JORDAN Mario Alberto
congresos y reuniones científicas
Adaptive Control of Non-Minimum Phase Unstable Systems by Constraction Transforms
ORQUEDA, O.; JORDAN, MARIO
Congreso; VII Reunión de Procesamiento de la Información y Control (VII RPIC); 1997
VII Reunión de Procesamiento de la Información y Control (VII RPIC)
In this work a method for discrete-time indirect adaptive control of linear unstable nonminimum phase systems using inverse modeling of the plant by means of truncated expansions is proposed. The key idea consists in contracting the domain of the model radially in z plane in order for the controller design to be performed on the basis of a stable model. It is shown that the contraction transform between system and model is also homomorphic. Asymptotic convergence of the controller parameters into a compact set is probed. The method presents advantages, after all, in the commissioning phase of the adaptive control since it does not require any important previous knowledge of the plant, other than an upper bound for modulus of the singularity and zeros of the plant transfer function. The method can reach a high control performance as the controller parameters are tuned by minimization of the regulation error energy.