Virtual Reference Feedback Tuning in Restricted Complexity Controller Design of Non-Minimum Phase Systems

Authors:	Sala Antonio, Universidad Politecnica de Valencia, Spain Esparza Alicia, Universidad Politecnica de Valencia, Spain
Topic:	2.1 Control Design
Session:	Control Design I
Keywords:	system identification, reduced order controller, non-minimum phase systems, stability tests

Abstract

This paper discusses the applicability of the identification-based Virtual Reference Feedback Tuning scheme to reduced-order controller design. As the presence of zeros outside the unit circle is quite usual in sampled-data systems, a particular discussion on the topic is carried out. Also, reduced-order controllers identified with the VRFT scheme may not meet the specifications (or even be unstable) so some invalidation tests are needed prior to experiment.