![]() The force of a vibration motor is governed by the equation: This helps us plot our Typical Performance Characteristics graph. We measure the vibration amplitude by mounting the motor on a known target mass and reading the results from an accelerometer. Therefore we are interested in the whole system (motor + target mass). Vibration motors are not used on their own – they’re attached to a product/device/piece of equipment that is intended to vibrate. ![]() But why do we express the vibration amplitude as acceleration (G) instead of a force (N) or the displacement (mm)? Why not use Displacement (mm) or Force (N)? What we feel as vibrations are simply the object being repeatedly displaced and a very high frequency. It leaves some of our customers with the question exactly what is G? Our vibration motors and linear resonant actuators use the unit G to describe their vibration amplitude. But why do we express the vibration amplitude as acceleration (G) instead of a force (N) or the displacement (mm)? Measuring Vibration in G Well, 1 G is equal to the acceleration from gravity: Our vibration motors and linear resonant actuators use the unit G to describe their vibration amplitude. Those looking for the Quick Vibe Estimator will find the tool in AB-031: Vibration Motor Calculators – ERMs and LRAs
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