Model reference adaptive control (MRAC) has been developed in many modifications. The stability proofs have been given under the assumption that the plant model is linear. However, MRAC approaches give often convergen...
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Model reference adaptive control (MRAC) has been developed in many modifications. The stability proofs have been given under the assumption that the plant model is linear. However, MRAC approaches give often convergent solutions even for nonlinear systems. The aim of this paper is to show that for nonlinear systems with the model in canonical form, the standard MRAC with state feedback structure can be used to obtain the perfect model matching. The stability proof is derived using the general Laypunov stability theory. At the end of paper, an example of adaptive control of third order nonlinear system is presented, where a considerable improvement of control system dynamical behavior has been obtained.
Model reduction has significant importance in Large-Scale systems. In this paper one of the main classes of model reduction-aggregation is used and the results of the two different methods are discused and compared fo...
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Model reduction has significant importance in Large-Scale systems. In this paper one of the main classes of model reduction-aggregation is used and the results of the two different methods are discused and compared for application in Power systems.
This research is concerned with fault detection of nonlinear systems using Kullback discrimination information (KDI) as an index. A hybrid quasi-ARMAX model is proposed, which combines a linear ARMAX model and a multi...
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This research is concerned with fault detection of nonlinear systems using Kullback discrimination information (KDI) as an index. A hybrid quasi-ARMAX model is proposed, which combines a linear ARMAX model and a multi-ARX-model based on interpolation. In the case where the faults occur on the ARMAX model part, a KDI-based "robust" fault detection is performed, in which multi-ARX-model part is treated as error due to nonlinear undermodeling. In other cases, the model is transformed into several local ARMAX models and fault detection is performed by using the KDI to discriminate each identified local model. In this paper, we mainly concentrate our discussion on the latter cases.
The paper addresses the problem of design of robust decentralized controllers with output feedback for interconnected linear systems with uncertainties. A new class of robust continuous-time and discrete-time controll...
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The paper addresses the problem of design of robust decentralized controllers with output feedback for interconnected linear systems with uncertainties. A new class of robust continuous-time and discrete-time controllers is proposed to guarantee exponential stability of uncertain linear systems without matching conditions. The uncertainties possibly nonlinear can appear both in the subsystems and in the interconnections between them. The proposed algorithm is applied to 6th order system model comprising two subsystems with decentralized controller.
In this paper is presented a new approach to robust non-linear control design, which can guarantee a prescribed decay rate of exponential stability for known system uncertainties. The proposed approach doesn’t employ...
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In this paper is presented a new approach to robust non-linear control design, which can guarantee a prescribed decay rate of exponential stability for known system uncertainties. The proposed approach doesn’t employ matching conditions. The non-linear power system with deterministic uncertainties is chosen as demonstration example.
作者：
B. HrúzSlovak University of Technology
Faculty of Electrical Engineering and Information Technology Department of Automatic Control Systems Ilkovičova 3 812 19 Bratislava Slovak Republic Phone: +42 7 791698
A certain class of Petri nets interpreted for control, shortly CTRL - Petri nets, are introduced and defined in the paper. Three basic elementary CTRL - Petri net structures are described reflecting three main control...
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A certain class of Petri nets interpreted for control, shortly CTRL - Petri nets, are introduced and defined in the paper. Three basic elementary CTRL - Petri net structures are described reflecting three main control situations with respect to conflict decision problem in the flexible manufacturing systems (FMS). Two main sources of the conflicts in the FMS are analyzed and specified. Then a method for removal of the conflicts in the FMS modelling CTRL - Petri net is presented. The method is illustrated on a practical example.
An educational approach to the modelling and control of the discrete event dynamic systems (DEDS) is treated in the paper. After summarizing importance of the field an outline of the lecture course is presented. The r...
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An educational approach to the modelling and control of the discrete event dynamic systems (DEDS) is treated in the paper. After summarizing importance of the field an outline of the lecture course is presented. The role of the Petri nets for the DEDS as well as for education is emphasized. Three laboratory works supporting the subject education are further described. They are simulated robotic cell controlled by means of the program based on the Petri nets and written in the real-time programming language PEARL, manufacturing line model controlled by the PEARL program based also on the Petri nets and the same model controlled by the ladder logic program.
A practical scheme for on-line automatic tuning the existing industrial PID controllers with the assistance of a neural network is developed. A radial basis function (RBF) network have been used to implement the neura...
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A practical scheme for on-line automatic tuning the existing industrial PID controllers with the assistance of a neural network is developed. A radial basis function (RBF) network have been used to implement the neural network PID auto-tuner. A real-time version of the neural network assisted PID auto-tuner has been implemented on a personal computer (PC). Experimental testings on some generic process models, and comparison with some commercial PID auto-tuners shows favourable result on the performance of the developed scheme.
This paper describes methods based on Petri nets analysis techniques for constructing a supervisory controller of discrete event dynamic systems. Two methods (method based on reachability tree analysis and on-line met...
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This paper describes methods based on Petri nets analysis techniques for constructing a supervisory controller of discrete event dynamic systems. Two methods (method based on reachability tree analysis and on-line method based on matrix equations) have been designed. Programs in C++ have been written to solve supervisory control problem and real time control of a discrete event dynamic system.
This paper presents a robust fault detection system (FDS) for dynamic systems with unmodeled dynamics. In the FDS, umnodeled dynamics is first qualified as soft bound, which as well as model parameters are estimated u...
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This paper presents a robust fault detection system (FDS) for dynamic systems with unmodeled dynamics. In the FDS, umnodeled dynamics is first qualified as soft bound, which as well as model parameters are estimated using a robust identification algorithm. Then as a fault detection index, Kullback discrimination information (KDI) is derived into a feasible form and an index of umnodeled dynamics is also introduced. A decision making scheme is thus developed so that fault detection is carried out based on the KDI, the index of umnodeled dynamics and other prior information about the system.
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