Design of permanent-magnet eddy-current coupler speed control system based on fully-actuated system model

This note investigates the control design problem of a permanent-magnet eddy-current coupler (PEC) speed control system. To address this, the PEC speed control system is modeled as a fully-actuated system through electrical and kinematic equations. Considering the situation that the system state quantities are not directly accessible, an observer-based controller is developed using the separate design of the observer and state feedback. Meanwhile, a parametric method is adopted to calculate the gain matrix that allows the closed-loop control system to ensure stability while converging at a desired speed. Finally, the obtained results are effectively applied in a PEC speed control system example.