1204 超磁歪アクチュエータの省電力駆動 : 内蔵永久磁石の磁界変化を利用した位置制御の検討(アクチュエータとその応用,一般講演)

概要

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In the fundamental configuration of a giant magnetostrictive actuator (GMA), a giant magnetostrictive material (GMM) rod is energized by a coil surrounding it. Continuous electric power supply to the coil is necessary to maintain the expansion of the GMA. However, the electric energy consumption is in proportion to the activation interval of the GMA and becomes larger especially for applications to maintain their expansion in long interval. In our previous research, the GMA drive method which can waste no electric power during GMA expanding was proposed using the magnetization/demagnetization characteristics of interior permanent magnets of the GMA. But the motion control of developed GMA was restricted only in the 2-position control. This paper presents the modified power-saving drive method which can give the function of continuously positioning between the 2 positions to the GMA. Furthermore, the modeling method of the GMM and permanent magnets is applied to determine the control parameters.
一般社団法人日本機械学会の論文
2010-04-18