简介：Thispaperstudiesthecontrollabilityandobservabilitymeasuresofstructuralvi?brationandacousticradiationandproposesameasureofmodalobservabilitybasedonacousticpressureoutputsandmeasuresofcontrollabilityandobservabilityofacousticradiationbycombiningthemeasuresofmodalcontrollabilityandobservabilityofvibrationmodeswithcorrespondingmodalacousticradiationefficiencies.Aplatewithcontrolforceinputsandvibrationalresponseoutputsandacousticpressureoutputsisinvolvedtoshowthemodalcontrollabilityandobservabilitymeasuresofvibrationmodesandmeasuresofcontrollabilityandobservabil?ityofstructuralvibrationandacousticradiation.Observabilitymeasuresbasedonvibrationalresponseoutputsandacousticpressureoutputsarecomparedandtheemphasisisonthemea?suresbasedontheacousticpressureoutputs.Finallytheapplicationandusefulnessofthecontrollabilityandobservabilitymeasurestoactivecontrolofstructuralvibrationandacous?ticradiationareillustratedandcompared.Itshowsthatthecontrollabilityandobservabilitymeasuresprovideusefulguidanceforactivecontroldesignespeciallyinoptimalactuatorandsensorplacement.
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