Abstract

The finite-time transition between equilibrium points of the isothermal Van de Vusse CSTR model is considered as a benchmark scenario to present two design approaches of nonlinear feedforward control which do not distinguish between minimum-phase and nonminimum-phase systems in contrast to conventional system inversion techniques. Firstly, since the CSTR model is differentially flat, the flatness-based design can be applied. Secondly, a new approach presented in this contribution treats the transition task as a two-point boundary value problem of the internal dynamics which can be numerically solved by a standard MATLAB function. The two design approaches of nonlinear feedforward control are illustrated for the open-loop tracking control of the CSTR model.

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