The Research And Analysis Of High Frequency Vibration Performance Of Giant Magnetostrictive Actuator

Giant magnetostrictive material is a new type of functional materials. In thehigh-frequency driving magnetic field, the resonant output of the strain value willraise up to4000ppm, much higher than1500ppm which is under ordinaryfrequency domain drive. Nonlinear characteristics of giant magnetostrictive materialmakes it difficult when exploring the high-frequency vibration characteristics GMAand calculating the input and output of GMA in high-frequency vibration,as well asseverely restricts the depth and breadth of the high-frequency vibration conditionsGMA in practical engineering applications. In this article, we look aself-developed designs for GMA output frequency vibration as the research object,around the high-frequency vibration characteristics of the device completed thefollowing studies:(1) Based on mechanism of actiongiant magnetostrictive actuator vibration,analysis the differences between quasi-static device driver GMA, given the highfrequency GMA special factors to be considered in the design, as a basis for thecompletion of the overall design of the high-frequency devices GMA, includingdesign and uniformity analysis of GMA driver driving dynamic and static magneticfield, optimization and design of bias magnetic field, pre-pressure mechanism,temperature control system design;(2)Established an improved J-A hysteresis model which takes time-varying loadand dynamic micro spring preload stress into consideration according to thedynamic characteristics of GMA dynamic magnetic machine vibrationstate.Established a strong coupling model which is used to describe the giantmagnetostrictive material–mechanical based on linear magnetic pressure equation.Enriched the mathematical model and the dynamic magnetization coupling model ofgiant magnetostrictive material. Describe the realization of ultra-magnetostrictiveactuator magnet-mechanical coupling hysteresis mathematical modeling ofnonlinear dynamics combined with the structural dynamic model of the actuatordevice;(3)Established a super-magnetostrictive actuator coupled finite element model based on electromagnetic theory match. Explored coupled vibration characteristicsof super-magnetostrictive actuator,completed analysis and preferred of GMM rodsliced layers for modal,completed modal analysis of mass GMA impact of thevibration system，analysed influence of the transient response characteristics ofGMA caused by pulse width and mass,studied the effects of the outputcharacteristics of GMA caused by driving frequency in transient analysis on theANSYS platform. According to the simulation results provide a theoretical basis forthe device operating status preferred.(4) Introduced the hardware and software components of quasi-static anddynamic test platform experimental platform we established.According tothis,explored the effects of GMA output displacement caused by prestressed anddriving magnetic field which laid a great foundation of the device’s preference in thequasi-static experiment; In the dynamic experiments, carried orthogonalexperiment,gives a comprehensive consideration of the effects of dynamic outputcharacteristics caused by driving voltage, drive current, and driveg frequency,andgives a reasonable explanation for the experimental results.