On stable right-inversion of non-minimum-phase systems

The paper deals with the characterization of a dummy ’output function’ associated with the stable component of the zero-dynamics of a linear square multi-input multi-output system. With reference to the 4-Tank dynamics, it is shown how such a procedure, applied to the linear tangent model of a nonlinear plant, may be profitably applied to assure local stability in closed loop.

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