26 July 2004 Aeroelastic control using V-stack piezoelectric actuator and Q-parameterized system identification
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Abstract
Aeroelastic control of flutter by means of trailing edge surfaces can be a very effective method, providing that the actuation system is capable of generating suffcient force and displacement over the bandwidth of interest. This effort describes the mechanical design aspects of a flap actuation system using V-stack piezoelectric actuator and Q-parameterization technique for identifying the plant at supercritical speeds. A flap actuation mechanism that takes advantage of the shape of the actuator (V) was designed. In order to validate the actuation concept the actuator was integrated into a NACA 0015 typical section that was tested in the wind tunnel at Duke University. An initial nominal controller was designed to stabilize the typical section for a limited range of speeds above the open-loop flutter boundary. The technique of Q-parameterization was then used to parameterize the unstable system as a function of stable systems, each derived from the nominal controller. Operating in closed loop, flutter was suppressed at the speed it occurred in open loop, and the flutter boundary was extended by more than 50%.
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Emil Valentin Ardelean, Emil Valentin Ardelean, Mark A. McEver, Mark A. McEver, Daniel G. Cole, Daniel G. Cole, Robert L. Clark, Robert L. Clark, } "Aeroelastic control using V-stack piezoelectric actuator and Q-parameterized system identification", Proc. SPIE 5383, Smart Structures and Materials 2004: Modeling, Signal Processing, and Control, (26 July 2004); doi: 10.1117/12.556983; https://doi.org/10.1117/12.556983
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