用旋转壁控流，实现流体中多颗粒无接触精确定位
Contactless Precision Steering of Particles in a Fluid inside a Cube with Rotating Walls
- 基于流体动力学与路径目标的联合损失函数控制旋转壁
- 实验验证双颗粒同时精准运送至预设位置
- 适合生物医学微操作场景，无需直接接触
无接触操控微小物体在生物医学和化学应用中至关重要，如细胞分析、辅助受精和精密化学。现有方法包括光镊、声镊和磁镊，如今又补充了基于流场控制的技术，利用流动诱导运动实现精确灵活操控。但多颗粒在流体中的捕获仍具挑战。本文提出一种新型控制算法，可实现流场中多颗粒的精确引导。系统通过旋转盘生成流动场，驱动颗粒到达指定位置。盘的旋转由基于优化离散损失（ODIL）框架的反馈控制策略决定，该框架将流体动力学方程与路径目标融合为单一损失函数。模拟与物理实验均表明，该方法可同时将两个微珠精准运送到预设位置，推动了生物医学应用中鲁棒性无接触颗粒操控的发展。
原文摘要 · Abstract (English)
Contactless manipulation of small objects is essential for biomedical and chemical applications, such as cell analysis, assisted fertilisation, and precision chemistry. Established methods, including optical, acoustic, and magnetic tweezers, are now complemented by flow control techniques that use flow-induced motion to enable precise and versatile manipulation. However, trapping multiple particles in fluid remains a challenge. This study introduces a novel control algorithm capable of steering multiple particles in flow. The system uses rotating disks to generate flow fields that transport particles to precise locations. Disk rotations are governed by a feedback control policy based on the Optimising a Discrete Loss (ODIL) framework, which combines fluid dynamics equations with path objectives into a single loss function. Our experiments, conducted in both simulations and with the physical device, demonstrate the capability of the approach to transport two beads simultaneously to predefined locations, advancing robust contactless particle manipulation for biomedical applications.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品；中文卡片由大模型生成，请以原文为准。