Driving Magnetic Path Modeling and Numerical Analyses in Giant Magnetostrictive Pump

Abstract

Abstract:

A novel structure of the GMP for the hybrid solid fluid actuator was designed herein. The magnetic circuit was modeled and then the numerical simulation of driving magnetic field distribution of the GMP was performed by FEM. The results of flux density in the giant magnetostrictive by emulating are similar to the results of theoretical calculation when they were compared with each other. The magnetic field uniformity of giant magnetostrictive rod was analysed by the FEM, and the results show that uniformity of radial magnetic field are higher than that of axial magnetic field. The influences of the size of giant magnetostrictive rod on the uniformity of axial magnetic field was also analysed. The roll-off in the driving flux density is observed by dynamic numerical simulation, and the validity of simulation results was validated by comparing the simulation results with the experimental ones.

Key words: giant magnetostrictive pump(GMP), finte element method(FEM), flux density, uniformity, roll-off

摘要：

提出了一种面向固液混合作动器的新型超磁致伸缩泵结构。对超磁致伸缩泵驱动磁路进行了数学建模，采用有限元法对其磁场分布进行了数值模拟，并与理论计算结果进行对比，发现超磁致伸缩棒上磁感应强度的理论计算值与仿真结果基本吻合。采用磁场有限元法分析了超磁致伸缩棒的轴向磁场与径向磁场均匀性,发现径向磁场均匀性明显高于轴向;针对不同长度的棒进行了轴向磁场均匀性分析,揭示了其影响与作用规律;在此基础上对驱动磁场进行了动态数值模拟，发现在输入电压恒定时超磁致伸缩棒内的磁感应强度随着输入信号频率的提高而衰减，实验与仿真结果的对比验证了仿真的正确性。

关键词: 超磁致伸缩泵, 有限元法, 磁感应强度, 均匀性, 衰减

CLC Number:

TH137

Chen Long, Zhu Yuchuan, Yang Xulei, Xu Hongxiang. Driving Magnetic Path Modeling and Numerical Analyses in Giant Magnetostrictive Pump[J]. China Mechanical Engineering, 2014, 25(6): 718-722.

陈龙, 朱玉川, 杨旭磊, 徐鸿翔. 超磁致伸缩泵驱动磁路建模及数值分析[J]. 中国机械工程, 2014, 25(6): 718-722.

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