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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:03 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Solid State Physics and Materials Science
Title:
Application of piezoelectric materials for active flutter mitigation
Authors:
Daniela ENCIU(1), Ioan URSU(1), Dragos Daniel ION GUTA(1), George TECUCEANU(1), Aurelian Andrei RADU(2)
*
Affiliation:
1)INCAS – National Institute for Aerospace Research “Elie Carafoli”
Bd. Iuliu Maniu 220, Bucharest, 061126, Romania
2)ISS - Institute of Space Science, Str. Atomistilor 409
077125 Magurele, Ilfov, Romania
E-mail
enciu.daniela@incas.ro
Keywords:
piezoelectric, actuator, flutter, active control, receptance method, wind tunnel
Abstract:
Two piezoelectric stacks are used as a V-shaped actuator for aerospace applications to increase the flutter speed and thus to widen the aircraft flight envelope. Flutter is a self-sustaining unstable strong oscillation of the aerospace structure whose amplitude increases in an unexpected way, leading to catastrophe. Using a piezoelectric actuator, an antiflutter demonstrator was conceived which is itself a wing model with an implemented control law. It was designed, manufactured, and tested in INCAS laboratories. The main advantage of the piezo actuator, the bandwidth (about 30 Hz, versus the measured about 5 Hz flutter frequency), is exploited. The synthesis of the control law is based on a new and powerful method named receptance method of poles assignment whose main advantage is that the control law is obtained based on online measurements rather than on the conventional matrix theory, thus avoiding the difficult operations of mathematical modeling and observer building to estimate the unmeasured state variables.
References:
[1] J. L. Pinkerton, A.-M. R. McGowan, R. W. Moses, R. C. Scott and J. Heeg, “Controlled aeroelastic response and airfoil shaping using adaptive materials and integrated systems”, in SPIE's 1996 Symposium on Smart Structures and Integrated Systems, San Diego, CA, 1996
[2] I. Ursu, D. D. Ion Guta, D. Enciu, A. Toader, M. Dan, C. Donciu and V. Turcan, “Mathematical modeling of a V-stack piezoelectric aileron actuation”, INCAS Bulletin, vol. 8, no. 4, pp. 141-155, 2016
[3] J. E. Mottershead and Y. M. Ram, “Receptance method in active vibration control”, AIAA Journal, vol. 45, no. 3, pp. 562-567, 2007
Acknowledgement:
This work was supported by a grant of the Romanian Ministry of Research and Innovation, CCCDI – UEFISCDI, project number 87PCCDI/2018, project registration code PN-III-P1-1.2-PCCDI-2017-0868, within PNCDI III
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