Systems and methods for producing a pure vibration force from a synchronized dual array of eccentric rotating masses

Abstract

Aspects of the technology employ components to control and combine the vibration outputs of two vibration motors into essentially a pure vibration force, which can be controlled to output a given frequency and amplitude, produce beat frequencies, and produce brief impulses. For instance, identical attachment elements are affixed to a vibration device but do not contact each other during operation. Such attachment elements are able to cancel undesired torque vibrations to provide a combined pure force vibration output. The attachment elements may be secondary eccentric rotating masses affixed to the shaft of a vibration motor. Along with the vibration motor's primary eccentric rotating mass, these elements can cancel out unwanted parasitic torque vibrations by producing counter-torque vibrations.