Active Hybrid Control Algorithm with Sky-Hook Damping and Lead-Lag Phase Compensation for Multi-DOFs Ultra-Low Frequency Active Vibration Isolation System

Figure 14

The response curves under different excitation conditions, the red line for passive with kg and  N/m, the blue line for absolute velocity feedback (sky-hook damping) with , and the green line for active (AHC: absolute velocity feedback control with   and lead-lag phase compensation feedforward control with , Hz, and Hz): (a) impulse response and (b) random response.

(a)

(b)