2020 (vol. 30) - Number 4

*A.B. Malinowska, R. Kamocki, R. Almeida, T. Odzijewicz:*

On the existence of optimal consensus control for the fractional Cucker--Smale model

*R. Grymin, W. Bożejko, J. Pempera, M. Wodecki, Z. Chaczko:*

Algorithm for solving the Discrete-Continuous Inspection Problem

*T. Kaczorek, A. Ruszewski:*

Global stability of discrete-time nonlinear systems with descriptor standard and fractional positive linear parts and scalar feedbacks

*R. Arora, K. Gupta:*

Fuzzy goal programming technique for multi-objective indefinite quadratic bilevel programming problem

*P. Nowak, J. Czeczot, P. Grelewicz:*

Tuning rules for industrial use of the second-order Reduced Active Disturbance Rejection Controller

*M.I. Gomoyunov:*

Optimal control problems with a fixed terminal time in linear fractional-order systems

*Muhafzan, A. Nazra, L. Yulianti, Zulakmal, R. Revina:*

On LQ optimization problem subject to fractional order irregular singular systems

*M. Blizorukova, V. Maksimov:*

On one algorithm for reconstruction of an disturbance in a linear system of ordinary differential equations

ACS Abstract:

**2010 (Volume 20)**

Number 1

**State estimate based control design using the unified algebraic approach**

A. Filasova(Department of Cybernetics and Artificial Intelligence, Technical University of Kosice, Slovak Republic) | D. Krokavec(Department of Cybernetics and Artificial Intelligence, Technical University of Kosice, Slovak Republic) |

**keywords:** state feedback, linear estimation, linear matrix inequalities, constrains

**Nonlinear response of a harmonically driven oscillator in magnetic field**

P. Przybyłowicz(nstitute of Construction Machinery Engineering, Warsaw University of Technology, Poland) | T. Szmidt(nstitute of Construction Machinery Engineering, Warsaw University of Technology, Poland) |

**keywords:** nonlinear vibrations, oscillator, chaos, stability, magnetic damping

**Robust output predictive sequential controller design**

V. Vesely(Faculty of Electrical Engineering and IT, URPI, Slovak University of Technology, Bratislava, Slovak Republic) | D. Rosinova(Faculty of Electrical Engineering and IT, URPI, Slovak University of Technology, Bratislava, Slovak Republic) |

**keywords:** model predictive control, robust control, parameter dependent quadratic stability, Lyapunov function, polytopic system, sequential approach

**Evaluation of the Shunt Active Power Filter apparent power ratio using particle swarm optimization**

A. Kouzou(Electrical Department, University Centre of Djelfa, Algeria) | M.O. Mahmoudi(LCP, National Polytechnic School, Algiers, Algeria) | M.S. Boucherit(LCP, National Polytechnic School, Algiers, Algeria) |

**keywords:** effective apparent power, shunt active power filter, particle swarm optimization, harmonics, unbalanced voltages, unbalanced load

**The influence of the piezoelements placement on the active vibration damping of smart truss**

Z. Gosiewski(Faculty of Mechanical Engineering, Department of Automatics and Robotics, Technical University of Białystok, Poland) | A.P. Koszewnik(Faculty of Mechanical Engineering, Department of Automatics and Robotics, Technical University of Białystok, Poland) |

Vibrations control in truss structures reaches a great practical interest, mainly in modern structures of huge space vehicles and aircrafts. Two demands essences are required in design of such structures. The first is the excellent dynamic behavior, in order to guarantee the stability of the structure and high precision pointing. The second is the necessity to obtain light structures, in order to reduce the cost. However, these two requirements are often contradictory, because light structures have low degrees of internal damping, which hinders the accuracy requirements.

These difficulties can be overcome by applying recently developed advanced materials, as for instance piezoelectric materials. Several researchers have proved that piezoelectric material can effectively counteract the vibrations. Appropriate assurance active damping of these vibrations can be achieved by optimal location of the piezo elements in the structure.

**keywords:** vibrations, piezo-stack actuator, active truss, modal mass, modal stiffness

**Lyapunov functional for a linear system with two delays both retarded and neutral type**

J.Duda(Institute of Automatic Control, AGH University of Science and Technology, Krakow, Poland) |

**keywords:** Lyapunov functional, time delay system, neutral system, LTI system

**Suppression of vibration with optimal actuators and sensors placement**

L. Starek, D. Starek, P. Solek(Institute of Applied Mechanics and Mechatronics, Slovak University of Technology, Bratislava, Slovak Rep.) | A. Starekova(Institute of Mathematics, Slovak University of Technology, Bratislava, Slovak Rep.) |

**keywords:** optimal location, vibration suppression, actuator, sensor

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