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相关概念视频

Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

85
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
85
Frequency-Domain Interpretation of PD Control01:24

Frequency-Domain Interpretation of PD Control

95
Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
95

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相关实验视频

Updated: Jun 13, 2025

High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
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在EHD波形中应用脉冲宽度调制控制以优化打印性能.

Dongqiao Bai1, Jin Huang2, Hongxiao Gong3

  • 1State Key Laboratory of Electromechanical Integrated Manufacturing of High-performance Electronic Equipments, Xidian University, Xi'an, 710071, PR China.

Microsystems & nanoengineering
|June 9, 2025
PubMed
概括

脉冲宽度调制 (PWM) 增强了用于先进制造的电液动力学 (EHD) 打印. 这种技术可以提高喷射稳定性,减少滴滴大小,并最大限度地减少高分辨率3D打印应用中的缺陷.

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科学领域:

  • 先进制造先进制造 制造先进制造
  • 材料科学 材料科学 材料科学
  • 流体动力学 流体动力学

背景情况:

  • 电动力学 (EHD) 打印为电子和生物电子提供高分辨率的3D打印.
  • 目前的EHD打印面临的挑战包括波形控制,材料限制,卫星滴和电荷积累.

研究的目的:

  • 调查脉冲宽度调制 (PWM) 作为提高EHD打印性能的一种方法.
  • 分析工作周期和脉冲细分对EHD打印动态和结果的影响.

主要方法:

  • 在EHD印刷中对PWM控制进行系统的实验和基于模拟的调查.
  • 在不同的PWM参数下分析喷射动态,滴滴形成,电荷积累和图案质量.

主要成果:

  • PWM调制显著提高了喷射稳定性和打印精度.
  • 降低了水滴直径的25%,并最大限度地减少了卫星水滴的形成.
  • 有效地减轻了电荷积累,并提高了打印图案的质量.

结论:

  • PWM 控制提供了一个可行的解决方案来增强 EHD 打印能力.
  • 拟议的方法与现有设置兼容,可实现高分辨率,稳定和多功能3D打印.
  • 通过PWM控制的EHD打印对先进的电子和功能设备制造具有重大潜力.