Experiment and Simulation of Micro-part Dynamics with Roughness Effect
Experiment and Simulation of Micro-part Dynamics with Roughness Effect
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具有粗糙度效应的微零件动力学实验与仿真
DOI：
10.1002/tee.21820
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and Shinichi Hirai
中科院分区：
文献类型：
--
作者：
Phuong Hoai Le;Thien Xuan Dinh;Atsushi Mitani;and Shinichi Hirai
在这项研究中，我们进行了一项实验并建立了一个动态模型，该模型描述了微部件在锯齿表面上的平面运动模式，包括两个线性运动和一个旋转运动。在实验中，采用粒子跟踪方法获得了微零件的平面运动。旋转角度从微部件图像的主轴测量。在模拟中，假设微部件与锯齿表面的接触是微部件上的多个半球与表面的接触，这种接触可能是点接触，也可能是坡接触。将锯齿形表面粗糙度对各接触点接触力的影响建模为法向量场。此外，通过在理想的锯齿轮廓上叠加白噪声来近似锯齿表面的粗糙度，并用于评估附着力。结果表明，该模型能较好地描述微零件的运动模式。两种直线运动的模拟结果与前人的实验结果吻合较好。该模型可用于改进微零件输运曲面的设计。
In this study, we perform an experiment and develop a dynamic model that describes the planar motion modes of a micro-part, including two linear motions and one rotational motion, on a saw-tooth surface. In the experiment, the planar motion of the micro-part is obtained by a particle-tracking method. The rotation angle is measured from the principal axis of the micro-part image. In a simulation, contact between the micro-part and the saw-tooth surface is assumed to be the contact between a number of hemispheres on the micropart and the surface, which results in either a point contact or slope contact. The effect of the saw-tooth surface roughness on the contact force at each contact point is modeled as a field of normal vectors. In addition, the roughness of the saw-tooth surface is approximated by superposing white noise on an ideal saw-tooth profile and is used to evaluate the adhesion force. The results show that the model describes the motion modes of a micro-part. Furthermore, the simulated results of the two linear motions are in good agreement with our experimental results from a previous study. The proposed model can be used to improve the design of surfaces for micro-part transport.