超磁致伸缩振动传感器的模型与实验研究

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1、河北工业大学博士学位论文超磁致伸缩振动传感器的模型与实验研究姓名：翁玲申请学位级别：博士专业：电工理论与新技术指导教师：王博文20080401超磁致伸缩振动传感器的模型与实验研究傅立叶变换进行数字带通滤波，消除了白噪声。5、根据振动传感器的机电变换原理，结合惯性传感器的机械接收原理，建立了超磁致伸缩振动传感器的传递函数模型，该模型可以描述振动传感器的输出电压和输入振动信号的变化关系。进行了振动传感器的时域分析、频域分析和灵敏度分析。基于零极点配置的原理进行了振动传感器的低频特性补偿的仿真研究，为振动传感器的低频特性补偿提供了参数

2、。关键词：超磁致伸缩，振动传感器，磁场强度，磁感应强度，应力，应变，传递函数II河北工业大学博士学位论文MODELANDEXPERIMENTALSTUDYOFGIANTMAGNETOSTRICTIVEVIBRATIONSENSORABSTRACTThegiantmagnetostrictivematerialTerfenol-Dhasareversemagnetostrictiveeffect,andamagnetostrictivevibrationsensorcanbedesignedbasedonthiseffect.Th

3、evibrationsensingtechnology,basedonthereversemagnetostrictiveeffect,possiblydevelopanewvibrationsensortobewidelyusedinvibrationtestingandvibrationcontrol,whichwouldspeedupthedevelopmentinvibrationtestingandcontrolling.Toprovidethegroundworkoftheoptimizingdesignandapp

4、licationofthemagnetostrictivevibrationsensor,themodelandexperimentofthesensorareselectedasthesubjectofdissertationforPh.D.Themainresearchworkisfollowing:1.TherelationshipbetweenstrainandcompressivestressunderdifferentbiasmagneticfieldsofthecoreelementTerfenol-Dinmagn

5、etostricitvevibrationsensorisresearched.TheresultsshowthattherelationshipbetweenthemiscomplexandnonlinearwhenthelongitudinalbiasmagneticfieldactsonTerfenol-D,theYoung’smodulusdependenceofthemagneticfieldsandΔEeffectareacquiredfromtherelationshipbetweenstrainandstress

6、.Thecurveofstrainandstressundervariablebiasmagneticfieldsisexplainedthroughmagneticdomaintheoryandmagneticpermeability.Theexperimentsofthestressandmagneticinductionunderdifferentbiasmagneticfieldsarecarriedout,theresultsshowthatthemagneticinductionismaximalwhenthebia

7、smagneticfieldis5kA/m.2.AmodelofgiantmagnetostrictivetransducerunderACdrivingmagneticfieldsanddynamicstressispresented,basedontheJiles-Athertonmodel,themagneticprincipleandthetransducer’sstructuraldynamicsprinciple.Theoutputdisplacement,outputforceandthesensingvoltag

8、eofthesensingcoilsarecomputedwhenthetransducerisunderbothACdrivingmagneticfieldsanddynamicstress.3.WhenthemagneticfieldisACdrivingf