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相关概念视频

Open and closed-loop control systems01:17

Open and closed-loop control systems

Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal and...

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High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
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基于双闭环模糊控制的高稳定性电液动力学喷墨打印.

Yifang Liu1,2, Yiman Chen1, Huangping Yan1

  • 1Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, 361102, China.

Scientific reports
|July 16, 2025
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概括

一种新的模糊控制方法通过使用喷射图像识别和微电流反来提高电气动力学 (EHD) 打印稳定性. 这提高了纤维沉积的均性,并减少了微纳米结构的制造缺陷.

关键词:
电动力学打印方式模糊的控制控制器.喷射图像识别器 喷射图像识别器微电流的测量方法是微电流.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 制造业 工程 制造工程
  • 控制系统 控制系统

背景情况:

  • 电动力学 (EHD) 打印是一种关键的微纳米制造技术.
  • 由于外部干扰,EHD打印面临着不稳定的喷射和不均的沉积等挑战.
  • 实现高分辨率和稳定的微纳米结构制造仍然是一个重大挑战.

研究的目的:

  • 开发和评估一种双闭环模糊控制方法,用于稳定EHD打印.
  • 为了提高EHD印刷中纤维沉积的均性和稳定性.
  • 提高微纳米增材制造的整体质量和效率.

主要方法:

  • 实施双闭环模糊控制系统.
  • 整合喷射图像识别,用于实时监控.
  • 利用微电流测量进行过程反.
  • 应用模糊控制算法来管理EHD打印参数.

主要成果:

  • 纤维沉积均性和稳定性的显著改善.
  • 降低了当前波动率,从34%降至12%.
  • 纤维直径的波动从35微米减少到15微米.
  • 纤维间距挥发率从29%降低到9.5%.
  • 加速喷气模式转换响应时间,将无效沉积时间从5秒缩短到2.2秒.

结论:

  • 开发的闭环模糊控制方法有效优化了EHD打印质量.
  • 这种方法提高了微纳米结构制造的精度和可靠性.
  • 该研究通过改进的反控制来推进高分辨率增材制造应用.