單跨簡支梁豎向振動的磁懸浮半主動控制的研究.pdf

1、南京航空航天大學碩士學位論文單跨簡支梁豎向振動的磁懸浮半主動控制的研究姓名：楊勤申請學位級別：碩士專業(yè)：結(jié)構(gòu)工程指導教師：黃東升20081201單跨簡支梁豎向振動的磁懸浮半主動控制的研究IIABSTRACTThetraditionalmethodofverticalvibrationisolationmicrovibrationcontroltechnologyhasbeenfacedwiththeproblemallthetime.A

2、nirreconcilableconflictemergesthatsufficientverticalstiffnessshouldbeneededtosupptupperstructurewhileitshouldbeeliminatedtoisolatingverticalvibration.Maglevtechniqueprovidesanewapproachtocodinatetheconflict.Fthisreasonth

3、ispaperprovidesasemiactivecontrolmodelbasedonmagiclevitationderivesthegoverningequationofSimpleSupptedBeamresearchtheresponseontheromgroundexcitation.Theresearchisasfollowsinseveralaspects:1Assumingtheunifmdistributionma

4、ssconcentratedonthedleofthebeamthegoverningequationofasemiactivecontrolsystemfbendingvibrationofthebeamisderivedbuildnonlineardynamicmodelofthemagiclevitation2Thestabilityofthesystemisstudied.3RungeKuttafmulaismodifiedto

5、solvethesystemsubjectedtotheromgroundexcitation.Calculatetheresponseontheromgroundexcitation.Researchtheresponseofdifferentsuspendedheightexcitationfrequencyinsimpleharmonicwave.Theresultsindicatethattheinertialpositiono

6、fthesuspensionistheequilibriumpointofthesystemitisLstable.Themagiclevitationcomponentissimilartoasoftspringdevice.Thevibrationfrequencyofsemiactivecontrolsystemislowerthansimplesupptedbeamtheaccelerationresponseisobvious