# oscillation

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Related to oscillation: damped oscillation

## Oscillation

Any effect that varies in a back-and-forth or reciprocating manner. Examples of oscillation include the variations of pressure in a sound wave and the fluctuations in a mathematical function whose value repeatedly alternates above and below some mean value.

The term oscillation is for most purposes synonymous with vibration, although the latter sometimes implies primarily a mechanical motion. The alternating current and the associated electric and magnetic fields are referred to as electric (or electromagnetic) oscillations.

If a system is set into oscillation by some initial disturbance and then left alone, the effect is called a free oscillation. A forced oscillation is one in which the oscillation is in response to a steadily applied periodic disturbance.

Any oscillation that continually decreases in amplitude, usually because the oscillating system is sending out energy, is spoken of as a damped oscillation. An oscillation that maintains a steady amplitude, usually because of an outside source of energy, is undamped. See Anharmonic oscillator, Damping, Forced oscillation, Harmonic oscillator, Vibration

## oscillation

[‚äs·ə′lā·shən]
(control systems)
(mathematics)
The oscillation of a real-valued function on an interval is the difference between its least upper bound and greatest lower bound there.
The oscillation of a real-valued function at a point x is the limit of the oscillation of the function on the interval [x-e, x + e ] as e approaches 0. Also known as saltus.
(physics)
Any effect that varies periodically back and forth between two values.
References in periodicals archive ?
The main oscillatory component in the variability is an (amplitude-modulated) diurnal oscillation (i.e.
Thus, detecting oscillations in process variables such as valve and damper openings, fan speeds, and volume flow rates becomes one of the tools by which problems with HVAC system operations can be identified.
PBCS-20 exhibits stress oscillation, whereas comparatively both neat PBS and PCS do not have the similar phenomenon.
where [delta] is the pusher oscillation amplitude, h is the piezoelectric plate thickness, a = 53.247361, b = = 2.9480015, c = 0.50561783 are the coefficients.
There was a considerably lower peak frequency of the gamma oscillations in the ASD group.
To study the horizontal oscillations, the place of contact of the load mass with the magnetic table is horizontally displaced in a certain distance and the position of the load is fixed by the activation of a magnetic fixture.
In general, the bubble oscillation mode increased monotonously with the radius within a certain frequency.
Throughout the last one and a half decades, increasing attention has been paid to fast and ultrafast electroencephalographic (EEG) oscillations as a measurable electrophysiological component of potentially pathological brain activity.
In this study, the H+-Mn2+-CH COCH -BrO - was used as the chemical oscillation system to investigate the influences of electrochemical fingerprints of Radix Paeoniae Alba in terms of temperature, stirring rate, dosage, hydrogen ion concentration, etc.
National Oceanic and Atmospheric Administration's Geostationary Operation Environmental Satellite (GOES), which resides in near-Earth space, made the observations that detected the oscillations. The satellite studies the sun from Earth's perspective by collecting X-ray and extreme ultraviolet irradiance data.
In the next section, we present clear explanation regarding the ability of the S-shaped profile to cancel the residual oscillation and show how this motion profile can be used as a solution for quay crane cargo oscillation reduction.
Currently a variety of experimental methods for the study of influence of pressure on the oscillations ShdH and dHvA are tested in new types of semiconductors.

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