Abstract: In this paper, a feedback control strategy is proposed for multi-harmonic and multi-channel systems, specifically for active vibration control systems on floating rafts subjected to multi-equipment excitation. The errors serve as controller inputs, then the desired signals are reconstructed and compensated in magnitude and phase to eliminate the influence of secondary paths on the controller output responses. With the advantages of low computational burden, rapid response, and robust stability, the algorithm's effectiveness is validated through comprehensive single- and multi-channel, simulated and experimental tests conducted on a two-stage active isolation rig.