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Related Concept Videos

Instantaneous Velocity - I01:15

Instantaneous Velocity - I

The average velocity during a time interval cannot tell us how fast or in what direction a particle is moving at any given time during the interval. To calculate this, it is important to know the instantaneous velocity, which is the velocity at a specific instant of time or at a specific point along the path. Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity vx of an object is the limit of the average...
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To calculate other physical quantities in kinematics, the time variable must be introduced. The time variable not only allows us to state where an object is (its position) during its motion, but also how fast it’s moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position, a particular time is assigned. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity v. This...
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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.
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Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...

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Echo Particle Image Velocimetry
16:31

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Published on: December 27, 2012

Angular velocity measuring interferome.

M Ben-Levy, S G Braun, J Shamir

    Applied Optics
    |June 18, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new optical system uses the Doppler effect to measure angular velocity. This technology aids in understanding how rotation impacts experimental modal analysis.

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    Area of Science:

    • Optics and Photonics
    • Mechanical Engineering
    • Vibrational Analysis

    Background:

    • Experimental modal analysis (EMA) is crucial for understanding structural dynamics.
    • Rotation can significantly influence the vibrational characteristics of structures.
    • Accurate measurement of angular velocity is essential for studying rotational effects in EMA.

    Purpose of the Study:

    • To present a novel optical system for measuring angular velocity.
    • To investigate the influence of rotation on experimental modal analysis.
    • To provide a tool for researchers studying rotating structures.

    Main Methods:

    • Development of a novel optical system.
    • Utilizing the Doppler effect for angular velocity measurement.
    • Integration of the system into experimental modal analysis setups.

    Main Results:

    • The developed optical system successfully measures angular velocity.
    • The system provides data to analyze the effects of rotation on modal parameters.
    • Demonstrated feasibility of the Doppler-based approach for EMA.

    Conclusions:

    • The novel optical system offers a viable method for measuring angular velocity.
    • Rotation has a measurable effect on experimental modal analysis.
    • This technology advances the study of dynamics in rotating systems.