Vibration insulating apparatus and method

A vibration insulating apparatus comprising:

• a vibration insulating mount disposed between a vibrating body and a mounting body, said vibration isolation mounting device insulating mount having a fluid chamber filled with fluid, an elastic support partly defining said fluid chamber, a movable member partly defining said fluid chamber, a resilient member resiliently supporting said movable member, and an actuator generating displacing force for said movable member according to a drive signal so as to change volume of said fluid chamber;
• a reference signal generating device detecting a vibrating condition of said vibrating body and outputting a reference signal indicative of said vibrating condition;
• a residual vibration signal generating device detecting a residual vibration of said mounting body and outputting a residual vibration signal indicative of said residual vibration;
• and
• a driving control device calculating said driving signal output to said actuator according to said reference signal and said residual signal so as to reduce vibration transmitted from said vibrating body to said mounting body, and said driving control device outputting said driving signal to said actuator by use of low-pass filter processing,
• wherein a cutoff frequency used in said low-pass filter processing is set in accordance with a state of a load applied to said vibration insulating mount.