Electronic controller for an adaptively tuned vibration absorber

Details Electronic controller for an adaptively tuned vibration absorber Electronic controller for an adaptively tuned vibration absorber

1995-11-15

1998-01-20

Voeltz, Emanuel T.

Boots, shoes, and leggings

324 7677, F16F 1300

Patent

active

057107149

ABSTRACT:
An apparatus for absorbing vibrations in a structural member has a mass suspended between two mounting plates by a separate springs. The mass has two sections and a mechanism for adjusting the spacing between the sections to alter the spring stiffness. Two sensors produce first and second signals representing the vibration of the structural member and the mass. The mechanism is operated by a controller that includes separate filters for the first and second signals in which each filter has a center frequency that is tuned by a clock signal. The phase comparator produces a phase output signal indicating a phase relationship between signals from the two filters and the control signal for the mechanism is produce in response to the phase output signal. A phase locked loop produces the clock signal for tuning the filters in response to a comparison between one of the first and second signals and a signal from one of the filters.

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