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相关概念视频

Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

879
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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Two-Dimensional Force System: Problem Solving01:29

Two-Dimensional Force System: Problem Solving

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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
The first step to solving a two-dimensional force system problem is to draw a free-body diagram of the object under consideration. This diagram helps identify all the external forces acting on the object, including their...
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Three-Dimensional Force System01:30

Three-Dimensional Force System

2.3K
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Two-Dimensional Force System01:20

Two-Dimensional Force System

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A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
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Coplanar Forces01:25

Coplanar Forces

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Consider an object upon which multiple forces are acting. If the lines of action of each force lie within the same plane, the system can be considered coplanar. The Cartesian vector form can be used to resolve each force into its respective components. For a coplanar system, the system will be in equilibrium if each component of the resultant force equals zero and the resultant force on the system is zero. If the sum of the forces is not equal to zero, then the object will not be in equilibrium...
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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免费的力量:基于视觉的接触力估计与合规的手.

Yifan Zhu1, Mei Hao1, Xupeng Zhu2

  • 1Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT, USA.

Science robotics
|June 25, 2025
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这项研究引入了一种基于视觉的系统,用于估计使用符合机器人手的接触力. 这种具有成本效益的方法利用了手的变形,为机器人操纵提供了传统力传感器的替代方案.

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 计算机视觉 计算机视觉
  • 机械工程 机械工程

背景情况:

  • 传统的力/扭矩传感器是昂贵的,沉重的,脆弱的.
  • 触觉传感器的范围有限,电路脆弱.
  • 机器人操纵需要精确的力感应.

研究的目的:

  • 开发一个经济高效的,基于视觉的接触力估计器,用于符合机器人手.
  • 为了利用弹性变形进行力预测.
  • 为昂贵和脆弱的传统传感器提供替代品.

主要方法:

  • 利用基于视觉的估计器观察一个符合3D打印标准的机器人手.
  • 使用弹性变形分析来估计力.
  • 将内存集成到估计器中,以解决摩擦和歇斯底里.
  • 使用视觉基础模型来进行强大的指纹细分,以防止分心和闭塞.

主要成果:

  • 在力估计中达到0.2到0.4牛顿的误差范围.
  • 证明了估计器对背景噪声和手指遮的稳定性.
  • 在各种操作任务中使用符合规范的抓器验证了实用性.

结论:

  • 基于视觉的力估计器是传统传感器的可行,具有成本效益的替代方案.
  • 该方法显示了提高机器人操纵能力的前景.
  • 与商业传感器相比,进一步开发可以提高准确性和速度.