Rotary knife with electromagnetic active vibration control
US6389941B1 · kind B1 · utility
30Cited by
27References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9459
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary knife incorporates the use of an electronically controlled, active damping system to control vibrations of knife cylinders. The system preferably uses pairs of electromagnetic actuators to provide opposing pulling forces on a ferromagnetic portion of a lever arm that is mechanically coupled to the stationary support shaft for the knife cylinder. Vibration sensors, preferably accelerometers, are used to monitor vibrations of the respective knife cylinders. A digital signal processor implementing a state space control system controls the electromagnetic actuators to actively cancel vibration energy in the knife cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.