This master’s thesis investigates the possibility of replacing the traditional triple cascaded Proportional-Integral (PI) controller architecture, used to regulate a PermanentMagnet Synchronous Motor (PMSM), with a state-space approach. Using theory regarding PMSMs and Electromechanical Actuators (EMAs) as a foundation, the thesisdescribes the design process of the proposed control methods up until implementation.

The two state-space approaches evaluated in the thesis are: a single Linear-QuadraticRegulator (LQR) method and a torque reference generating LQR together with a setof two PI controllers for current regulation. Evaluation of the chosen methods wasdone based on simulations in Simulink/Simscape, containing verified models mimicking real hardware, with several input cases.

Based on simulation results, the combined LQR and PI method was deemed promisingto replace the current cascaded PI control architecture. The open end of the reportallows for further implementation and evaluation on the real platform to confirm theresults obtaiend through simulations.