The Impact of Model Uncertainty on Spatial Compensation in Active Structural Acoustic ControlTurbulent boundary layer (TBL) noise is considered a primary factor in the interior noise experienced by passengers aboard commercial airliners. There have been numerous investigations of interior noise control devoted to aircraft panels; however, practical realization is a challenge since the physical boundary conditions are uncertain at best. In most prior studies, pinned or clamped boundary conditions have been assumed; however, realistic panels likely display a range of varying boundary conditions between these two limits. Uncertainty in boundary conditions is a challenge for control system designers, both in terms of the compensator implemented and the location of actuators and sensors required to achieve the desired control. The impact of model uncertainties, uncertain boundary conditions in particular, on the selection of actuator and sensor locations for structural acoustic control are considered herein. Results from this research effort indicate that it is possible to optimize the design of actuator and sensor location and aperture, which minimizes the impact of boundary conditions on the desired structural acoustic control.
Document ID
20040139546
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Cabell, Randolph H. (NASA Langley Research Center Hampton, VA, United States)
Gibbs, Gary P. (NASA Langley Research Center Hampton, VA, United States)
Sprofera, Joseph D. (Duke Univ. Durham, NC, United States)
Clark, Robert L. (Duke Univ. Durham, NC, United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2004
Subject Category
Acoustics
Meeting Information
Meeting: ACTIVE 04: 2004 International Symposiumo n Active Control of Sound and Vibration