I have a magnetically permeable element (98% pure iron) vibrating at 3-5Hz between two electromagnets (with iron cores) which is experiencing too much damping, presumably due to eddy current losses.
I know I can reduce this damping by constructing my vibrating element from thin laminated layers, or by using an electrically non-conductive material (ferrite?).
Is it possible to produce a damping reduction via control system? I'm imagining sensing the displacement/velocity of the core versus time and using this to somehow vary the power output to the solenoid coils.
If it's possible, I'd be grateful for details on how it would work.
The vibrating element is cylindrical with approx 35mm diameter. My end goal is to electromagnetically control the (negative) stiffness of a system without adding much damping.