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関連する概念動画

Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

277
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
277
Shear and Bending Moment Diagram: Problem Solving01:24

Shear and Bending Moment Diagram: Problem Solving

1.9K
When analyzing a beam supporting concentrated loads and a distributed load, drawing the shear and bending moment diagrams is essential. These diagrams help understand the internal forces and moments acting on the beam, which is crucial for designing safe and efficient structures. Follow these steps to create the shear and bending moment diagrams:
Draw a Free-Body Diagram: Start by drawing a free-body diagram of the entire beam, including the concentrated loads, distributed load, and reaction...
1.9K
Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

392
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
392
Shearing Strain01:20

Shearing Strain

620
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
620
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

853
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...
853
Shearing Stress01:19

Shearing Stress

850
Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
850

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Mechano-Node-Pore Sensing: A Rapid, Label-Free Platform for Multi-Parameter Single-Cell Viscoelastic Measurements
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ローボットによる回転作業の柔らかい切断感知 還元順の導電性モデリング

Dhruv Trehan1, David Hardman1, Fumiya Iida1

  • 1Bio-Inspired Robotics Laboratory, University of Cambridge, Cambridge CB2 1PZ, UK.

Sensors (Basel, Switzerland)
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まとめ
この要約は機械生成です。

研究者らは,スクリュートライバーの回転のようなタスク中にシア力を予測するために,電気阻力トモグラフィ (EIT) を使用した柔らかいロボット指先のための新しいモデルを開発しました. この進歩により ロボットによる操作が より速く より正確に 感知できるようになります

キーワード:
電阻トモグラフィーロボットツールの使用ソフトセンサ

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科学分野:

  • ロボット
  • センサー技術
  • 材料科学

背景:

  • 巧妙なロボット操作は 人工指先からの豊かな触覚フィードバックに依存しています
  • 切断感知は回転や引きずりなどの作業に不可欠ですが,電気阻力トモグラフィ (EIT) を使用したソフトセンサーの研究は限られています.
  • EITの技術は,高度なタクティルのセンサーを開発するための有望な道を提供します.

研究 の 目的:

  • ロボットによる操作のためのEITを用いて柔らかい切断の予測を調査する.
  • EITのセンサーの導電性マップとスクリュートライバーの回転作業を関連付けるための縮小型モデルを開発し分析する.
  • 高速で閉路のロボット制御を 改善した触覚センサーで実現する

主な方法:

  • EITベースのシェアセンシングのための5つの縮小型モデルを提案し,調査した.
  • スクリュードライバーの回転作業で発生したEIT信号を分析した.
  • トークと直径のような物理的な測定値と相関する低次元のモデルパラメータ.

主要な成果:

  • 低次元のパラメータと物理的な測定値の間の高い相関関係 (トルクで0.96,直径で0.97) を達成した.
  • 提案されたモデルを使用して,騒々しいEIT信号から洞察を導き出せることを実証しました.
  • 従来の方法とは異なり,有限要素法 (FEM) モデルの信号を事前計算する可能性を示した.

結論:

  • 開発された縮小型モデルは,EITを使用したロボットの指先で切断ベースの回転を効果的に予測します.
  • このアプローチは リアルタイムで高速な 閉ループのロボット操作システムへの道を開きます
  • この発見は 複雑な操作作業のための ソフトロボティクスと タクティルセンシングの分野を発展させました