A Robust Adaptive Flux Observer for a Class of Electromechanical Systems

摘要

The problem of designing a flux observer for magnetic field electromechanicalsystems from noise corrupted measurements of currents and voltages is addressedin this paper. Imposing a constraint on the systems magnetic energy function,which allows us to construct an algebraic relation between fluxes and measuredvoltages and currents that is independent of the mechanical coordinates, weidentify a class of systems for which a globally convergent adaptive observercan be designed. A new adaptive observer design technique that effectivelyexploits the aforementioned algebraic relation is proposed and successfullyapplied to the practically important examples of permanent magnet synchronousmotors and magnetic levitation systems.