Nuevo método de identificación usando la respuesta escalón para sistemas de fase no mínima de segundo orden
Abstract
RESUMEN
Este artículo presenta un nuevo método de identificación para sistemas de fase no mínima basado en la respuesta escalón. El enfoque propuesto provee un modelo aproximado de segundo orden evitando diseños experimentales complejos. El método propuesto es un algoritmo de identificación cerrado basado en puntos característicos de la respuesta escalón de sistemas de fase no mínima de segundo orden. Él es validado usando diferentes modelos lineales. Ellos tienen respuesta inversa entre 3,5% y 38% de la respuesta en régimen permanente. En simulaciones, ha sido demostrado que resultados satisfactorios pueden ser obtenidos usando el procedimiento de identificación propuesto, donde los parámetros identificados presentan errores relativos medios, menores que los obtenidos mediante el método de Balaguer.
Palabras clave: Identificación, respuesta escalón, sistemas de fase no mínima.
ABSTRACT
This paper presents a novel identification method for non-minimum phase systems based on the step response. The proposed approach provides a linear second-order model approximation avoiding complex experimental design. The proposed method is a closed identification algorithm based on characteristic points of the second order non minimum phase system step response. It is validated using different linear models. They have inverse response between 3,5% and 38% of the final steady state response. In simulations, it has been shown that satisfactory results can be obtained using the proposed identification procedure, where the identified parameters present mean relative errors lower than those obtained by Balaguer’s method.
Keywords: Identification, step response, non-minimum phase systems.
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