Rotary knife with active vibration control
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United States of America Patent
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-
Mar 7, 2000
Grant Date -
N/A
app pub date -
Mar 20, 1998
filing date -
Mar 20, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotary knife incorporates the use of an electronically controlled, tuned mass active damping system to control vibrations of the knife cylinder. The system preferably uses one or more electromagnetic actuators to provide force on a tuned mass which is mechanically coupled to the knife cylinder. Vibration sensors, preferably accelerometers, are used to monitor vibrations of the respective knife cylinders and tuned masses. A digital signal processor implementing a state space control system controls the electromagnetic actuators to remove vibration energy from the system. An active damping system in accordance with the invention is more effective in removing vibration energy than passive systems, especially in heavy-duty applications.
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