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中文摘要：
设计了一种磁特性测试系统，研究了两种磁致伸缩材料（Galfenol、Terfenol—D）的磁特性。采用有限元方法对测试系统中的磁路进行了优化设计，优化后材料内部磁感应强度提高了33．4％，同时克服了材料内部磁化方向在局部发生交变的现象。为研究偏置应力对于材料特性的影响，设计了一种偏置应力连续可调的磁特性测试装置，通过实验得到不同偏置应力下两种磁致伸缩材料磁化强度、磁致伸缩应变与外加磁场以及偏置应力之间的关系。通过对比分析发现，两种材料磁特性存在较大的差异。Terfenol—D较Galfenol驱动能力更强，但是其磁滞非线性比Galfenol更加明显。
英文摘要：
A testing system is developed to measure the magnetic properties of the magnetostrictive materials. The magnetic properties of two different magnetostrictive materials （Galfenol, Terfenol-D） are studied. The magnetic circuit of the testing system is optimized with finite element method. Simulation results show that the magnetic induction of the optimized circuit can be increased by 33.4%. Also the filed distribution along the length direction is more uniform.. To study the effects of bias stress on material properties, a magnetic characteristic testing device with continuous adjustable bias stress is developed. The magnetization characteristics of two different magnetostrictive materials （ Galfenol, Terfenol-D） have been studied. The magnetostrictions are measured under different groups of biased stress. Comparison of the two materials shows that Terfenol-D has higher actuation capability. However, the hysteretic nonlinearity of Terfenol-D is severer than Galfenol.
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同项目期刊论文
Modeling of galfenol bending actuator considering nonlinear hysteresis and dynamic real-time control
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