Irreducibility conditions for discrete-time nonlinear multi-input multi-output systems

JOURNAL ARTICLE published September 2004 in IFAC Proceedings Volumes

Authors: Ülle Kotta | Maris Tõnso

Minimal Realizations of Nonlinear Time-Delay Systems

JOURNAL ARTICLE published November 2023 in IEEE Transactions on Automatic Control

Research funded by Politechnika Bialostocka (WZ/WI-IIT/1/2020)

Authors: Arvo Kaldmäe | Zbigniew Bartosiewicz | Ülle Kotta | Malgorzata Wyrwas

Algebraic formalism of differential one-forms for nonlinear control systems on time scales; 264-282

JOURNAL ARTICLE published 2007 in Proceedings of the Estonian Academy of Sciences. Physics. Mathematics

Authors: Z Bartosiewicz | Ü Kotta | E Pawłuszewicz | M Wyrwas

State-space realization of input-output nonlinear difference equations

PROCEEDINGS ARTICLE published July 1997 in 1997 European Control Conference (ECC)

Authors: U. Kotta | P. Liu | A.S.I. Zinober

Reducibility and reduction of discrete-time nonlinear control systems: comparison of two approaches

PROCEEDINGS ARTICLE published in 2003 IEEE International Workshop on Workload Characterization (IEEE Cat. No.03EX775)

Authors: U. Kotta | E. Pawluszewicz | S. Nomm

Realization of discrete-time nonlinear input–output equations: Polynomial approach

JOURNAL ARTICLE published February 2012 in Automatica

Research funded by Haridus- ja Teadusministeerium (SF0140018s08) | European Social Fund (8787)

Authors: Ülle Kotta | Maris Tõnso

Stability, stabilization and observers of linear control systems on time scales

PROCEEDINGS ARTICLE published 2007 in 2007 46th IEEE Conference on Decision and Control

Authors: Zbigniew Bartosiewicz | Ewa Piotrowska | Malgorzata Wyrwas

Realization of Continuous–Time Nonlinear Input–Output Equations: Polynomial Approach

BOOK CHAPTER published 2009 in Computer Aided Systems Theory - EUROCAST 2009

Authors: Maris Tõnso | Ülle Kotta

Weak reachability and controllability of discrete-time nonlinear systems: generic approach and singular points

JOURNAL ARTICLE published 3 March 2020 in International Journal of Control

Research funded by Eesti Teadusagentuur (Estonian Research Council grant PUT 481) | Politechnika Bialostocka (S/WI/1/2016,S/WM/1/2016)

Authors: T. Mullari | Ü. Kotta | Z. Bartosiewicz | M. A. Sarafrazi | C. H. Moog | E. Pawluszewicz

Equivalence to a (Strict) Feedforward Form of Nonlinear Discrete-Time Single-Input Control Systems

PROCEEDINGS ARTICLE published in Proceedings of the 44th IEEE Conference on Decision and Control

Authors: C.H. Moog | U. Kotta

Equivalence of discrete-time nonlinear systems to prime systems under proper generalized output transformations

PROCEEDINGS ARTICLE published July 1997 in 1997 European Control Conference (ECC)

Authors: E. Aranda-Bricaire | U. Kotta

Positive realizations of nonlinear input–output discrete-time systems

JOURNAL ARTICLE published May 2018 in Systems & Control Letters

Research funded by National Science Centre (2013/09/B/ST7/04216)

Authors: Zbigniew Bartosiewicz

Realizations in feedforward forms of nonlinear input‐output equations with time‐delays

JOURNAL ARTICLE published 25 November 2020 in International Journal of Robust and Nonlinear Control

Research funded by European Regional Development Fund (EXCITE)

Authors: Arvo Kaldmäe | Yu Kawano | Ülle Kotta

Dynamic output linearization of nonlinear discrete-time control systems

PROCEEDINGS ARTICLE published 1996 in UKACC International Conference on Control. Control '96

Authors: E. Pawluszewicz

External dynamical equivalence of time-varying nonlinear control systems on time scales

JOURNAL ARTICLE published May 2011 in International Journal of Control

Authors: Z. Bartosiewicz | E. Pawłuszewicz

State-space realization of nonlinear input-output equations: Unification and extension via pseudo-linear algebra

PROCEEDINGS ARTICLE published December 2011 in 2011 9th IEEE International Conference on Control and Automation (ICCA)

Authors: U. Kotta | P. Kotta | M. Tonso | M. Halas

Irreducibility and reduction of nonlinear control systems: Unification and extension via pseudo-linear algebra

PROCEEDINGS ARTICLE published December 2008 in 2008 10th International Conference on Control, Automation, Robotics and Vision

Authors: U. Kotta | P. Kotta | M. Halas

On classical state space realisability of quadratic input–output differential equations

JOURNAL ARTICLE published July 2009 in International Journal of Control

Authors: Ü. Kotta | P. Kotta | M. Tõnso | A.S.I. Zinober

Observable space of the nonlinear control system on a homogeneous time scale

JOURNAL ARTICLE published 2014 in Proceedings of the Estonian Academy of Sciences

Authors: V Kaparin | Ü Kotta | M Wyrwas

Realizability of bilinear input/output difference equations: corrections and extensions

PROCEEDINGS ARTICLE published 2010 in UKACC International Conference on CONTROL 2010

Authors: J. Belikov | P. Kotta | U. Kotta