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相关概念视频

Feedback control systems01:26

Feedback control systems

416
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
416
Open and closed-loop control systems01:17

Open and closed-loop control systems

987
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...
987

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相关实验视频

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Engineering Platform and Experimental Protocol for Design and Evaluation of a Neurally-controlled Powered Transfemoral Prosthesis
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有感觉反的机器人腿假肢的极端寻找控制

Ming Pi1

  • 1School of Information and Control Engineering, Southwest University of Science and Technology, Mianyang 621000, China.

Sensors (Basel, Switzerland)
|August 28, 2025
PubMed
概括

这项研究引入了一种使用非侵入性功能电刺激 (nFES) 的新方法,以帮助截肢者感知地面接触力,使假肢能够实时适应不同地形.

科学领域:

  • 生物力学和机器人学
  • 神经假肢
  • 控制系统工程

背景情况:

  • 人类的运动依赖于感知脚与地面的接触力,以适应步行速度和脚的硬.
  • 截肢者缺乏这种自然的感官反, 阻碍假肢适应不同地形.

研究的目的:

  • 开发一种非侵入性的功能电刺激 (nFES) 系统,以提供用于假肢控制的感觉反.
  • 让截肢者能够实时调整假肢的参数以适应不同的行走地形.

主要方法:

  • 使用非侵入性功能电刺激 (nFES) 传递脚与地面接触力信息.
  • 实施极端寻找控制 (ESC) 策略以优化假肢控制参数.
  • 设计了一个成本函数,集成联合跟踪错误和刺激电流变化.

主要成果:

  • 证明了拟议的控制器的稳定性,包括极端寻找动态.
  • 实验结果证实ESC方法有效地根据实时反调整了假肢参数.
  • 这种系统可以在不同的行走地形上对假肢进行自适应控制.

结论:

  • 开发的nFES系统和ESC战略为增强假肢功能提供了有前途的方法.
关键词:
极端寻找控制机器人假肢感官反

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  • 这种方法可以自然调节假肢的行为,模仿人类的运动.
  • 改善感官反和自适应控制可以显著地帮助截肢者在不同的环境中进行导航.