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A vibration machine is device for subjecting a system
to controlled and reproducible mechanical vibration. Vibration machines,
commonly called shake tables or shakers,
are widely used in vibration measurement
and analysis. There are three types of vibration machines in general
use. These are the mechanical
direct-drive type, the mechanical
reaction type, and the electrodynamic
type. Other types, such as hydraulic excitation devices, resonant
systems, piezoelectric vibration generators used for instrument calibration,
and machines for testing packages, have only limited or specialized applications.
(Read more about shakers and related
equipment).
 Example of horizontal-force testing shaker |
 Example of vertical-force testing shaker |
