CAJ | 학술논문

稀土超磁致伸缩材料（GMM）具有磁滞非线性，严重影响超磁致伸缩致动器（GMA）的控制精度。为探讨轴向磁场分布对GMA磁滞特性的影响，确定了通过改变驱动线圈形状的方法来获得GMA不同的轴向磁场分布。基于材料自由能磁滞模型，建立了GMA磁滞非线性耦合模型，并给出了GMA磁滞回线计算方法。分析了四种典型形状的驱动线圈所对应的GMA的磁滞特性，结果表明轴向磁场分布对GMA磁滞特性具有重要影响，其中阶梯型和凹型线圈对应的GMA的最大磁滞较小。
희토초자치신축재료（GMM）구유자체비선성，엄중영향초자치신축치동기（GMA）적공제정도。위탐토축향자장분포대GMA자체특성적영향，학정료통과개변구동선권형상적방법래획득GMA불동적축향자장분포。기우재료자유능자체모형，건립료GMA자체비선성우합모형，병급출료GMA자체회선계산방법。분석료사충전형형상적구동선권소대응적GMA적자체특성，결과표명축향자장분포대GMA자체특성구유중요영향，기중계제형화요형선권대응적GMA적최대자체교소。
Rare-earth giant magnetostrictive material (GMM) has hysteresis characteristics, which results in a decrease in controlling precision of giant magnetostrictive actuator (GMA). In order to study the influence of axial magnetic distribution on hysteresis characteristics of GMA, four typical kinds of shape of drive coil were designed. Based on free energy model of GMM, hysteresis model of GMA was established and its solution flow was presented. The hysteresis characteristics of GMA corresponding to the four typical classes of shape of drive coil were respectively analyzed. Analysis results shows that axial magnetic distribution has important influence on hysteresis characteristics of GMA, and the GMA with step coil or concave coil exhbits smaller hysteresis characteristics.