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Proceedings Paper

Active vibration control with optimized modified acceleration feedback equipped with adaptive line enhancer
Author(s): S. Nima Mahmoodi; Michael J. Craft; Mehdi Ahmadian
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Paper Abstract

Modified acceleration feedback (MAF) control, an active vibration control method that uses collocated piezoelectric actuator actuators and sensors is improved using an optimal controller. The controller consists of two main parts: 1) Frequency adaptation that uses Adaptive Line Enhancer (ALE), and 2) an optimal controller. Frequency adaptation tracks the frequency of vibrations using ALE. The obtained frequency is then fed to MPPF compensators and the optimal controller. This provides a unique feature for MAF, by extending its domain of capabilities from controlling tonal vibrations to broad band disturbances. The optimal controller consists of a set of optimal gains for wide range of frequencies that is provided, related to the characteristics of the system. Based on the tracked frequency, the optimal control system decides to use which set of gains for the MAF controller. The gains are optimal for the frequencies close to the tracked frequency. The numerical results show that the frequency tracking method that is derived has worked quite well. In addition, the frequency tracking is fast enough to be used in real-time controller. The results also indicate that the MAF can provide significant vibration reduction using the optimal controller.

Paper Details

Date Published: 9 April 2010
PDF: 11 pages
Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 76430Q (9 April 2010); doi: 10.1117/12.847881
Show Author Affiliations
S. Nima Mahmoodi, Virginia Polytechnic Institute and State Univ. (United States)
Michael J. Craft, Virginia Polytechnic Institute and State Univ. (United States)
Mehdi Ahmadian, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 7643:
Active and Passive Smart Structures and Integrated Systems 2010
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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