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  1. 11 Systems Science
  2. 10 International Journal of Applied Mathematics and Computer Science
  3. 7 Archives of Control Sciences
  4. 3 Biocybernetics and Biomedical Engineering
  5. 2 Archive of Mechanical Engineering
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  1. 2 2021
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  1. 8 Maksimov V.
  2. 3 Leniowska L.
  3. 3 Pawełczyk M.
  4. 2 Bernat J.
  5. 2 Bocheński M.
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1
Content available remote Realizing actual feedback control of complex network
100%
Tu C. , Cheng Y.
Open Physics
|
2014
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tom 12
|
nr 6
406-414
EN
In this paper, we present the concept of feedbackability and how to identify the Minimum Feedbackability Set of an arbitrary complex directed network. Furthermore, we design an estimator and a feedback controller accessing one MFS to realize actual feedback control, i.e. control the system to our desired state according to the estimated system internal state from the output of estimator. Last but not least, we perform numerical simulations of a small linear time-invariant dynamics network and a real simple food network to verify the theoretical results. The framework presented here could make an arbitrary complex directed network realize actual feedback control and deepen our understanding of complex systems.
2
Content available remote Active control of circular plate vibration by using piezoceramic actuators
100%
Leniowska L. , Leniowski R.
Archives of Control Sciences
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2003
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tom Vol. 13, no. 4
445-457
EN
An active vibration control system is proposed for suppressing small amplitude harmonic vibrations of a thin circular plate. This system integrates control algorithms, intelligent materials hardware and software technologies. The mathematical model of the physical system is based upon the geometry and properties of an experimantal set-up consisting of a hard-walled cylinder with a thin aluminium plate at the end. Primary excitation is provided by a low frequency loudspeaker installed centrally at the bottom of the cylinder. The vibrations of the plate are measured by the application of strain sensors. Intelligent materials such as 2-layer piezo disk elements (PZT) are used as the actuator. For the considered system, the OE (Output Error) method of discrete-time model identyfication for real-time active vibration control has been applied. On the basis of this model, the control algorithm based on pole-placement method has been developed. The obtained results show that the designed structure of a closed-loop system provides substantial vibration suppression.
3
Content available remote Multiple-valued logic feedback controllers of dynamical systems
100%
Ossowski A. , Święcicka A.
Prace Instytutu Podstaw Informatyki Polskiej Akademii Nauk
|
2001
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tom Nr 928
66-75
EN
The general problem of discrete feedback control of dynamical systems has been formulated. Multiple-valued logic networks as feedback controllers have been proposed. The possibility of application of ternary neural networks to parametric modification of multidimensional linear dynamical systems has been considered.
4
Content available remote On one algorithm for solving the problem of source function reconstruction
100%
Maksimov V.
International Journal of Applied Mathematics and Computer Science
|
2010
|
tom 20
|
nr 2
239-247
EN
In the paper, the problem of source function reconstruction in a differential equation of the parabolic type is investigated. Using the semigroup representation of trajectories of dynamical systems, we build a finite-step iterative procedure for solving this problem. The algorithm originates from the theory of closed-loop control (the method of extremal shift). At every step of the algorithm, the sum of a quality criterion and a linear penalty term is minimized. This procedure is robust to perturbations in problems data.
5
Content available remote On attaining the prescribed quality of a controlled fourth order system
100%
Kapustyan V. , Maksimov V.
International Journal of Applied Mathematics and Computer Science
|
2014
|
tom 24
|
nr 1
75-85
EN
In this paper, we discuss a method of auxiliary controlled models and its application to solving some robust control problems for a system described by differential equations. As an illustration, a system of nonlinear differential equations of the fourth order is used. A solution algorithm, which is stable with respect to informational noise and computational errors, is presented. The algorithm is based on a combination of online state/input reconstruction and feedback control methods.
6
Content available remote Distributed output feedback control of two-time-scale hyperbolic PDE systems
100%
Christofides P. D. , Daoutidis P.
