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Related Concept Videos

Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

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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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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

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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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Simplification of a Force and Couple System: II01:23

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In a three-dimensional system, multiple forces can act on an object. These forces can be combined into a single equivalent force, known as the resultant force. Similarly, the moments generated by these forces can be combined into a single equivalent moment, the resultant couple moment. In certain situations, these two entities may not be mutually perpendicular, meaning they do not have a 90-degree angle between them. This unique condition requires a deeper understanding of the interplay between...
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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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Work and Energy for Variable Forces01:10

Work and Energy for Variable Forces

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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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Related Experiment Video

Updated: Sep 30, 2025

Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound
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A Robotic System to Deliver Multiple Physically Bimanual Tasks via Varying Force Fields.

Mingming Zhang, Chenyang Sun, Yudong Liu

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |March 10, 2022
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    Summary

    This study developed a bilateral robot to simulate daily activities for individuals with physical limb disabilities. The robot effectively renders multiple bimanual tasks, offering a new tool for rehabilitation and coordination training.

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    Area of Science:

    • Robotics
    • Rehabilitation Engineering
    • Human-Computer Interaction

    Background:

    • Physical limb disabilities limit daily activities.
    • Bilateral training improves limb coordination, but robotic simulation for ADLs is limited.
    • Existing robots lack task-specific force field control for diverse bimanual tasks.

    Purpose of the Study:

    • To develop a bilateral robot for simulating general activities of daily living (gADLs).
    • To achieve gADL-consistent workspace using series-configured linear motors.
    • To enable haptic rendering of coupled, uncoupled, and semi-coupled bimanual tasks via force field regulation.

    Main Methods:

    • Designed a bilateral robotic system with series linear motors for workspace consistency.
    • Implemented force field regulation between robotic handles for haptic feedback.
    • Conducted experiments with human users to evaluate task simulation capabilities.

    Main Results:

    • Demonstrated a single robotic system's viability in simulating multiple physically bimanual tasks.
    • Successfully achieved gADL-consistent workspace and haptic rendering.
    • Human user experiments validated the system's effectiveness.

    Conclusions:

    • The developed bilateral robot offers a viable method for simulating diverse bimanual tasks.
    • The system has potential as a coordination training device for rehabilitation.
    • Future research will investigate the clinical efficacy of this robotic system.