On the Computation of $π$-Flat Outputs for Linear Time-Delay Systems

Details On the Computation of $π$-Flat Outputs for Linear Time-Delay Systems On the Computation of $π$-Flat Outputs for Linear Time-Delay Systems

2009-10-19

arxiv.org/abs/0910.3619v2

Mathematics

Optimization and Control

Submitted to journal "Linear Algebra and its Applications"

Scientific paper

This paper deals with linear time-varying, delay systems. Extensions of the concept of differential flatness \cite{Fliess_95} to this context have been first proposed in \cite{Mounier_95,Fliess_96} (see also \cite{Rudolph_03,Chyzak_05}), by the introduction of $\pi$-flat output. Roughly speaking, it means that every system variable may be expressed as a function of a particular output $y$, a finite number of its time derivatives, time delays, and predictions, the latter resulting from the prediction operator $\pi^{-1}$. We propose a simple and constructive algorithm for the computation of $\pi$-flat outputs based on concepts of polynomial algebra, in particular Smith-Jacobson decomposition of polynomial matrices. Some examples are provided to illustrate the proposed methodology.

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