ROTARY KNIFE WITH ELECTROMAGNETIC ACTIVE VIBRATION CONTROL

Title:

ROTARY KNIFE WITH ELECTROMAGNETIC ACTIVE VIBRATION CONTROL

Document Type and Number:

WIPO Patent Application WO2001078954

Kind Code:

A3

Abstract:

A rotary knife (10) incorporates the use of an electronically controlled, active damping system (16, 18) to control vibrations of knife cylinders. The system preferably uses pairs of electromagnetic actuators (106, 108) to provide opposing pulling forces on a ferromagnetic portion of a lever arm (90) that is mechanically coupled to the stationary support shaft (22) for the knife cylinder. Vibration sensors, preferably accelerometers (96, 98), are used to monitor vibrations of the respective knife cylinders. A digital signal processor (100) implementing a state space control system controls the electromagnetic actuators to actively cancel vibration energy in the knife cylinders.

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Inventors:

MICHLER JAMES R

Application Number:

PCT/US2001/012357

Publication Date:

February 21, 2002

Filing Date:

April 16, 2001

Export Citation:

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Assignee:

MARQUIP LLC (US)

International Classes:

B26D7/08; F16F15/02; (IPC1-7): B26D7/08; F16F7/10

Foreign References:

US6032558A	2000-03-07
US4963804A	1990-10-16
US5983168A	1999-11-09
FR2519901A1	1983-07-22
EP0728560A1	1996-08-28
US4548112A	1985-10-22

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