Applied Mathematics and Computer Science
|
1998
|
tom Vol. 8, no 4
713-732
EN
This article focuses on systems of two-time-scale hyperbolic partial differential equations (PDEs), modeled in singularly perturbed form, for which the manipulated inputs, the controlled and the measured outputs are distributed in space. The objective is to synthesize distributed output feedback controllers that guarantee closed-loop stability and enforce output tracking, provided that the speed ratio of the fast versus the slow dynamical phenomena of the two-time-scale system is sufficiently large. Initially, singular perturbation methods are used to derive two separate PDE models which describe the fast and slow dynamics of the original system. These models are then used as a basis for the synthesis of well-conditioned distributed state feedback controllers that guarantee stability and enforce output tracking in the closed-loop system. Then, two distributed state observers are independently designed on the basis of the fast and slow subsystems, to provide estimates of the fast and slow states of the system. These state observers are coupled with the distributed state feedback controller to yield a distributed output feedback controller that enforces the desired objectives in the closed-loop system. The proposed methodology is applied to a convection-reaction process with time-scale multiplicity.
7
Content available Suboptimal control of nonlinear continuous-time locally positive systems using input-state linearization and SDRE approach
100%
Bernat J. , Kołota J. , Stępień S. , Superczyńska P.
Bulletin of the Polish Academy of Sciences: Technical Sciences
|
2018
|
nr 1
8
Content available On dynamical identification of control in a system with time delay
100%
Maksimov V.
Archives of Control Sciences
|
2012
|
tom Vol. 22, no. 1
5-15
EN
The problem of identification of a control through results of observations of phase states of dynamical systems described by differential equations with time delay is discussed. The paper presents an algorithm based on the method of feedback control with a model. The algorithm is stable with respect to informational noises and computational errors.
9
Development of Active Vibration Control System for Circular Plate by Using the 2-Layer Piezo Disk Elements
100%
Leniowska L. , Leniowski R.
Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica
|
2003
|
tom T. 22, z. 3
337-346
EN
An active vibration control system is proposed for suppressing small amplitude harmonic vibrations of a thin circular plate. This system integrates control algorithms, intelligent materials, hardware and software technologies. The mathematical model of the physical system is based upon the geometry and properties of an experimental set-up consisting of a hard-walled cylinder with a thin aluminium plate at one end. Primary excitation is provided by a Iow frequency loudspeaker installed centrally at the bottom of the cylinder. The vibrations of the plate are measured by the application of strain sensors. Intelligent materials such as 2-layer piezo disk elements (PZT) are used as the actuator. For the considered system, the OE (Output Error) method of discrete-time model identification for real-time active vibration control has been applied. On the basis of this model, the control algorithm based on pole-placement method has been developed. The simulation results show that the designed structure of a close-loop system provifeedback contrdes substantial vibration suppression.
10
Content available On suppression of chaotic motions of a portal frame structure under non-ideal loading using a magneto-rheological damper
100%
Tusset A. M. , Piccirillo V. , Balthazar J. M. , Brasil R. M. L. R. F.
Journal of Theoretical and Applied Mechanics
|
2015
|
tom Vol. 53 nr 3
653--664
EN
We consider chaotic motions of a portal frame structure under non-ideal loading. To suppress this chaotic behavior, a controlling scheme is implemented. The control strategy involves application of two control signals and nonlinear feedforward control to maintain a desired periodic orbit, and state feedback control to bring the system trajectory into the desired periodic orbit. Additionally, the control strategy includes an active magneto-rheological damper to actuate the system. The control force of the damper is a function of the voltage applied in the coil of the damper that is based on the force given by the controller.
11
Content available remote Robust identification of parasitic feedback disturbances for linear lumped parameter systems
100%
Maksimov V. , Pandolfi L.
