2018 (vol. 28) - Number 4

*T. Kaczorek:*

A new method for computation of positive realizations of fractional linear continuous-time systems

*A. Biswas, A. Sarkar:*

Development of dual hesitant fuzzy prioritized operators based on Einstein operations with their application to multi-criteria group decision making

*L. Li, R. Zhang, J. Wang, X. Shang:*

Some q-orthopair linguistic Heronian mean operators with their application to multi-attribute group decision making

*J. Duda:*

Lyapunov matrices approach to the parametric optimization of a system with two delays and a PD controller

*M. Lhous, M. Rachik, El M. Magri:*

Ideal observability for bilinear discrete-time systems with and without delays in observation

*P.T. Anh, A. Babiarz, A. Czornik, M. Niezabitowski:*

Variation of constant formulas for fractional difference equations

*K. Bingi, R. Ibrahim, M. Noh Karsiti, S. Miya Hassan, V. Rajah Harindran:*

A comparative study of 2DOF PID and 2DOF fractional order PID controllers on a class of unstable systems

ACS Abstract:

**2004 (Volume 14)**

Number 3/4

**An adaptive control scheme for nonholonomic mobile robot with parametric uncertainty**

Faical Mnif(Institut National des Sciences Appliquees et de Technologie, Tunisia) | Farid Touati(Sultan Qaboos University, Oman) |

**keywords:** nonholonomic systems, adaptive control, car-like vehicle.

**Numerical determination of quadratic-optimal regulator for linear systems with constraints**

Jan Cvejn(Technical University of Liberec, Czech Republic) |

**keywords:** quadratic optimal regulators, control of linear systems, optimal control with constraints, criterion functions, optimization problems.

**Model identification for Active Noise Control - a case study**

Jerzy Kasprzyk(Silesian University of Technology, Poland) |

**keywords:** Active Noise Control, process identification, parameter estimation, frequency response, models.

**An alternative algorithm to EAXCT self-tuning**

Zbigniew ¦wider and Leszek Trybus(University of Technology, Rzeszów, Poland) |

**keywords:** self-tuning, PID control, adaptive control.

**On state and output stabilization of discrete delay systems**

Jamila Karrakchou(LERMA, EGT, Ecole Mohammadia d'ing?nieurs, Maroc) | Abedlwahed Namir, Fouad Lahmidi and Boubker Daafi(Faculté des Sciences Ben M'Sik, Maroc) |

This work is organized in three sections. The state stabilization problem is examined in section 2. The three principle notions of stability and stabilizability (uniform, strong and weak) are investigated. Using the state space technique, it is shown that this problem can be tackled considering an equivalent non delayed system. Sufficient and necessary conditions for the stabilization of the new system are then established. Using these results and similar methods, sufficient and necessary conditions for the output stabilization are developed in section 3. To illustrate this work, some examples are given.

**keywords:** Discrete-time system, delay system, stability, state stabilization, output stabilization.

**A quasi-LPV model for gain-scheduling canal control**

Yolanda Bolea, Vicenc Puig, Joaquin Blesa, Manuel Gómez and Jose Rodellar(Technical University of Catalonia, Spain) |

**keywords:** LPV models, LTI models, distributed parameter systems, gain-scheduling control, and environmental systems.

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