Inspec keywords: observers; stepping motors; machine control; control system synthesis; asymptotic stability; closed loop systems; permanent magnet motors

Other keywords: closed-loop system; angular speed estimation; exponential stabilisation; observer design; load torque estimation; stepping motor; observer-based controller; position regulation; stability analysis; singularly perturbed nonlinear system; permanent-magnet motor; full-order closed-loop system

Subjects: Simulation, modelling and identification; Control system analysis and synthesis methods; Small and special purpose electric machines; Stability in control theory; Control of electric power systems