Active Vibration Control of Time-Varying Structural Systems with a Logic FxLMS Algorithm
Publication: Journal of Aerospace Engineering
Volume 33, Issue 4
Abstract
The filtered-x least mean square (FxLMS) algorithm has been widely used in active noise and vibration control of time-varying structural systems, where the secondary path is estimated online by injecting an auxiliary signal. However, the continuous injection of an auxiliary signal will increase the residual error. In this paper, a logic unit is proposed to remove such a drawback from the LMS-based control algorithm. The logic unit decides whether to start/stop injecting an auxiliary signal. The start procedure (SAP) and stop procedure (SOP) send out trigger signals of the logic unit. A flexible structure, which has a time-varying concentrated mass, was established to investigate the adaptive control method. Simulation and experiments were conducted to verify the feasibility and effectiveness of the logic unit. The results have proved that the adaptive control method with the logic unit can suppress vibration effectively in the presence of time-varying dynamics.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request. The model, data, and code used in this paper are listed as follows:
1.
numerical model of the time-varying structure,
2.
data of simulation and experiment, and
3.
code of the logic FxLMS algorithm.
Acknowledgments
This work was financially supported by the Nation Natural Science Foundation of China (NSFC) (Grant No. 11672180).
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 4 • July 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Jun 17, 2019
Accepted: Nov 15, 2019
Published online: Mar 25, 2020
Published in print: Jul 1, 2020
Discussion open until: Aug 25, 2020
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