The patented design devices consists of two units arranged around the user’s arm. In each unit, there is a mass-spring-damper system. This mass-spring-damper system represents the absorber system while the user’s arm is considered as the vibrating primary mass. In operation, the absorber mass is oscillating at the same frequency as the primary mass, i.e. arm, but in the opposite direction. For instance, if the arm is moving to the right, the absorber mass is moving to the left, and vice versa. This motion of absorber mass creates counteracting force to reduce the amplitude of the arm tremor. Please see the examples of using the device in the following videos. In these examples, two units are arranged in the Tremelo to address the dominant direction of tremor.
How it Works
The Tremelo is designed based on the principles of dynamic vibration absorber (aka tuned mass damper) that has been proven in various industries. The videos below further illustrates the effect of tuned mass damper. Video #1 explains how a vibration absorber works. Video #2 shows an application of the tuned mass damper in industry.
(Courtesy of RIT students)
(Courtesy of CSA Engineering)