This paper deals with the decentralized overlapping control of interconnected systems. The notion of a quotient overlapping fixed mode (QOFM) is first introduced and it is shown that a mode of an interconnected linear time-invariant system can be shifted by means of a general decentralized overlapping controller if and only if it is not a QOFM. It is then asserted that any interconnected system...

The state-derivative feedback has received great attention in recent times, for being an alternative to the state feedback and to be capable of, except in the cases where it has at least Artigo submetido em 06/11/2006 (Id.: 00764) Revisado em 19/03/2007, 10/04/2008, 03/03/2009 Aceito sob recomendação do Editor Associado Prof. Liu Hsu one pole in origin, to provide the known pole assignment of a...

This paper study the main theoretical properties of Quantized State Control (QSC) applied to linear time invariant (LTI) systems. Using a previous result on perturbed systems, a closed formula for the quantization design is deduced. It is shown that the mentioned formula ensures that the difference between the trajectories of the Continuous Control System (CCS) and the QSC system is bounded by ...

Model reduction of large-scale linear time-invariant systems is an ubiquitous task in control and simulation of complex dynamical processes. We discuss how LQG balanced truncation can be applied to reduce the order of large-scale control problems arising from the spatial discretization of time-dependent partial differential equations. Numerical examples on a parallel computer demonstrate the ef...

In this paper, state-derivative and especially output-derivative feedbacks for linear time-invariant systems are derived using control approach similar to linear quadratic regulator (LQR). The optimal feedback gain matrices are derived for the desired performance. This problem is always solvable for any controllable system if the open-loop system matrix is nonsingular. Explicit expression of th...

-In this paper a design procedure for construction of reduced order unknown input observer, for linear time invariant system subjected to unknown input is presented based on generalized matrix inverse. Das & Ghosal observer is extended and used for this purpose. A condition is proposed and to be satisfied to develop such an observer. Finally an illustrative numerical example of a class of guide...

We introduce a balancing-related method for the reduction of linear time-invariant systems whose initial value is not necessarily vanishing. An error bound for the presented reduction method is provided.

Bounded-input bounded-output stability conditions for fractional-order linear time-invariant (LTI) system with multiple noncommensurate orders have been established in this paper. The orders become noncommensurate orders when they do not have a common divisor. Sufficient and necessary conditions of stability for this kind of fractional-order LTI system with multiple noncommensurate orders. Base...

This paper provides a solution to the convergence of the parameter estimates to their true values in an ideal adaptive regulation context. The key design feature consists in the use of an asymptotically vanishing internally generated exciting sequence. 1. Introduction IN THIS paper, the following question is addressed: given a known order linear time invariant system, how does one design an ada...

In this paper we analyze the behavior of system approximation processes for stable linear time-invariant (LTI) systems and signals in the Paley–Wiener space PW π . We consider approximation processes, where the input signal is not directly used to generate the system output, but instead a sequence of numbers is used that is generated from the input signal by measurement functionals. We consider...