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- W148757282 abstract "This thesis presents a comprehensive study of decentralised feedback control on a smart panelwith electrodynamic proof mass actuators and velocity sensors at their footprints. The aim is toprovide guidance for the design of light, simple, robust and low cost, control units which canbe attached in large numbers to flexible structures in order to control their spatially averagedresponse and sound radiation at low audio-frequencies.The first part of the thesis is focused on the identification of simple and effective singlechannel feedback control laws. In particular the stability properties and control performanceproduced by Proportional, Integral, Derivative, PI, PD, PID feedback control laws are assessedwith reference to two simple problems where a single degrees of freedom system is controlledby an ideal reactive force actuator and by a practical proof mass actuator.Following this introductory study, the implementation of decentralised feedback control on asmart panel with five control units using proof mass electrodynamic actuators is investigatedfor the best two cases of Proportional and PID control. In parallel the practical design of smallscale control units is explored. In particular the scaling of the stability and control performanceproperties of a single control unit that implements proportional control is examined using astability–control formula.The final part of the thesis presents the stability and control performance tests carried out on asingle control unit and on five decentralised control units. For the multiple channel controlcase, the reductions of the spatially averaged vibration measured with a laser vibrometer andthe reduction of the total sound power radiation measured in an anechoic room are presented." @default.
- W148757282 created "2016-06-24" @default.
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- W148757282 date "2007-12-01" @default.
- W148757282 modified "2023-09-27" @default.
- W148757282 title "Active structural acoustic control smart panel with small scale proof mass actuators" @default.
- W148757282 hasPublicationYear "2007" @default.
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