Identification of nonlinear plants under linear control using Youla-Kucera paramet rizat ions

A Parametrization for the closed-loop identification of nonlinear time-varying systems

It has recently been shown that the identification of a linear time-invariant plant using closed-loop measurements with a known linear controller can be effectively tackled by regarding the unknown plant as a member of the set of all plants stabilized by the known linear controller. This set is parametrized by a Youla-Kucera parameter, itself a stable transfer function which, it turns out. can ...

Identification of a nonlinear plant under nonlinear feedback using left coprime fractional based repre~entationsl,~

It has been shown that the set of all nonlinear plants stabilised by a known linear controller, which also stabilises a linear nominal model of the plant, can be parametrised by a stable operator known as the Youla-Kucera parameter. By utilising this description it is possible to convert the closed-loop plant identification problem to one of open-loop identification. This paper extends previous...

Implementation Issues for a Nonlinear Version of the Hansen Scheme

In this paper, we propose a method for the identification of a nonlinear plant under possibly nonlinear feedback; This procedure is a nonlinear extension of a method known as the Hansen scheme in the literature. It is shown that using nonlinear left fractional descriptions one can convert a general nonlinear closed-loop identification problem to one of open-loop identification by parametrizing ...

From Youla-Kucera to Identification, Adaptive and Nonlinear Control

Sample Pages to Be Followed Exactly in Preparing Scripts Adaptive Control of a Coupled Drives Apparatus Using Dual Youla-kucera Parametrization

An adaptive algorithm based on the dual Youla-Kucera parametrization is introduced enabling simple closed-loop identification and adaptation of a class of symmetric MIMO systems. The methodology exploits the algebraic approach to control system design. Necessary conditions for usage of the developed method are discussed and results are presented for the case of coupled drives control. Copyright...