Importance

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Abstract

A vibration reduction system including a base, a disturbance generating device, and at least one active mount connecting the base and disturbance generating device for imparting a force at a point on the base to minimize the transmission of the disturbance to the base. The active mount includes a passive element on which the disturbance generating device is supported, an actuator for imparting a force on at least the base, a sensor located on the base for sensing the total force imparted by the active mount at the selected point and generating a corresponding signal, and a controller for generating an input signal corresponding to the force to be imparted by the actuator on at least the base and sending the input signal to the actuator. The controller regulates an impedance error as a function of the signal received from the sensor to generate the input signal. The force imparted by the active mount at the selected point on the base substantially counteracts the disturbance applied to the base by the disturbance generating device. The active mount further includes a second sensor located on the base for detecting a velocity or acceleration of the base at the point on the base. The invention also includes a method of reducing vibrations of a base caused by a disturbance generating device mounted on the base via an active mount.

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First Claim