Signals and systems
Vibrations
Article REF: BR200 V1
Signals and systems
Vibrations

Author : Jacques PLUSQUELLEC

Publication date: April 10, 2004, Review date: October 1, 2021 | Lire en français

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1. Signals and systems

1.1 Signals

This very general term refers to any quantity that can have an effect on a structure to modify its equilibrium or behavior: force, tension, acceleration, speed, sound pressure, etc.

To simplify matters, we can classify the various signals into one of the following categories.

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1.1.1 Harmonic signals

They are of the form : x (t)=a  cos  (ωt+φ)ou  x (t)=a  sin  (ωt+φ)

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