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现有的惯性冲击式(IDM)驱动器几乎都以堆叠式或双晶片式压电材料为驱动元件。压电式IDM具有诸多优势的同时,也存在有缆驱动、移动速度小、负载能力弱的不足。针对这一问题,提出采用Terfenol-D复合悬臂梁为驱动源,构出一种新型的惯性冲击无缆驱动器,可克服供电电缆的自重和振动对驱动器的精度产生的影响,结合有限元分析软件COMSOL Multiphysics对驱动器进行磁场分析和磁机耦合分析,并通过样机制作与实验测试,得出了驱动器的工作频率在5~45 Hz,工作电流在0~5 A,驱动器的最小步距380 nm。实验结果表明该驱动器在低频条件下,可满足稳定输出较大位移并精确可控的要求,为实现无缆驱动提供了一种新手段。
Almost all existing inertia impulse (IDM) drives are driven by either stacked or dual-wafer piezoelectric materials. Piezoelectric IDM has many advantages at the same time, there are also cable drive, moving speed is small, weak load capacity. In response to this problem, a new type of inertial impactless cable driver is proposed using Terfenol-D composite cantilever as drive source, which can overcome the influence of deadweight and vibration of the power supply cable on the accuracy of the driver. Combined with the finite element analysis software COMSOL Multiphysics analyzes the magnetic field of the actuator and the analysis of the magnetic-mechanical coupling. Through the prototype and experimental tests, the working frequency of the actuator is 5 ~ 45 Hz, the operating current is 0 ~ 5 A and the minimum step of the driver is 380 nm. The experimental results show that the driver can meet the requirement of stable and stable output and controllable accurately at low frequency, which provides a new way to realize the cableless driving.