Vibration isolation system using zero-power magnetic suspension is modified to be equipped with a weight support mechanism. The original system has a problem that the whole weight of the isolation table must be supported solely by the attractive force produced by permanent magnets. It is an obstacle to develop large isolation tables. In order to overcome this obstacle, a weight support mechanism is introduced in parallel with the serial connection of a zero-power magnetic suspension system and a normal spring. It can reduce the static load force that the zero-power magnetic suspension has to support. The basic characteristics of the modified system are shown analytically. Experimental study demonstrates that the modified system maintains infinite stiffness against direct disturbance even if such a weight support mechanism is added.
This paper presents a six-axis hybrid vibration isolation system by an active zero-power control in combination with a passive weight support mechanism in order to develop a large vibration isolation table. The use of active zero-power control and weight support mechanism is the salient feature of the proposed system which enables to develop a vibration isolator with low power consumption and low cost. The system is capable to isolate as well as to control vibrations from different sources in addition to suppress large payloads or support large table. The basic characteristics of the developed system are elaborately discussed analytically. The proposed control technique can control all the motions of the system. The performance of the controller is evaluated by conducting several experiments.
This paper presents a six-axis hybrid vibration isolation system by an active zero-power control in combination with a passive weight support mechanism in order to develop a large vibration isolation table. The use of active zero-power control and weight support mechanism is the salient feature of the proposed system which enables to develop a vibration isolator with low power consumption and low cost. The system is capable to isolate as well as to control vibrations from different sources in addition to suppress large payloads or support large table. The basic characteristics of the developed system are elaborately discussed analytically. The proposed control technique can control all the motions of the system. The performance of the controller is evaluated by conducting several experiments.