Title: | Analytical analyses of active control of sound transmission through soft-core sandwich structures and double panel partitions |
Author(s): | Sahu, Kiran Chandra |
Date: | 2016 |
Language: | en |
Pages: | 56 + app. 78 |
Department: | Konetekniikan laitos Department of Mechanical Engineering |
ISBN: | 978-952-60-6690-5 (electronic) 978-952-60-6689-9 (printed) |
Series: | Aalto University publication series DOCTORAL DISSERTATIONS, 41/2016 |
ISSN: | 1799-4942 (electronic) 1799-4934 (printed) 1799-4934 (ISSN-L) |
Supervising professor(s): | Tuhkuri, Jukka, Prof., Aalto University, Department of Mechanical Engineering, Finland |
Thesis advisor(s): | Reddy, J. N., Prof., Texas A & M University, USA and Aalto University, Finland |
Subject: | Acoustics, Civil engineering, Mechanical engineering |
Keywords: | sandwich panel, double panel, soft-core, active control, volume velocity, WSSG, sound transmission loss |
Archive | yes |
|
|
Abstract:Active structural acoustic control (ASAC) is a form of active noise control which focuses on the control of structural vibrations in a manner that minimizes acoustic radiation from a structure. The greatest difficulty ASAC suffers from is in finding an "optimal" error quantity, which can be easily implemented in a control algorithm. Volume velocity control (VVC) metric which is generally used in ASAC typically requires either a large number of sensors distributed across the entire structure, or a single distributed shaped sensor. A new parameter termed "weighted sum of spatial gradients (WSSG)" showed a great potential to significantly reduce noise transmission using four sensors only. This thesis carried out a comprehensive study on VVC and WSSG, and numerical calculations indicate that, by intelligent selection of modal indices for the calculation of WSSG and the frequency band of active control, WSSG is able to achieve comparable amount of sound attenuation with VVC.
|
|
Parts:[Publication 1]: Kiran Chandra Sahu, Jukka Tuhkuri and J. N. Reddy. Active attenuation of sound transmission through a soft-core sandwich panel into an acoustic enclosure using volume velocity cancellation. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 229 (17), 3096-3112, 2015. DOI: 10.1177/0954406215569896 View at Publisher [Publication 2]: Kiran Chandra Sahu, Jukka Tuhkuri and J. N. Reddy. Active structural acoustic control of a soft-core sandwich panel using multiple piezoelectric actuators and Reddy’s higher order theory. Journal of Low Frequency Noise, Vibration and Active Control, 34 (4), 385-412, 2015. DOI: 10.1260/0263-0923.34.4.385 View at Publisher [Publication 3]: Kiran Chandra Sahu, Jukka Tuhkuri and J. N. Reddy. Active piezoelectric-structure acoustic control of a soft-core sandwich panel using volume velocity and a weighted sum of spatial gradient control metric. Accepted for publication in Journal of Vibration and Control, 2015. DOI: 10.1177/1077546315616523 View at Publisher [Publication 4]: Kiran Chandra Sahu and Jukka Tuhkuri. Active control of sound transmission through a double panel partition using volume velocity and a weighted sum of spatial gradient control metrics. Noise Control Engineering Journal, 63 (4), 347-358, 2015. DOI: 10.3397/1/376331 View at Publisher |
|
|
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Page content by: Aalto University Learning Centre | Privacy policy of the service | About this site