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Proceedings Paper

Control of a directly excited structural dynamic model of an F-15 tail section using positive position feedback
Author(s): Ayman A. El-Badawy; Ali H. Nayfeh
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Paper Abstract

We investigated the use of positive position feedback (PPF) to suppress high-amplitude vibrations of a structural dynamic model of a twin-tail assembly of the F-15 fighter when subjected to primary resonance excitations. We developed the nonlinear differential equations of motion and obtained an approximate solution using the method of multiple scales. Then, we conducted bifurcation analyses for the open- and closed-loop response of the system and investigated theoretically the performance of the control strategy. The theoretical findings indicate that the control law leads to an effective vibration suppression and bifurcation control. We conducted experiments to verify the theoretical analysis. We built a digital control system that consists of the SIMULINK modeling software and a dSPACE controller installed in a personal computer, and we used actuators made of piezoelectric ceramic material. The experimental results show that PPF is effective in suppressing the steady-state vibrations.

Paper Details

Date Published: 19 June 2000
PDF: 12 pages
Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); doi: 10.1117/12.388766
Show Author Affiliations
Ayman A. El-Badawy, Virginia Polytechnic Institute and State Univ. (United States)
Ali H. Nayfeh, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 3984:
Smart Structures and Materials 2000: Mathematics and Control in Smart Structures
Vasundara V. Varadan, Editor(s)

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