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相关概念视频

Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

543
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
543
Design of Transmission Shafts01:16

Design of Transmission Shafts

817
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
817

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相关实验视频

Updated: Feb 26, 2026

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
06:58

A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study

Published on: November 6, 2015

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评估身体驱动的假肢抓取中的可变传输.

Michael E Abbott, Andrew I W McPherson, Franklin D-K Ho

    IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
    |February 24, 2026
    PubMed
    概括

    身体驱动的上肢假肢中的可变传输减少了用户的精力,并改善了抓取. 然而,传输的突然变化可能会导致过度抓取和破坏脆弱的物体.

    科学领域:

    • 生物医学工程 生物医学工程
    • 康复工程 康复工程 康复工程
    • 人与计算机的交互

    背景情况:

    • 身体驱动的上肢假肢提供触觉反,但由于高用户力和不适而受到低采用.
    • 之前对触觉测试台的研究表明,可变传输可以在模拟设备中减轻这些问题.

    研究的目的:

    • 在可穿戴身体驱动的假肢设备上评估不同传动模式的有效性,包括可变传动.
    • 评估这些传输对用户执行负载,运动输入的影响,并掌握现实任务中的成功.

    主要方法:

    • 在一个由身体驱动的可穿戴假肢设备上测试了五种传动模式 (固定和可变).
    • 参与者用各种物体执行了抓住和举起的任务.
    • 对于每个传输模式来说,测量了执行负载,运动输入和抓取成功.

    主要成果:

    • 可变变速箱显著减少了用户所需的执行负载.
    • 在操作设备所需的运动输入中观察到最小的变化.
    • 传输状态的突然,自主变化增加了过度抓取和破坏脆弱物体的风险.

    结论:

    • 可变传动显示出减少身体驱动假肢的物理需求的希望.

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  • 仔细控制传输状态至关重要,以防止过度抓取并确保与微妙物体的安全互动.