A model reference approach for implementing active structural acoustic control
Author(s) -
Robert L. Clark,
Chris R. Fuller
Publication year - 1992
Publication title -
the journal of the acoustical society of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.619
H-Index - 187
eISSN - 1520-8524
pISSN - 0001-4966
DOI - 10.1121/1.403945
Subject(s) - computer science , microphone , control theory (sociology) , attenuation , reduction (mathematics) , acoustics , reference model , actuator , controller (irrigation) , a priori and a posteriori , accelerometer , field (mathematics) , sound pressure , control (management) , mathematics , physics , artificial intelligence , agronomy , geometry , software engineering , optics , biology , operating system , philosophy , epistemology , pure mathematics
A model reference active structural acoustic control (ASAC) approach is investigated as a method for replacing microphone error sensors located in the acoustic field with accelerometers located on the structure. The suggested controller is the multi‐input/multi‐output adaptive LMS algorithm. As opposed to driving the response of the sensor located on the structure to zero with the control inputs, the response is driven to some predetermined ‘‘reference’’ value corresponding to a cost function which originally implemented microphones or the supersonic region of the wave‐number transform as error information. In effect, the uncontrolled structure is adaptively modified to behave like the reference structure. Results indicate that the identical optimal control solution can be obtained when implementing the structural sensors, and the required number of sensors must simply equal the number of control actuators. In addition, for the example studied here, significant reduction in far‐field sound radiation can b...
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