超磁致伸缩微致动器车削系统的动力学分析

考虑温度及预应力的影响,建立了应用于车削加工系统的超磁致伸缩微致动器动力学模型,并讨论了温度及预应力对其振动响应的影响.预应力对磁滞及理想磁化模型的超磁致伸缩微致动器模型输出位移的影响变化趋势相同,都出现"翻转"现象,在激励磁场小幅值范围内,系统的输出位移随着预应力的增加而减小,随着激励幅值的增加而增加;当激励磁场幅值较小时,温度对输出位移的影响较小,但是当激励磁场幅值较大时,输出位移随着温度的升高而明显减小.该结果对如何处理预应力、温度、超磁致伸缩材料的滞回的影响提供了理论依据.

Dynamic Analysis of Giant Magnetostrictive Micro-actuator Used in Turning System

The dynamics model of giant magnetostrictive actuator (GMA) used in turning system was established and the influence of temperature and pre-stress on output was discussed. The displacements of ideal or hysteresis GMA model appear "roll over" phenomenon under pre-stress. In small incentive magnetic field, the output displacement decreases with increasing the pre-stress, but when incentive is big enough, the trend is opposite. Temperature affects little on the output displacement in small incentive magnetic field, while the output displacement is obvious decrease with the rise of temperature in a bigger incentive magnetic. The results provide theoretical basis for how to deal with the influences of pre-stress, temperature, GMM hysteresis.