Experimental Vibration Control of a Single-Degree of Freedom System Using a State-Switched Absorber

A state-switched absorber (SSA) is a device capable of instantaneously switching between resonance frequencies, increasing its effective bandwidth as compared to classical tuned vibration absorbers (TVAs) for vibration control. Previous simulations show that for a system subjected to a multi-harmonic disturbance, the SSA reduces vibration more effectively than classical TVAs. This study considers the experimental performance of the SSA for vibration suppression of an elastically mounted lumped mass base. State switching is achieved using a clutch to connect or disconnect a coil spring in parallel with other coil springs. An SSA system outperforms a classical TVA system for several combinations of forcing frequencies.