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Related Concept Videos

Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

595
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
595
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

784
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.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
784
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

701
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
701
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

624
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
624
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

446
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
446
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

659
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. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
659

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Related Experiment Videos

A novel method for quantifying arm motion similarity.

Zhi Li, Kris Hauser, Jay Ryan Roldan

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 7, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new method to measure arm motion similarity, revealing how stroke affects arm coordination. It found synchronized arm movements in bimanual tasks are stronger at important joints, with the paretic arm influencing the healthy arm’s motion.

    Related Experiment Videos

    Area of Science:

    • Biomechanics
    • Rehabilitation Science
    • Robotics

    Background:

    • Quantifying arm motion similarity is crucial for understanding motor control and evaluating rehabilitation outcomes.
    • Existing methods often lack task independence or require synchronized movements.

    Purpose of the Study:

    • To develop and validate a novel, task-independent method for quantifying arm motion similarity.
    • To apply this method to analyze the coordination patterns between healthy and paretic arms in chronic stroke patients.

    Main Methods:

    • A task-independent approach plotting time-normalized kinematic/dynamic curves against each other.
    • Generation of four real-valued features to capture motion similarity.
    • Application to unimanual and bimanual arm motions of eight chronic stroke patients.

    Main Results:

    • The developed features effectively quantify arm motion similarity.
    • Inter-arm coupling in bimanual motions shows stronger synchronization at task-relevant joints.
    • The paretic arm suppresses non-paretic shoulder flexion, while the non-paretic arm encourages paretic shoulder rotation.

    Conclusions:

    • The novel method provides a versatile tool for analyzing arm motion patterns.
    • Findings offer insights into altered inter-arm coordination post-stroke.
    • Understanding these dynamics can inform targeted rehabilitation strategies.