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Proceedings Paper

Narrow and broadband sound reduction in automotive panels
Author(s): Marco Giovanardi; Knut Schmidt; Holger Kunze
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Paper Abstract

The possibility of using active control to reduce the sound radiated from a thin automotive panel between 30 and 250 Hz was explored. A steel panel representing a typical automotive application was selected, and QuickPack piezoceramic actuators were bonded on one side of the panel as a disturbance source, with inputs ranging from single-frequency sine wave to broadband band-limited white noise. A finite element model was created to determine the best sound radiating modes within the frequency band of interest, calculate mode shapes and determine the optimal location and size of the control actuators and sensors. Custom QuickPack devices were selected and bonded based on the results of the FEM. Optimal control laws were determined, using system models based on control and disturbance transfer functions. For narrowband control an inductive shunt was designed, where the kinetic energy generated when the plate moves is dissipated in a resonant RLC electric circuit. Also, both narrowband and broadband multiple input - multiple output (MIMO) control algorithms with two sensor and two actuator channels were designed and implemented on a digital signal processor (DSP). The overall sound radiated from the plate was reduced by 3dB RMS between 30-250Hz, while the peak sound reduction obtained at the target mode was 24dB.

Paper Details

Date Published: 14 June 2001
PDF: 12 pages
Proc. SPIE 4332, Smart Structures and Materials 2001: Industrial and Commercial Applications of Smart Structures Technologies, (14 June 2001); doi: 10.1117/12.429658
Show Author Affiliations
Marco Giovanardi, Active Control eXperts, Inc. (United States)
Knut Schmidt, Volkswagen AG (Germany)
Holger Kunze, Volkswagen AG (Germany)


Published in SPIE Proceedings Vol. 4332:
Smart Structures and Materials 2001: Industrial and Commercial Applications of Smart Structures Technologies
Anna-Maria Rivas McGowan, Editor(s)

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