Johnson, K. W. Vibra-Grip Corporation, Jamestown, Ohio.
- Direct-drive machine
- Reaction-type machine
- Electrodynamic machine
- Additional Readings
A device for subjecting a system to controlled and reproducible mechanical vibration. Vibration machines, commonly called shake tables, 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.
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