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  2. Vibration-powered generator - Wikipedia

    en.wikipedia.org/wiki/Vibration-powered_generator

    Generally, the coil is made using a diamagnetic material as these materials have weaker interactions with the magnet that would dampen the vibration. The main advantage of this type of generator is that it is able to produce more power than the piezoelectric generators. [1] Electromagnetic based vibration-powered generators have been ...

  3. Centrifugal pendulum absorber - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pendulum_absorber

    Schaeffler torque converter with centrifugal pendulum absorber. A centrifugal pendulum absorber is a type of tuned mass damper. It reduces the amplitude of a torsional vibration in drive trains that use a combustion engine.

  4. Rotordynamics - Wikipedia

    en.wikipedia.org/wiki/Rotordynamics

    Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage.

  5. Critical speed - Wikipedia

    en.wikipedia.org/wiki/Critical_speed

    The first vibrational mode corresponds to the lowest natural frequency. Higher modes of vibration correspond to higher natural frequencies. Often when considering rotating shafts, only the first natural frequency is needed. There are two main methods used to calculate critical speed—the Rayleigh–Ritz method and Dunkerley's method. Both ...

  6. Dynamic modulus - Wikipedia

    en.wikipedia.org/wiki/Dynamic_modulus

    Dynamic modulus (sometimes complex modulus [1]) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation).

  7. Piezoelectric accelerometer - Wikipedia

    en.wikipedia.org/wiki/Piezoelectric_accelerometer

    The development of the commercial piezoelectric accelerometer came about through a number of attempts to find the most effective method to measure the vibration on large structures such as bridges and on vehicles in motion such as aircraft. One attempt involved using the resistance strain gage as a device to build an accelerometer.

  8. Transmissibility (vibration) - Wikipedia

    en.wikipedia.org/wiki/Transmissibility_(vibration)

    Transmissibility is the ratio of output to input.. It is defined as the ratio of the force transmitted to the force applied. Transmitted force implies the one which is being transmitted to the foundation or to the body of a particular system.

  9. Electric power conversion - Wikipedia

    en.wikipedia.org/wiki/Electric_power_conversion

    A power converter is an electrical device for converting electrical energy between alternating current (AC) and direct current (DC). It can also change the voltage or frequency of the current. Power converters include simple devices such as transformers , and more complex ones like resonant converters .