Non-linear optimisation problems in active control
Non-linear optimisation problems in active control
The work described in this thesis is concerned with the nonlinear optimisation problems encountered in the application of active sound control. These are mainly to do with the optimal locations of transducers in an active control system; loudspeakers and microphones in the examples presented in this thesis. Two natural algorithms are used to perform this optimisation. Their properties are briefly reviewed and the modifications required to use them in this context are discussed. Measurements and predictions are also described of the acoustic transfer impedance in an enclosure, with or without a Helmholtz resonator attached. Also the performance is studied of active sound control systems under the constraint that the control signal inputs to loudspeakers is limited, and the optimal transducer positions under these circumstances are considered. Finally the algorithms developed and verified in the laboratory enclosure are applied to a set of data measured in a helicopter and used to suggest a practical control system which gives acceptable performance with a minimum number of practically sized loudspeakers and microphones.
University of Southampton
1996
Baek, Hwang-Hyun
(1996)
Non-linear optimisation problems in active control.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The work described in this thesis is concerned with the nonlinear optimisation problems encountered in the application of active sound control. These are mainly to do with the optimal locations of transducers in an active control system; loudspeakers and microphones in the examples presented in this thesis. Two natural algorithms are used to perform this optimisation. Their properties are briefly reviewed and the modifications required to use them in this context are discussed. Measurements and predictions are also described of the acoustic transfer impedance in an enclosure, with or without a Helmholtz resonator attached. Also the performance is studied of active sound control systems under the constraint that the control signal inputs to loudspeakers is limited, and the optimal transducer positions under these circumstances are considered. Finally the algorithms developed and verified in the laboratory enclosure are applied to a set of data measured in a helicopter and used to suggest a practical control system which gives acceptable performance with a minimum number of practically sized loudspeakers and microphones.
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Published date: 1996
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Local EPrints ID: 459540
URI: http://eprints.soton.ac.uk/id/eprint/459540
PURE UUID: b034c47b-b398-4e82-a3fe-3934dd636460
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Date deposited: 04 Jul 2022 17:13
Last modified: 04 Jul 2022 17:13
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Author:
Hwang-Hyun Baek
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