This paper presents a tuned positive position feedback controller (TPPF) to overcome the dual high peaks of the classical PPF.This control Hair Removal signal is merged with a proportional-derivative (PD) control signal to suppress the vibrations of a constant-stiffness 16-poles rotor active magnetic bearings (AMBs) system.Another benefit of the applied TPPF is turning the rotor’s quasiperiodic unstable motion into a periodic stable motion by eliminating both saddle-node and Hopf points.
The whole group equations of motion are derived and their approximate solutions are sought with the aid of LUTEIN + ZEAXANTHIN the multiple scales method.Different response curves are plotted to clarify the difference between the rotor’s vibratory behaviors before and after PPF and also with TPPF.