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One-Degree-of-Freedom System01:24

One-Degree-of-Freedom System

761
In mechanical engineering, one-degree-of-freedom systems form the basis of a wide range of electrical and mechanical components. Using these models, engineers can predict the behavior of various parts in a larger system, which gives them insight into how different forces interact with each other.
A one-degree-of-freedom system is defined by an independent variable that determines its state and behavior. One example of a one-degree-of-freedom system is a simple harmonic oscillator, such as a...
761
Support Reactions in Three Dimensions01:27

Support Reactions in Three Dimensions

1.6K
Support reactions in three dimensions help maintain the stability and equilibrium of various structures and systems. These reactions prevent the system from translating and rotating, ensuring the design can withstand external forces and perform its intended function efficiently and safely. Some of the supports providing support reactions in three dimensions are discussed below:
Ball and Socket Joint is one of the supports allowing free rotation about any axis. This freedom of rotation is...
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Machines: Problem Solving II01:30

Machines: Problem Solving II

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Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
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Three-Dimensional Force System01:30

Three-Dimensional Force System

2.8K
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...
2.8K
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

700
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
700
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

1.3K
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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相关实验视频

Updated: Jan 7, 2026

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound
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Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound

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UR16e 6度自由机器人操纵器的扩展动态模型

John Kern1, Luis Donoso1, Claudio Urrea1

  • 1Electrical Engineering Department, Faculty of Engineering, University of Santiago of Chile, Las Sophoras 165, Estación Central, Santiago 9170020, Chile.

Sensors (Basel, Switzerland)
|December 31, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了UR16e工业机器人的扩展分析动态模型 (EADM),包括执行器和摩擦动态. 经过验证的模型准确地预测机器人的行为,这对于高级控制应用至关重要.

关键词:
在PD计算的扭矩控制.在Simscape的多人机上.执行器 执行器 执行器扩展分析动态模型扩展分析动态模型多体物理模型多体物理模型非线性系统是非线性系统.

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相关实验视频

Last Updated: Jan 7, 2026

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Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 机械工程 机械工程
  • 控制系统 控制系统

背景情况:

  • 制造商经常为工业机器人提供有限的动态信息.
  • 准确的动态模型对于先进的控制和模拟至关重要.
  • 现有的模型可能无法完全捕捉诸如执行器动力学和摩擦等复杂行为.

研究的目的:

  • 开发和验证UR16e6度自由度 (DoF) 工业机器人的扩展分析动态模型 (EADM).
  • 将执行器动力学和摩擦模型纳入机器人的动态表示.
  • 为开发的动态模型建立一个严格的验证方法.

主要方法:

  • 使用MATLAB/Simscape Multibody中的多体物理模型 (MPM) 作为参考,采用了两阶段的验证过程.
  • 阶段1:将分析动态模型 (ADM) 的逆动态扭矩与MPM进行比较.
  • 第二阶段:根据比例衍生计算扭矩控制 (PD-CTC) 方案与笛卡尔轨迹测试了EADM和MPM,比较了联合扭矩和位置.

主要成果:

  • 在第一个验证阶段,ADM显示了最小的扭矩误差 (10^-17到10^-13Nm).
  • 在第二阶段,EADM证明了边界位置 (≤4×10^-4 rad) 和扭矩误差 (≤0.4 Nm对于1-3,≤0.05 Nm对于4-6关节).
  • 验证方法证实了EADM准确地表示了MPM的动态行为.

结论:

  • 开发的扩展分析动态模型 (EADM) 提供了UR16e工业机器人的精确动态表示.
  • 拟议的两阶段验证方法,包括扭矩水平检查,对于评估机器人动态模型是有效的.
  • EADM适用于需要精确的动态模拟和UR16e机器人的控制的应用.