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Showing 1 to 7 of 7 for “"double panel"”.
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Active structural acoustic control of double panel systems including hierarchical control approaches
… structural acoustic control when applied to double panel systems are investigated to determine the respective advantages and limitations of this approach. Included is the application of a novel hierarchical control approach which may reduce the controller complexity and the collinearity issue …
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Smart double panel with decentralised active damping units for the control of sound transmission
… a comprehensive study of a smart aircraft double panel for active vibroacoustic control. The control of the double panel vibration is implemented using Multi-Input-Multi-Output (MIMO) decentralised velocity feedback loops. The loops are applied via an array of electrodynamic force actuators …
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MODELING AND DESIGN OF A SMART DOUBLE-PANEL SYSTEM FOR THE CONTROL OF SOUND TRANSMISSION INTO AIRCRAFT CABIN
… with noise levels in the past because the double-panel design of aircraft sidewall systems has been much optimized. Furthermore, new composite materials are now used in the design of trim panels and additional sound absorption materials are also used in fuselage structures. However, this …
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Heterogeneous (HG) Blankets for Improved Aircraft Interior Noise Reduction
… reduction of the sound transmission through double-panel systems at low frequencies. HG blankets consist of poro-elastic media with small, embedded masses, operating similar to a distributed mass-spring-damper system. Although most traditional poro-elastic materials have failed to effectively …
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Control of Sound Transmission with Active-Passive Tiles
… approach involves the use of lightweight stiff panels, or tiles, attached to a radiating base structure through active-passive soft mounts and covering the structure surface. The resulting double-partition configuration was shown to have good high frequency passive isolation, but poor low …
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Foreign Direct Investment in Sub-Sahara Africa.
… achieve the fourth objective, pooled OLS, fixed (double panel), and the GMM estimator were employed on a sample of selected sectors in South Africa for 5 years (2010-2014). The researcher also utilised data sourced from UNCTAD, ISC088, QLFS, QES and the Department of Statistics South Africa to …
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Development of a Model for Predicting the Transmission of Sonic Booms into Buildings at Low Frequency
… such as plaster-wood walls, floors, and siding panels. The constitutive matrix for these types of components is formulated using simple analytical expressions based on the orthotropic constants of an equivalent orthotropic plate. This approach is computationally efficient since there is no need …