International Journal of Applied Mathematics and Computer Science
|
2001
|
tom 11
|
nr 4
835-858
EN
We study the problem of identification of an input to a linear finite-dimensional system. We assume that the input has a feedback form, which is related to a problem often encountered in fault detection. The method we use is to embed the identification problem in a class of inverse problems of dynamics for controlled systems. Two algorithms for identification of a feedback matrix based on the method of feedback control with a model are constructed. These algorithms are stable with respect to noise-corrupted observations and computational errors.
12
Content available A stabilization method of inhomogeneous ladder networks with nonlinear elements
100%
Skruch P.
Archives of Control Sciences
|
2011
|
tom Vol. 21, no. 3
313-329
EN
In the paper, different structures of electric ladder networks are considered: RC, RL, and RLC. Such systems are composed of resistors, inductors and capacitors connected in series. The elements of the network are not identical and have nonlinear characteristics. The network's dynamic behavior can be mathematically described by nonlinear differential equations. A class of robust feedback controls is designed to stabilize the system. The asymptotic stability of the closed-loop system is analyzed and proved by the use of Lyapunov functionals and LaSalle's invariance principle. The results of computer simulations are included to verify theoretical analysis and mathematical formulation.
13
Content available remote Pole assignment by feedback control of the second order coupled singular distributed parameter systems
88%
Ge Z.
Control and Cybernetics
|
2004
|
tom Vol. 33, no 4
551-562
EN
Pole assignment by feedback control of the second order coupled singular distributed parameter systems is discussed via functional analysis and operator theory in Hilbert space. The solutions of the problem and the constructive expression of the solutions are given by the generalized inverse one of bounded linear operator. This research is theoretically important for studying the stabilization and asymptotical stability of tlie second order coupled singular distributed parameter systems.
14
Content available Experimental characterization of hybrid noise control systeme acting in acoustic duct
88%
Tiseo B. , Concilio A. , Ameduri S. , Gianvito A.
Journal of Theoretical and Applied Mechanics
|
2011
|
tom Vol. 49 nr 2
313-326
EN
In this investigation, a sound absorbing material is coupled with an active surface to reduce sound pressure within an acoustic duct. In this way, an enhancement of the passive foam performance can be observed because of further acceleration of the fluid particles within the foam pores. The experimental activity implements noise control strategies to increase damping within the cavity through acoustic foam with a flexible backing plate, acted by piezoelectric actuators.
PL
W pracy zbadano skuteczność zastosowania materiału absorbującego dźwięk współpracującego z aktywną powierzchnią przeznaczoną do redukcji ciśnienia akustycznego w dukcie. Zaobserwowano, że takie skojarzenie znacznie poprawia pasywne właściwości samej dźwiękochłonnej pianki wskutek zwiększenia przyspieszeń cząstek płynu zawartego w porach pianki.Wwyniku badań doświadczalnych uzyskano strategie kontroli hałasu zwiększające tłumienie poprzez użycie akustycznej pianki na elastycznej płycie domykającej dukt i sterowanej elementami piezoelektrycznymi.
15
Content available remote Feedback control of nonholonomic wheeled vehicles. A survey
88%
Pascal M. , Samson C.
Archives of Control Sciences
|
2002
|
tom Vol. 12, no. 1/2
7-36
EN
The paper is an introduction and overview to the problem of feedback control of nonholomic wheeled vehicles. Solutions proposed during the last decade and a new approach currently developed by the authors of this article are presented.
16
Content available An Adaptive Control Strategy for a Low-Ripple Boost Converter in BLDC Motor Speed Control
88%
Wang H. , Zhang H.
Power Electronics and Drives
|
2021
|
tom Vol. 6 (41)
242--259
EN
Conventional boost converters are widely used for connecting low-voltage power sources and inverters in motor control. However, a large filter capacitor bank is often used to reduce DC-link ripples that occur when an inverter is connected to a boost converter. Otherwise, significant voltage and current perturbations can impact on battery performance degradation and cause torque ripple, speed ripple and vibration in brushless DC (BLDC) motors. To suppress the converter’s DC-link ripple, this paper proposes a new control strategy for boost converter controller to generate low-ripple DC-link voltage or current at different motor speeds. In the proposed method, observers are designed to adaptively estimate the DC-link voltage and current harmonics. The harmonic terms are used as feedback signals to calculate the DC converter’s duty cycle. The entire control model is implemented on an embedded system, and its robustness is verified by simulation and experimental results that show the DC-link voltage and current ripples can be reduced by about 50% and 30%, respectively.
