Vibration Suppression of Ship-Mounted Antennas Using a Nonlinear Passive Vibration Isolator

We are aiming to improve the performance of a passive vibration isolator for ship-mounted antennas by designing the parameters of the isolator including nonlinear springs and dampers. It is known that a passive isolator has an inevitable problem, trade-off between minimizing the magnification of resonance and suppressing the magnifications in the region of high-frequency into lower levels. To solve this problem, we introduce a nonlinear model with more design parameters and adopt an optimization method, that is, minimizing the evaluation function consisting of two terms which indicate effects on resonant magnification and vibration isolation. By this approach, several available solutions, which can improve vibration isolation performance while with reduced magnification of resonance, are obtained.