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A Strategy for Vision-Based Controlled Pushing of Microparticles

机译:基于视觉的微粒控制推送策略

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In this paper, a strategy for controlled pushing is presented for microassembly of 4.5 mum polystyrene particles on a flat glass substrate using an atomic force microscope probe tip. Real-time vision based feedback from a CCD camera mounted to a high resolution optical microscope is used to track particle positions relative to the tip and target position. Tip-particle system is modeled in 2D as a nonholonomic differential drive robot. Effectiveness of the controller is demonstrated through experiments performed using a single goal position as well as linking a series of target positions to form a single complex trajectory. Cell decomposition and wavefront expansion algorithms are implemented to autonomously locate a navigable path to a specified target position. Control strategy alleviates problem of slipping and spinning during pushing.
机译:在本文中,使用原子力显微镜探针尖端在扁平玻璃基板上为4.5毫米聚苯乙烯颗粒提供了一种受控推动的策略。从安装到高分辨率光学显微镜的CCD摄像机的实时视觉反馈用于跟踪相对于尖端和目标位置的粒子位置。尖端粒子系统以2D为模型为非完整的差动驱动机器人。通过使用单个目标位置执行的实验来证明控制器的有效性以及连接一系列目标位置以形成单个复杂的轨迹。实现细胞分解和波前扩展算法以自主地定位到指定目标位置的可通航路径。控制策略减轻了推动过程中滑倒和旋转的问题。

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