Research on two-dimensional external magnetic drive method of maglev ball based on force imbalance.
Research on two-dimensional external magnetic drive method of maglev ball based on force imbalance.
复制标题
基于力不平衡的磁悬浮球二维外磁驱动方法研究
DOI：
10.1063/5.0017776
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Zhibin Ye
中科院分区：
文献类型：
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作者：
Guancheng Liu;Yong;Y. Liu;Zhiyuan Dong;Zhibin Ye
针对磁悬浮球在非液体环境中沿电磁作动器轴向直线运动的要求，首次提出了一种基于力不平衡的磁悬浮球外磁驱动方法。该方法有望在工业和医用微型弯管领域得到更好的应用。磁悬浮球是一种磁悬浮物体。基于插值算法，设计了磁悬浮球的二维步进悬浮运动轨迹作为运动的目标曲线。磁悬浮球可沿指定的运动轨迹进行大范围沿着驱动，与1.0 mm步进输入相比，0.2 mm步进输入在下降段和上升段的超调量分别减小了73.7%和73.6%。因此，通过较小的阶跃控制改善了磁悬浮球的阶跃响应的波动。然而，阶跃输入越大，速度越快，悬浮间隙越大。在1.0 mm阶跃输入条件下，最大悬浮间隙可达20.487 mm，磁悬浮球的速度可达3.086 mm/s。与静态悬浮控制相比，在运动控制条件下，磁悬浮球的位置因径向跳动而波动剧烈，位置精度可达± 0.03mm。
In this paper, an external magnetic driving method of a maglev ball based on force imbalance is first proposed to meet the requirement that the maglev ball is moved linearly in the axis direction of the electromagnetic actuator in the non-liquid environment. This method is expected to be better applied in the fields of industrial and medical miniature curved tube. The maglev ball is a magnetic levitated object. Based on the interpolation algorithm, the two-dimensional stepwise levitation motion trajectory of the maglev ball is designed as the target curve of the motion. The maglev ball can be driven with a large range along a specified motion path. Compared with the 1.0 mm step input, the overshoot of a 0.2 mm step input is decreased by 73.7% and 73.6% in the descending phase and the ascending phase, respectively. Therefore, fluctuation of the step response of the maglev ball is improved by smaller step control. However, the larger the step input, the faster the speed and the larger the levitation gap. Under the condition of a 1.0 mm step input, the maximum levitation gap can be up to 20.487 mm, and the speed of the maglev ball can reach 3.086 mm/s. Compared with static levitation control, the position of the maglev ball is fluctuated severely due to radial runout under motion control conditions, and the position accuracy can reach ±0.03 mm.