Patent ID: 7192014

Claim:
An active vibration isolation support system comprising: an elastic body that receives a load from a vibrating body; a liquid chamber having a wall of which at least a part is formed from the elastic body; an actuator having a moveable core that moves out and back by the actuator receiving a supply of current according to a vibrational state of the vibrating body, the actuator having a sealed internal space formed therein; a movable member that is moved out and back by the moveable core of the actuator so as to change the capacity of the liquid chamber; and a controller which controls the current that is supplied to the actuator; wherein pressure of the sealed internal space of the actuator is changed by the movable member moving out and back, wherein said sealed internal space of the actuator is defined on a side of said movable member opposite the side at which said liquid chamber is defined, and said movable core is in fluid communication with said sealed internal space, and the controller controls the thrust of the movable member so as to be substantially constant by supplying current to the actuator according to a change in the pressure of the sealed internal space, wherein the controller increases the current that is supplied to the actuator in order to counterbalance a decrease in thrust generated by an increase in the pressure of the sealed internal space which is caused by a movement of the movable member.