Simple Harmonic Quantity

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Simple Harmonic Quantity

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A periodic quantity that is a sinusoidal

function of the independent variable. Thus, γ = A sin ( ωx + φ) where y is the simple harmonic quantity;

A is the amplitude; ω is the angular frequency; x is the independent variable; and φ is the phase of the oscillation. </dd>
The maximum value of the simple harmonic quantity is the amplitude A; it is sometimes called, for emphasis, the single amplitude to distinguish it from double amplitude which for a simple harmonic quantity is the same as the total excursion or peak-to-peak value. When a simple harmonic quantity is expressed as a complex quantity, the term amplitude must be used with caution in view of possible confusion with the alternate meaning of amplitude as the angle or argument of a complex quantity. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use