Abstract
Vibration presents a major challenge to advanced experiments in physics and life sciences, as well as to precise manufacturing processes. A vibration-isolated platform had become an indispensable element of precision experimental and manufacturing systems. Ideally, the platform should behave as an absolutely rigid body; unfortunately, absolutely rigid bodies do not exist: any structure deviates from the rigid behavior at its resonance frequencies. Resonance vibrations of the platform carrying precision optomechanical or acoustical equipment can be excited by acoustical inputs, residual vibrations coming from the floor through vibration isolators, and atmospheric turbulence. These vibrations must be mitigated by dissipation of mechanical energy, or damping. This paper summarizes current methods and achievements in active and passive damping of optical tables and breadboards, applicable also to other types of structures. Dynamic response of an isolated platform is analyzed. Physical principles of active damping systems, multiple tuned dynamic absorbers, and elastomeric constrained-layer damping links are presented; various designs of damping devices are considered, and their operation illustrated by experimental results; advantages and shortcomings of each method are discussed.
Published Version
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