2021 (vol. 31) - Number 3

*Vanya R. Barseghyan:*

The problem of control of rod heating process with nonseparated conditions at intermediate moments of time

*Khadidja Bentata , Ahmed Mohammedi, Tarak Benslimane:*

Development of rapid and reliable cuckoo search algorithm for global maximum power point tracking of solar PV systems in partial shading condition

*Jakub Musial, Krzysztof Stebel and Jacek Czeczot:*

Self-improving Q-learning based controller for a class of dynamical processes

*Ramesh Devarapalli and Vikash Kumar:*

Power system oscillation damping controller design: a novel approach of integrated HHO-PSO algorithm

*T. Kaczorek:*

Poles and zeros assignment by state feedbacks in positive linear systems

*Saule Sh. Kazhikenova and Sagyndyk N. Shaltakov, Bekbolat R. Nussupbekov:*

Difference melt model

*R. Almeida and N. Martins, E. Girejko and A.B. Malinowska, L. Machado:*

Evacuation by leader-follower model with bounded confidence and predictive mechanisms

*B. Zhao and R. Zhang, Y. Xing:*

Evaluation of medical service quality based on a novel multi-criteria decision-making method with unknown weighted information

*Stefan Mititelu, Savin Treanta:*

Efficiency in vector ratio variational control problems involving geodesic quasiinvex multiple integral functionals

*D.K. Dash and P.K. Sadhu, B. Subudhi:*

Spider monkey optimization (SMO) – lattice Levenberg–Marquardt recursive least squares based grid synchronization control scheme for a three-phase PV system

*Suresh Rasappan and K.A. Niranjan Kumar:*

Dynamics, control, stability, diffusion and synchronization of modified chaotic colpitts oscillator

ACS Abstract:

**2003 (Volume 13)**

Number 4

**Robot controller with a self-measurement capability enabling the identification of friction**

Adam Wozniak, Wojciech Szynkiewicz and Cezary Zielinski(Warsaw University of Technology, Poland) |

**keywords:** robot controller, servomechanism, friction model, identification.

**The interval parabolic system**

Krzysztof Oprzedkiewicz(University of Mining and Metallurgy, Poland) |

**keywords:** interval systems, parabolic systems,the exponential stability.

**On controllability and minimum energy control of linear positive systems with delays**

Beata Sikora(Silesian University of Technology, Poland) |

**keywords:** positive dynamical systems, delay systems, relative controllability, admissible control, minimum energy control.

**Active control of circular plate vibration by using piezoceramic actuators**

Lucyna Leniowska and Ryszard Leniowski(University of Rzesz?w, Poland) |

**keywords:** active vibration control, feedback control, piezoceramic transducers, identification methods.

**Multivariable robust control applied to steering of three ship's velocities**

Witold Gierusz(Gdynia Maritime University, Poland) |

**keywords:** training ship, simulation model, multivariable system, robust control, real-time steering.

**Hierarchical control in a large scale stochastic system with nonclassical information structure**

Zdzislaw Duda and Witold Brandys(Silesian University of Technology, Poland) |

**keywords:** large scale system, stochastic system, decentralized control, optimal control.

**Errors of elementary floating-point operations in control algorithms**

Zbigniew Swider(Technical University of Rzeszow, Poland) |

*b*denotes the number of mantissa bits. Error of Euler rectangular integrator , commonly used in digital controllers, is evaluated as well. For small sampling step the error depends primarily on precision of the addition executed by the integrator. Increase of the precision used in some small controllers is also considered. The results are verified for first-order transfer function subject to white noise, sinusoidal and constant-plus-noise inputs.

**keywords:** floating-point arithmetic, roundoff errors, delta-operator, stochastic systems.

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