scholarly journals Modal sensing of efficient acoustic radiators with polyvinylidene fluoride distributed sensors in active structural acoustic control approaches

1992 ◽  
Vol 91 (6) ◽  
pp. 3321-3329 ◽  
Author(s):  
Robert L. Clark ◽  
Chris R. Fuller
Keyword(s):  
Polyvinylidene Fluoride ◽  
Distributed Sensors ◽  
Acoustic Control ◽  
Structural Acoustic Control

Distributed Sensors for Active Structural Acoustic Control Using Large Hierarchical Control Systems

2003 ◽  
Author(s):  
Mike Kidner ◽  
Marty Johnson ◽  
Brad Batton
Keyword(s):  
Control Systems ◽  
Local Control ◽  
Hierarchical Control ◽  
Two Dimensional ◽  
Distributed Sensors ◽  
Acoustic Control ◽  
Control Units ◽  
Low Pass ◽  
The Time Domain ◽  
Structural Acoustic Control

The active structural acoustic control of sound radiation in large structures, such as launch vehicle payload fairings, can require very complex control systems if the control architecture is centralized. For this reason hierarchical, decentralized, control architectures have been suggested as one method of simplifying the complexity of the system and improving the robustness of the system to failures. In a hierarchical configuration, individual actuators or groups of actuators act on local information and use this information to drive the system locally. Higher level, slower acting, master controllers can then be used to observe the global performance and adapt the behavior of the local control systems. The local control units can use feedforward, feedback or hybrid feedforward/feedback techniques. It has been previously shown that good performance can only be achieved if the non-radiating high order wavenumber components are removed from sensor signals. This paper develops both analytically and experimentally a two dimensional distributed structural sensor designed as a wavenumber filter. Filtering in the wavenumber domain is made more attractive since it does not cause the phase problems associated with filtering in the time domain. A numerical method for combining ring shaped sensors is presented. It is shown that low and band pass sensors can be created with relatively few ring elements. Experimental results using a two dimensional ring sensor (with eight rings) attached to a large plate structure is presented. Results show that by carefully combining the outputs from the sensor rings both low pass two dimensional wavenumber filters can be created.

Experimental synthesis of sound pressure fields for active structural acoustic control testing

2013 ◽  
Vol 25 (7) ◽  
pp. 881-889 ◽  
Author(s):  
Stephan Algermissen ◽  
Sebastian Meyer ◽  
Christina Appel ◽  
Hans P Monner
Keyword(s):  
Sound Pressure ◽  
Pressure Fields ◽  
Acoustic Control ◽  
Structural Acoustic Control

scholarly journals An experimental study implementing model reference active structural acoustic control

1993 ◽  
Vol 93 (6) ◽  
pp. 3258-3264 ◽  
Author(s):  
Robert L. Clark ◽  
Gary P. Gibbs ◽  
Chris R. Fuller
Keyword(s):  
Experimental Study ◽  
Model Reference ◽  
Acoustic Control ◽  
Structural Acoustic Control
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