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  2. Pendulum (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Pendulum_(mechanics)

    The above discussion focuses on a pendulum bob only acted upon by the force of gravity. Suppose a damping force, e.g. air resistance, as well as a sinusoidal driving force acts on the body. This system is a damped, driven oscillator, and is chaotic. Equation (1) can be written as

  3. Harmonograph - Wikipedia

    en.wikipedia.org/wiki/Harmonograph

    A harmonograph creates its figures using the movements of damped pendulums. The movement of a damped pendulum is described by the equation = ⁡ (+),in which represents frequency, represents phase, represents amplitude, represents damping and represents time.

  4. Harmonic oscillator - Wikipedia

    en.wikipedia.org/wiki/Harmonic_oscillator

    A simple harmonic oscillator is an oscillator that is neither driven nor damped.It consists of a mass m, which experiences a single force F, which pulls the mass in the direction of the point x = 0 and depends only on the position x of the mass and a constant k.

  5. Pendulum - Wikipedia

    en.wikipedia.org/wiki/Pendulum

    "Simple gravity pendulum" model assumes no friction or air resistance. A pendulum is a device made of a weight suspended from a pivot so that it can swing freely. [1] When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

  6. Centrifugal pendulum absorber - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pendulum_absorber

    The centrifugal pendulum absorber was first patented in 1937 by R. Sarazin [1] and a different version by R. Chilton in 1938. [2] Generally, both Sarazin and Chilton are credited with the invention. Sarazin's work was used during World War II by Pratt & Whitney for aircraft engines with increased power output.

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  8. Damping - Wikipedia

    en.wikipedia.org/wiki/Damping

    The damping ratio is a system parameter, denoted by ζ ("zeta"), that can vary from undamped (ζ = 0), underdamped (ζ < 1) through critically damped (ζ = 1) to overdamped (ζ > 1). The behaviour of oscillating systems is often of interest in a diverse range of disciplines that include control engineering , chemical engineering , mechanical ...

  9. Furuta pendulum - Wikipedia

    en.wikipedia.org/wiki/Furuta_pendulum

    Each rotational joint is viscously damped with damping coefficients and , where is the damping provided by the motor bearings and is the damping arising from the pin coupling between Arm 1 and Arm 2. A right hand coordinate system has been used to define the inputs, states and the Cartesian coordinate systems 1 and 2.

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