State space adaptive control for a rigid rotor excited by nonconservative cross-coupling forces

Abstract

In this paper an adaptive state space controller for a rigid rotor suspended in active magnetic bearings is presented. Based on a discrete time state space model in controller canonical form a recursive adaptation algorithm is used to estimate both all system parameters and all states. A pole placement controller with additional integrative feedback is then calculated upon the identified model. The entire control concept was tested by means of simulation. Simulation runs of the closed loop system including the proposed algorithm show the successful operation for changes of system parameters, in this case the sudden appearance of non-conservative cross-coupling forces, as generated by seals, for example.

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