نتایج جستجو برای: theoretical descriptor

تعداد نتایج: 305774  

Journal: :iranian journal of mathematical chemistry 2010
p. e. john s. aziz p. v. khadikar

structural codes vis-a-vis structural counts, like polynomials of a molecular graph, areimportant in computing graph-theoretical descriptors which are commonly known astopological indices. these indices are most important for characterizing carbon nanotubes(cnts). in this paper we have computed sadhana index (sd) for phenylenes and theirhexagonal squeezes using structural codes (counts). sadhan...

2014
Wudhichai Assawinchaichote

The problem of filter design for descriptor systems system has been intensively studied by a number of researchers for the past three decades; see Ref.[1]-[6]. This is due not only to theoretical interest but also to the relevance of this topic in control engineering applications. Descriptor systems or so called singularly perturbed systems are dynamical systems with multiple time-scales. Descr...

2012
Wudhichai Assawinchaichote

The problem of filter design for descriptor systems system has been intensively studied by a number of researchers for the past three decades; see Ref.[1]-[6]. This is due not only to theoretical interest but also to the relevance of this topic in control engineering applications. Descriptor systems or so called singularly perturbed systems are dynamical systems with multiple time-scales. Descr...

Journal: :Int. J. Control 2016
Christina Kazantzidou Lorenzo Ntogramatzidis

In this paper, we investigate several theoretical and computational aspects of fundamental subspaces for linear, time-invariant (LTI) descriptor systems, which appear in the solution of many control and estimation problems. Different types of reachability and controllability for descriptor systems are described and discussed. The Rosenbrock system matrix pencil is employed for the computation o...

2014
Jonathan Masci Davide Migliore Michael M. Bronstein Jürgen Schmidhuber

Feature matching in omnidirectional vision systems is a challenging problem, mainly because complicated optical systems make the theoretical modelling of invariance and construction of invariant feature descriptors hard or even impossible. In this paper, we propose learning invariant descriptors using a training set of similar and dissimilar descriptor pairs. We use the similarity-preserving ha...

2016

The structure uncertain non-linear descriptor systems have been considered. A controller feedback and open loop stabilization of non-linear perturbed descriptor system have been developed using Lyapunov function approach and finite time stability principle. The theoretical justifications with the necessary requirements and illustration have also been presented.

Journal: :IEEE Trans. Automat. Contr. 2012
Peter Benner Vasile Sima Matthias Voigt

In this technical note, we discuss an algorithm for the computation of the L∞-norm of transfer functions related to descriptor systems. We show how one can achieve this goal by computing the eigenvalues of certain skew-Hamiltonian/Hamiltonian matrix pencils and analyze arising problems. We also formulate and prove a theoretical result which serves as a basis for testing a transfer function matr...

Journal: :SIAM J. Scientific Computing 2013
Serkan Gugercin Tatjana Stykel Sarah Wyatt

In this paper, we investigate interpolatory projection framework for model reduction of descriptor systems. With a simple numerical example, we first illustrate that employing subspace conditions from the standard state space settings to descriptor systems generically leads to unbounded H2 or H∞ errors due to the mismatch of the polynomial parts of the full and reducedorder transfer functions. ...

2007
Xin XIN Shinji HARA Masahiro KANEDA

In this paper, we present a new approach to investigate the existence and design of reduced-order proper H∞ controllers that provide the same level of performance as that of full-order controllers. By examining some special features of the LMI-based solvability conditions for the H∞ control problem for descriptor systems, we obtain a refined bound on the order of H∞ controllers, which is indepe...

2007
Xin Xin Shinji Hara Masahiro Kaneda

In this paper, we present a new approach to investigate the existence and design of reduced-order proper H∞ controllers that provide the same level of performance as that of full-order controllers. By revealing some special features of the LMI-based solvability conditions for the H∞ control problem for descriptor systems, we obtain a refined bound on the order of H∞ controllers, which is indepe...

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