Active vibration control of trim panel using a hybrid controller to regulate sound transmission |
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Authors: | Insoo Kim and Yeung-Shik Kim |
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Affiliation: | (1) Department of Mechanical Engineering, Kumoh National Institute of Technology, 1, Yangho-dong, Gumi, Gyeongbuk, South Korea, 730-701 |
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Abstract: | This paper presents a method for actively controlling the sound transmission through an aircraft trim panel using a hybrid
feedforward/feedback control technique. The method involves measuring the frequency transfer function of the trim panel system
and then creating an autoregressive moving average model using frequency domain curve fitting. The control technique is designed
to minimize the vibration of a panel that has a limited piston-like motion. The hybrid controller consists of an adaptive
feedforward controller that operates in conjunction with a linear quadratic Gaussian feedback controller. The feedback controller
increases the damping capacity of the secondary plant to augment the convergence rate of the adaptive feedforward controller.
Experimental results indicate that the hybrid controller effectively reduces the vibration of active trim panels and therefore
also reduces the sound transmission of the panel. |
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Keywords: | Active trim panel Sound transmission Hybrid controller Filtered-x LMS Linear quadratic Gaussian Adaptive control |
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