The Principle of Vibration Isolation: Stable Technology from Fundamental Theory to Innovative Applications

Bywenqi
The Principle of Vibration Isolation: Stable Technology from Fundamental Theory to Innovative Applications

The Principle of Vibration Isolation: Reconfiguring Vibration Transmission Pathways Through Elastic Connections

The core of vibration isolation lies in replacing rigid connections with elastic support systems to block the direct transmission of vibrational energy from the source to the receiving structure. When equipment generates vibrations, elastic components (such as springs or rubber isolators) absorb kinetic energy through deformation and dissipate it as thermal energy or other forms via their damping characteristics.

Active vs. Passive: Dual-Mode Vibration Control Strategies

Vibration isolation technology falls into two categories: passive and active isolation. Passive isolation relies on the inherent physical properties of materials—air springs absorb low-frequency vibrations through gas compression, while rubber isolators utilize friction energy dissipation from polymer chains. Active isolation employs sensors to monitor vibration signals in real time, driving electromagnetic actuators or piezoelectric ceramics to generate counteracting forces that directly cancel vibration waves.

LeadTop’s LHV series active vibration isolation modules employ air springs with pendulum decoupling design, combined with six-degree-of-freedom precision active control. They achieve a vibration transmission ratio ≤ -30dB in the 0.5–20Hz frequency band, support ±2μm  compensation, and deliver an 8ms fast response, providing a nanometer-level stable environment for quantum research and similar applications.

LeadTop's LHV series active vibration isolation modules

Vibration Isolation Effect Evaluation: Synergy of Frequency Ratio and Damping

The vibration isolation effect depends on the frequency ratio (f/fn) and damping ratio (ζ). When the frequency ratio exceeds 1.414, the system enters the effective vibration reduction zone, where the transmission rate decreases as the frequency ratio increases. The damping ratio influences the resonance peak amplitude, providing moderate suppression; however, excessively high damping reduces high-frequency isolation efficiency.