The paper deals with a new procedure for robust output feedback controller design providing affine quadratic stability. The developed procedure leads to a noniterative LMI based algorithm. The proposed affine robust c...
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The paper deals with a new procedure for robust output feedback controller design providing affine quadratic stability. The developed procedure leads to a noniterative LMI based algorithm. The proposed affine robust controller applied to a plant consisting of two co-operating DC servomotors was evaluated using affine quadratic and quadratic stability test.
The paper addresses the design of a robust output feedback controller for SISO systems using extremal transfer functions and the classical control theory approach. It focuses on robust stabilization of uncertain plant...
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The paper addresses the design of a robust output feedback controller for SISO systems using extremal transfer functions and the classical control theory approach. It focuses on robust stabilization of uncertain plants, which belong to linear or multilinear uncertain systems. A survey on extremal transfer functions is given and it is shown that for the proposed robust controller design procedure the classical linear control theory can be applied providing necessary and sufficient or sufficient stability conditions.
Disturbance rejection performance is usually the most important aspect in designing controller in the process and the chemical industries. On the other hand, such tuned control loop may exhibit large overshoots on ref...
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Disturbance rejection performance is usually the most important aspect in designing controller in the process and the chemical industries. On the other hand, such tuned control loop may exhibit large overshoots on reference tracking. The only way to decrease overshoot is to use two-degrees-of-freedom (2-DOF) controllers. Unfortunately, reducing the overshoot usually results in slower tracking response when using some of the most common 2-DOF controller structures. This paper suggests using additional first-order filter on the set-point of the PI controller in order to improve tracking performance. The calculation of compensator's parameters is straightforward and can be easily performed in practice. Several examples confirmed the efficiency of the proposed approach.
In this paper a predictive control designed for the non-linear plant is discussed. The fuzzy-neuro internal model control (FNIMC) and predictive control based on the dynamic matrix control (DMC) algorithm are compared...
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In this paper a predictive control designed for the non-linear plant is discussed. The fuzzy-neuro internal model control (FNIMC) and predictive control based on the dynamic matrix control (DMC) algorithm are compared and designed. The proposed DMC and FNIMC used to the control the non-linear process.
New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastr...
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New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastructure is needed that exploits these new emerging software technologies. An essential activity to be pursued is that of education and of including new technology in control education. The aim of this paper is to describe some of our activities and experiences in teaching of information techniques and technologies included in open control platforms of complex control systems.
作者：
Branislav HrúzLeo MrafkoSlovak University of Technology
Faculty of Electrical Engineering and Information Technology Department of Automatic Control Systems Ilkovičova 3 812 19 Bratislava Slovak Republic Phone: +421 2 60291698
An analysis of the transportation systems used in the flexible manufacturing systems is introduced in the paper. Based on the analysis a class of the transportation systems is delimited, whose modeling and control is ...
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An analysis of the transportation systems used in the flexible manufacturing systems is introduced in the paper. Based on the analysis a class of the transportation systems is delimited, whose modeling and control is the subject of the paper. Important property of those systems is unidirectional zone movements of the automatic guided vehicles and transport requirements occurring spontaneously during the work of the system. A special group of the colored Petri nets interpreted for control is used for the control specification. The Petri net helps to analyze the function of the transportation system and to write the control program.
X-ray like volume rendering is adapted to time-varying data visualization. The proposed method can be interpreted as an object-order version of differential volume rendering. Time steps are encoded as a sequence of di...
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X-ray like volume rendering is adapted to time-varying data visualization. The proposed method can be interpreted as an object-order version of differential volume rendering. Time steps are encoded as a sequence of differential volumes which are then directly projected onto the image plane to calculate differential images between consecutive frames. The projection of differential volumes is performed by using the splatting method. Due to the simplified visualization model and the object-order approach, those pixels which are affected by the changed voxels can be directly refreshed, without resampling the volume by ray casting. However, compositing is limited to intensity integration. In order to improve spatial impression, differential splatting is extended to depth cueing and hemispherical shading.
Discrete event systems (DES) describe the behavior of a plant as it evolves over time in accordance with the abrupt and asynchronous occurrence of events. Such systems are encountered in a variety of fields, for examp...
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Discrete event systems (DES) describe the behavior of a plant as it evolves over time in accordance with the abrupt and asynchronous occurrence of events. Such systems are encountered in a variety of fields, for example sensor or actuator faults diagnosis, robotics, computers, communication networks and traffic. The control objectives of the supervisory control of DES are to prevent a set of forbidden states from being reach, to preserve the reachability of some non forbidden states, while at the same time enabling a maximal set of achievable state sequences. The aim of this paper is to introduce several approaches for the supervisors synthesis, a Matlab tool SUPCON and an on line multimedia Petri nets and DES course.
controller design approach is described, which is based on genetic algorithms. The approach uses an optimisation procedure, where the cost function to be minimised consists of the closed-loop system simulation and a p...
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controller design approach is described, which is based on genetic algorithms. The approach uses an optimisation procedure, where the cost function to be minimised consists of the closed-loop system simulation and a performance index evaluation. The designed system may be complex and practically without any limitations on its type, structure and size. The proposed approach is demonstrated on a robust controller design example
An adaptive fuzzy controller is designed using a collection of fuzzy IF-THEN rules. Parameters of membership functions characterizing the linguistic terms in the fuzzy IF-THEN rules are changing according to some adap...
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An adaptive fuzzy controller is designed using a collection of fuzzy IF-THEN rules. Parameters of membership functions characterizing the linguistic terms in the fuzzy IF-THEN rules are changing according to some adaptive laws, to control a plant to track a reference trajectory. In this paper, an indirect adaptive fuzzy control design method is developed for general higher order nonlinear continuous systems. The Takagi-Sugeno type fuzzy logic system has been used to approximate the controller. It has been proved that the closed-loop system under this adaptive fuzzy controller is globally stable in the sense that all signals involved are bounded. Finally, the indirect adaptive fuzzy controll method has been applied to control an unstable system
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