A Variable Parameter Ambient Vibration Control Method Based on Quasi-Zero Stiffness in Robotic Drilling Systems

Vibrations in the aircraft assembly building will affect precision of robotic drilling system. A variable stiffness and damping semiactive vibration control mechanism with quasi-zero characteristics is developed. The realized by parallel connection four vertically arranged bearing springs two symmetrical horizontally negative elements. Firstly, parameters at static equilibrium position are obtained through analysis. Secondly, harmonic balance method used to deal differential equations motion. effects every parameter on displacement transmissibility analyzed, strategies proposed. Finally, system responses passive isolation mechanisms segmental frequency excitations compared virtual prototype experiments. results show that range widened, stability effectively improved without resonance method. It innovative significance for ambient systems.