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Related Concept Videos

Three-Dimensional Force System01:30

Three-Dimensional Force System

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...
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

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.
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Kinematic Equations - III01:18

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The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
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Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

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Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
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Kinematic Equations - II01:17

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Suppose a car merges into freeway traffic on a 200 m long ramp. If its initial velocity is 10 m/s and it accelerates at 2 m/s2, then the...

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Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
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Three dimensional visualization of the statically equivalent serial chain from kinect recording.

Alejandro González1, Mitsuhiro Hayashibe, Philippe Fraisse

  • 1INRIA DEMAR Project and LIRMM, CNRS/University of Montpellier, France. gonzalezde@lirmm.fr

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|February 1, 2013
PubMed
Summary

This study introduces a portable tool for real-time human center of mass (CoM) estimation using the Statically Equivalent Serial Chain (SESC) method. The system utilizes accessible sensors like Kinect for accurate CoM tracking outside the lab.

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Area of Science:

  • Biomechanics
  • Human Motion Analysis
  • Wearable Technology

Background:

  • Accurate estimation of the human center of mass (CoM) is crucial for various applications.
  • Existing methods often require specialized laboratory equipment and controlled environments.
  • Portability and subject specificity are key challenges in real-time CoM estimation.

Purpose of the Study:

  • To develop and present a portable tool for real-time CoM estimation in human subjects.
  • To adapt the Statically Equivalent Serial Chain (SESC) method for subject-specific CoM calculations.
  • To validate the performance of the portable CoM estimation system.

Main Methods:

  • Utilized the Statically Equivalent Serial Chain (SESC) method for subject-specific CoM estimation.
  • Employed accessible sensors, including the Kinect and Wii balance board, for model parameter identification.
  • Leveraged Kinect sensor for real-time CoM tracking after initial parameter identification.
  • Developed a visualization tool to display CoM estimates.

Main Results:

  • Demonstrated the feasibility of using accessible sensors for SESC model identification.
  • Achieved real-time CoM position estimates based on limb orientation measurements.
  • Showcased the portability of the system for use outside traditional laboratory settings.
  • Presented results verifying the performance of the developed CoM tracking tool.

Conclusions:

  • The developed portable tool enables real-time, subject-specific CoM estimation.
  • The SESC method, combined with accessible sensors like Kinect, offers a practical solution for CoM tracking.
  • This approach facilitates CoM analysis in diverse, non-laboratory environments.