Novel Universal Multistable Mechanism Based on Magnetic–Mechanical–Inertial Coupling Effects
Novel Universal Multistable Mechanism Based on Magnetic–Mechanical–Inertial Coupling Effects
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DOI：
10.1109/tie.2013.2273475
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发表时间：
2014-06
影响因子：
7.7
通讯作者：
Jian Zhao;Yu Huang;Renjing Gao;G. Chen;Yintang Yang;Shutian Liu;Kefeng Fan
中科院分区：
文献类型：
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作者：
Jian Zhao;Yu Huang;Renjing Gao;G. Chen;Yintang Yang;Shutian Liu;Kefeng Fan
与包含多个磁致伸缩元件的多稳态机构不同，首次设计并制造了一种新型的具有面内全方位触发能力的通用多稳态机构，该机构主要由一个由弹性杆支撑的磁环和一个固定在铝壳上的轴向磁化柱组成。面内各向同性多稳定性起源于惯性力、弹性力和磁力之间的非线性相互作用。根据伪刚体模型和磁荷模型理论，建立了精确的数学模型，对非线性磁-力-惯性耦合力学进行了精确分析。通过考虑磁环的平移运动和倾斜角度对磁场分布和强度的影响，数值计算和实验得到了非线性力-位移关系。数值计算结果与实验结果吻合较好，验证了各向同性多稳态机构的设计方法。
Different from multistable mechanisms incorporating multiple bistable elements, a novel universal multistable mechanism possessing the capability of being triggered in all in-plane directions was first designed and fabricated by using symmetric 3-D magnetic structures, which mainly consists of one magnetic ring supported by a elastic rod and one axially magnetized pillar fixed on the aluminum case. The in-plane isotropic multistability was originated from the nonlinear interactions among the inertial force, the elastic force, and the magnetic force. According to the pseudo-rigid-body model and magnetic charge model theories, an accurate mathematical model was established for precisely analyzing the nonlinear magnetic-mechanical-inertial coupling mechanics. By considering the influence of the translational motion and the inclination angle of the magnetic ring on the magnetic field distribution and strength, the nonlinear force versus displacement relationship was obtained numerically and experimentally. The numerical results are in good accordance with those obtained by experiments, thus validating the design methodology for isotropic multistable mechanism.