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相关概念视频

Method of Joints: Problem Solving II01:30

Method of Joints: Problem Solving II

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Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
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Net Torque Calculations01:19

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When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
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General Case of Eccentric Axial Loading01:12

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Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
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Work and Energy for Variable Forces01:10

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When an object is acted upon by a variable force, the amount of work done and the change in energy of the object can be more complex to calculate compared to when a constant force is applied. Work is the product of force and displacement, while energy is the capacity of a system to do work. When a constant force is applied to an object, the work done can be calculated as the product of the force and the distance moved in the direction of the force. However, when a variable force is applied, the...
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Three-Dimensional Force System:Problem Solving01:30

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
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Transmission Shafts: Problem Solving01:09

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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.
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相关实验视频

Updated: Sep 16, 2025

Experimental Methods to Study Human Postural Control
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设定特定人群的关节扭矩辅助要求的新方法,适用于外骨架设计.

Stijn Hamelryckx, Christopher van Vlerken, Louis Flynn

    IEEE ... International Conference on Rehabilitation Robotics : [proceedings]
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    概括
    此摘要是机器生成的。

    本研究引入了一种使用最大自发收缩 (MVC) 来确定可穿戴机器人设备辅助需求的新方法. 它确定了20-25%的扭矩缺陷,这对于设计老年人有效的辅助外骨架至关重要.

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    相关实验视频

    Last Updated: Sep 16, 2025

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    科学领域:

    • 生物力学 生物力学
    • 机器人技术 机器人技术 机器人技术
    • 辅助技术 辅助技术 辅助技术

    背景情况:

    • 可穿戴机器人设备需要准确的辅助计算才能有效.
    • 现有的方法往往侧重于特定任务的动力学和动力学,而不是人口层面的能力.
    • 老年人经常经历身体缺陷,需要量身定制的辅助解决方案.

    研究的目的:

    • 介绍一种用于计算可穿戴机器人设备的辅助要求的新方法.
    • 为了确定人口层面的设计辅助技术的物理能力缺陷.
    • 为了证明该方法对老年人下肢关节的应用.

    主要方法:

    • 使用最大自发收缩 (MVC) 测量.
    • 通过将目标人口与参考人口进行比较,计算人口层面的援助需求.
    • 确定扭矩缺陷 (20-25%) 设置辅助扭矩要求,不同于提供100%的峰值扭矩.

    主要成果:

    • 拟议的方法量化了基于人口身体能力的援助需求,而不仅仅是任务的具体情况.
    • 在被研究的人群和关节中,确定了20-25%的一致扭矩缺陷.
    • 扭矩缺陷呈现为关节速度和角度的函数,使得定制的执行器设计成为可能.

    结论:

    • 基于MVC的新方法提供了一个更准确的方法来计算可穿戴机器人的辅助.
    • 解决发现的扭矩缺陷对于辅助设备的有效设计至关重要,特别是对于老年人.
    • 取决于速度和角度的扭矩缺陷允许在未来的可穿戴辅助设备中优化执行器和变速器的设计.