Patent ID: 6315094
Filing Date: 2001-11-13
Classification: F16F

Abstract:
A passive virtual skyhook vibration isolation system for minimizing the transmission of external disturbances to a primary mass, said primary mass having a resonance frequency, said virtual skyhook system comprised of:a. said primary mass connected to an external base by a primary suspension system comprised of a primary spring and a primary damping means through which external disturbances are transmitted, wherein said suspension system uses low damping to provide low transmissibility of external disturbances at high frequencies relative to said primary mass's resonant frequency; andb. a secondary mass connected to said primary mass by a secondary suspension system comprised of a secondary spring and a secondary damping means, wherein said secondary suspension is tuned approximately to said primary mass's resonant frequency, thereby providing a large damping contribution at resonance to said primary mass thereby limiting said primary mass motion at resonance while producing little damping contribution at frequencies above resonance, which maintains low transmissibility.