Structurally stable regulation for synchronous motors

In this paper a structurally stable regulator is derived for permanent magnet synchronous motors. This regulator ensures the asymptotic tracking of a given angular velocity in presence of disturbances, due to the load torque, parameter variations and uncertainties. The reference inputs and disturbances are considered to be generated by autonomous differential equations, constituting the so-called exosystem. The performance of the structurally stable regulator are compared with more classical controllers.