In this paper, the effects of the force factor of a voice coil actuator for active vibration isolation system is investigated. Two sets of experiments are conducted to characterize the actuating force of the actuator. The first experiment is concerned on the value of force factor when the voice coil is excited at different low frequencies with a constant stroke length. Meanwhile, the effect of varying the distance of the permanent magnet from the electrical coil is studied in the second experiment. The results has showed the significant influence of force factor in generating the driving force for an active vibration isolation system.
