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相关概念视频

Design of Transmission Shafts01:16

Design of Transmission Shafts

293
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...
293
Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

228
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...
228
Design Example: Deciding Thickness of Lubricating Fluid in a Shaft01:23

Design Example: Deciding Thickness of Lubricating Fluid in a Shaft

109
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
109
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

401
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
401

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Updated: Jun 27, 2025

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
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在人机接口中选择旋转元件的适当速度:量化研究

Mu Tong1, Shanguang Chen1, Wenzhe Tang1

  • 1School of Mechanical Engineering, Southeast University, China.

Journal of eye movement research
|May 2, 2024
PubMed
概括
此摘要是机器生成的。

本研究建立了界面设计中旋转图标的速度基准. 复杂的图标在更高的速度更快地出现,用定量数据告知设计工作流程.

关键词:
人机界面 人机界面只是速度的明显差异.运动感知 运动感知感知速度的感知速度.衡量门值的方法

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科学领域:

  • 人与计算机的交互
  • 感知心理学 感知心理学
  • 图形设计 图形设计

背景情况:

  • 旋转是人机界面中的一个动态符号,对于界面和图形设计至关重要.
  • 为了优化用户体验,需要为旋转图标建立客观的速度基准.

研究的目的:

  • 使用可视化系统偏好用于旋转图标来建立界面设计的速度基准.
  • 探索简单和复杂的旋转图标在5-1800度/秒的速度范围内的感知.
  • 为了确定旋转图标的速度 (JNDS) 和感知速度的明显差异.

主要方法:

  • 对12名参与者进行了两项实验.
  • 实验1使用恒定刺激方法测量旋转图标的JNDS.
  • 实验2使用评级尺度方法来评估对速度序列迅速性的主观感知.

主要成果:

  • 只有明显的速度差异 (JNDS) 在14.9-29%之间.
  • 确定了关键的速度类别:低 (<10度/秒),中等 (180度/秒) 和高 (720度/秒).
  • 复杂的图标被认为比简单的图标旋转得更快,在180度/秒以上.

结论:

  • 速度感知受到图标复杂度和旋转速度的影响.
  • 量化方法和计量学可以提升界面设计工作流程.
  • 识别的速度基准为设计旋转接口元件提供了科学基础.