement on the airfoil, for combined pitch and heave measurement feedback, is also studied. The results show that for a given aeroelastic system, sensor location is an important parameter in realizing an increase in the flutter speed. It is demonstrated that the flutter speed can be increased by more than 50% through strain actuation in the pitch direction.

Type
Research Article
Information
The Aeronautical Journal , Volume 108 , Issue 1083 , May 2004 , pp. 271 - 275
Copyright
Copyright © Royal Aeronautical Society 2004 

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