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LQG/GA DESIGN OF ACTIVE NOISE CONTROLLERS FOR A COLLOCATED ACOUSTIC DUCT SYSTEM

โœ Scribed by JONG-YIH LIN; HORNG-YIH SHEU; SHIH-CHENG CHAO

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
248 KB
Volume
228
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

Active noise control of an acoustic duct system is studied by a real state-space model in this paper. The linear quadratic Gaussian (LQG) method is chosen to design an active noise controller in order to reject noise in a collocated duct system subject to a disturbance source at one end. Robustness property of the designed controller with respect to the uncertainty of a complex-valued acoustic impedance at the other end is validated through computer simulations. A nominal real-valued acoustic impedance is therefore used to design reduced order controllers. The design parameters of the LQG method are automatically adjusted by using a simple genetic algorithm (SGA) to achieve a better global control e!ect. This adjustment is guided by a "tness function of SGA speci"ed by a control objective. Results from computer simulation demonstrate the global e!ectiveness of the active noise controllers. Results of experiments also support the feasibility of the proposed design method.

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