Vibration damping system

Details Vibration damping system Vibration damping system

1993-07-02

1995-01-03

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

310 51, B64C 1706

Patent

active

053789741

ABSTRACT:
The smart patch includes two piezoceramic actuators which operate on both sides of a structural member at the same fixed distance from the neutral axis to produce a bending method. The piezoceramic actuators are configured such that when subjected to a voltage, one shrinks and one expands. This provides the moment. One piezoceramic could also be used to provide half the moment provided that it was the same distance from the neutral axis of the structural member. There is a piezoceramic sensor that senses the vibrational mode to be suppressed. Finally there are control electronics that consist of a charge amplifier, a two pole low pass filter and a bridge amplifier. All of these elements are integrated into one entity.

REFERENCES:
patent: Re33028 (1989-08-01), Simpson
patent: 4080636 (1978-03-01), Ravizza
patent: 4229692 (1980-10-01), Graeme
patent: 4633982 (1987-01-01), Swigert
patent: 4929874 (1990-05-01), Mizuno et al.
patent: 5156370 (1992-10-01), Silcox et al.
patent: 5251264 (1993-10-01), Tichy

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