A State-Space Modeling Approach for Active Structural Acoustic Control

Acoustics Field and Active Structural Acoustic Control Modeling in ANSYS

This article attempts to examine acoustic finite element analysis coupled with structure, and provides the necessary information to apply ANSYS for a wide class of structural acoustics problem. First part of this article describes the acoustic field and hence the uses of acoustic point sources in ANSYS. Results are explained and compared with that of analytical solution. And second part deals w...

Finite Element Modelling Approach in Active Structural Acoustic Control

State space modeling in multichannel active control systems

Active Structural Acoustic Control of Machine Enclosures

Vibrating machinery such as pumps, generators and compressors normally use passive insulation materials to reduce sound radiation. This paper provides a practical examination of possible solutions to active control of machine enclosures that reduces the radiated sound intensity from the enclosure to the environment. The results show that a combination of simple sky-hook type feedback controller...

Active structural acoustic control of impact noise

Industrial machines like punching machines and presses can generate structure-borne impact noise, with noise levels exceeding the tresholds, imposed by legal regulations on noise emission. This paper presents an approach of non-collocated active structural acoustic control of transient noise, produced by a repetitive impact excitation. Although there is a significant difference in nature betwee...