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Active vibration control of circular saw blades

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Specific conditions are very frequently established in mechanical systems that contain rotating thin disk-shaped tools, causing undesirable transverse deflections or even vibrations. The excitation mode of rotating tools is mechanical, external loads change with time and in certain cases even self-excitation can occur. The problem can be eliminated by a more rigid design of a disk tool, but because of numerous technological requirements this is unacceptable. It is necessary to combine the basic structure with a system, the operation of which reduces most of the energy produced by the rotating and transversely vibrating tool. An active electromagnetic system for damping lateral vibrations of circular saw blades is presented. This electromagnetic system consists of two electromagnets, mounted transversely to the body that carries a ferromagnetic saw blade. The current running through the two electromagnets is controlled by a robust algorithm, which takes into account the static deformation of the saw blade. An experimental model was used to test the efficiency and operation stability of this system. The results show that the developed system represents a very efficient tool for reducing lateral vibrations of rotating disk tools.

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Correspondence to G. Fajdiga.

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Gospodarič, B., Bučar, B. & Fajdiga, G. Active vibration control of circular saw blades. Eur. J. Wood Prod. 73, 151–158 (2015).

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