17
Input Shaping and Feedback Control of a Single-Link Flexible Manipulator
88%
Tokhi O. M. , Mohamed Z.
Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica
|
2003
|
tom T. 22, z. 3
447-454
EN
This paper presents investigations into the development of hybrid control schemes for input tracking and end-point vibration suppression of a single-link flexible manipulator system. A collocated proportional--derivative (PD) control scheme using hub angle and hub velocity feedback is initially developed for control of rigid body motion of the system. This is then extended to incorporate a noncollocated proportional-integral-derivative (PID) controller and input shaping techniques for control of vibration of the system. Simulation results of the response of the manipulator with the controllers are presented in time and frequency domains. The performances of the control schemes are assessed in terms of input tracking and level of vibration reduction in comparison to the PD control scheme.
18
Content available Feedback control of three-Level PWM rectifier: Application to the stabilization of DC Voltages of five-level NPC active power filter
88%
Abdelkrim T. , Berkouk E. M. , Benslimane T. , Benamrane K.
Archives of Control Sciences
|
2010
|
tom Vol. 20, no. 3
317-339
EN
One of the most important drawbacks of the three phases five-level NPC (Neutral Point Clamped) Active Power Filter (APF) is the neutral point balance. As the consequence, the capacitors voltages of the input DC bus of the APF are not equal which constitutes the major limitation for the use of this power converter. In order to stabilize these DC voltages, it is proposed in this paper to study the cascade constituted by three phases three-level PWM rectifier-clamping bridge filter-five-level NPC APF. In the first part, the authors present a topology of five-level NPC Voltage Source Inverter (VSI), and then, they propose a model of this converter and its PWM control strategy. In the second part, the modeling and control of three-level PWM current rectifier is presented. In the third part, to remedy to instability problem of the input capacitors DC voltages of the APF, the authors propose feedback control of the three-level PWM rectifier followed by clamping bridge filter. After that, the sliding mode regulator used to control the active filter is developed. The obtained results are full of promise to use this topology of APF in high voltage and high power applications.
19
Content available remote Motion planning and feedback control for a unicycle in a way point following task: The VFO approach
88%
Michałek M. , Kozłowski K.
International Journal of Applied Mathematics and Computer Science
|
2009
|
tom 19
|
nr 4
533-545
EN
This paper is devoted to the way point following motion task of a unicycle where the motion planning and the closed-loop motion realization stage are considered. The way point following task is determined by the user-defined sequence of waypoints which have to be passed by the unicycle with the assumed finite precision. This sequence will take the vehicle from the initial state to the target state in finite time. The motion planning strategy proposed in the paper does not involve any interpolation of way-points leading to simplified task description and its subsequent realization. The motion planning as well as the motion realization stage are based on the Vector-Field-Orientation (VFO) approach applied here to a new task. The unique features of the resultant VFO control system, namely, predictable vehicle transients, fast error convergence, vehicle directing effect together with very simple controller parametric synthesis, may prove to be useful in practically motivated motion tasks.
20
Content available remote Robust Identification of Parasitic Feedback Disturbances for Linear Lumped Parameter Systems
88%
Maksimov V. , Pandolfi L.
International Journal of Applied Mathematics and Computer Science
|
2001
|
tom Vol. 11, no 4
835-858
EN
We study the problem of identification of an input to a linear finite-dimensional system. We assume that the input has a feedback form, which is related to a problem often encountered in fault detection. The method we use is to embed the identification problem in a class of inverse problems of dynamics for controlled systems. Two algorithms for identification of a feedback matrix based on the method of feedback control with a model are constructed. These algorithms are stable with respect to noise-corrupted observations and computational errors.
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