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

Figure 17

The vibration transmissibility curves, the red solid line for passive (passive), the blue dashed line for active (absolute velocity feedback control alone, with ), and the green dash and dot line for active (absolute velocity feedback control with   and LLPC feedforward control with , Hz, and Hz): (a) X, (b) Y, and (c) Z.

(a)

(b)

(c)