This paper presents a simulation tool to test concepts related to Distributed Artificial Intelligence (DAI), multi agent systems (MAS) and agent oriented programming (AOP), such as cooperation and coordination within ...
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Conical tanks are widely used in food process industries, hydrometallurgical industries and also in the water treatment industry. Moreover, liquid level control of a conical tank is still challenging for typical proce...
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ISBN:
(纸本)9783902661555
Conical tanks are widely used in food process industries, hydrometallurgical industries and also in the water treatment industry. Moreover, liquid level control of a conical tank is still challenging for typical process control because of occurred nonlinearities. This paper presents comparison between Adaptive and Non-Adaptive version of popular predictive Dynamic Matrix control.
Block diagrams are a popular tool for representing relationships in complex systems and became a kind of universal language, comprehended widely in engineering sciences dealing with dynamical systems. There are many s...
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ISBN:
(纸本)9783902661555
Block diagrams are a popular tool for representing relationships in complex systems and became a kind of universal language, comprehended widely in engineering sciences dealing with dynamical systems. There are many software development environments (e.g. Simulink, LabVIEW, VisSIM) accepting such block diagrams as a programming language. However, block diagrams are rarely used in the field of systems visualisation dominated by custom made process flow diagrams. This paper presents a concept of using block diagrams as a tool for run-time presentation of a time-variant structure of complex control systems. At first, formal description of block diagrams is derived as an ontology, class hierarchy, and XML Schema. In the second part of the paper developed software tools are presented i.e. equation parser, Web Service implemented in a dynamic agent-based control system, and an AJAX-based application visualising acquired models as live interactive vector diagrams. Existing solutions for automated diagram spatial arrangement are not proper for block diagrams containing feedback loops, therefore presented visualisation tool, to achieve comprehendible and aesthetical layout, implements modified approach, which is thoroughly discussed.
There are few examples of process benchmarking in the literature nowadays which allow to determine quality of tested control algorithms unequivocally. It is believed that exothermic CSTR process (with Arrhenius-type r...
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ISBN:
(纸本)9783902661555
There are few examples of process benchmarking in the literature nowadays which allow to determine quality of tested control algorithms unequivocally. It is believed that exothermic CSTR process (with Arrhenius-type reaction), CSTB process (with Monod-type or Contoise-type reaction) and pH process fulfill such a function. However, most commonly used settings for CSTR and CSTB processes display nonlinearities which for control algorithms are not really challenging. An additional inconvenience is introduced by the high cost of a real laboratory installation and its maintenance -even when it is just a pilot plant. Tanks with variable surface area presented in this article seem to be a strong challenge for the process control. They seem to be the good alternative for the mentioned processes due to the fact that the cost of developing and maintaining such an installation is relatively low.
Redevelopment of a large scale engineering course from a traditional to blended model is a challenging prospect. Based on more than five years experience with the Circuit Theory course redevelopment, some basic guidel...
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ISBN:
(纸本)9780889868168
Redevelopment of a large scale engineering course from a traditional to blended model is a challenging prospect. Based on more than five years experience with the Circuit Theory course redevelopment, some basic guidelines are given. Both the learning component and assessment program are taken into account. A special attention is laid on final examination and its redevelopment from traditional to e-exam form, with fully automatic pre-exam preparations, post-exam marking and statistical analysis. Effectiveness of this model have been confirmed by both students and teachers.
This paper presents self-stabilizing statistical algorithm for validation and optimisation of communication channel. There is usually a need to transmit data describing some industrial process for purpose of archiving...
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ISBN:
(纸本)9783902661555
This paper presents self-stabilizing statistical algorithm for validation and optimisation of communication channel. There is usually a need to transmit data describing some industrial process for purpose of archiving and/or remote evaluation of system performance quality. The communication selfstabilization is possible in multi-agent system (MAS) when certain data loss for remote user is acceptable. Communication overload especially in case of wireless transmission may cause unpredictable data loss. System may self-organize and reach some stable equilibrium point where communication load level and data loss is optimal. Perturbation in system usually does not change structure of the MAS but change equilibrium point that guarantees optimal performance.
In pace with the technical progress in controllability of mechatronic systems including machines and industrial equipment, the systems of industrial controllers (both PLC and microprocessor ones) more and more frequen...
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ISBN:
(纸本)3908451604
In pace with the technical progress in controllability of mechatronic systems including machines and industrial equipment, the systems of industrial controllers (both PLC and microprocessor ones) more and more frequently use Ethernet-based networks for communication with supervising centres and surveillance systems. The Internet offers unsurpassed opportunities of remote programming as well as remote development, debugging and tuning the existing control software. Nowadays, supporting the remote tools and facilities is the essential requirement that is mandatory when decisions on purchase and implementation of industrial controllers are made. It is the underlying reason to launch more extensive research in that field. The presented paper describes dedicated software that has been developed to enable communication over the Internet within dispersed control systems. The system makes it possible to transmit and to receive short messages to and from the controlled actuators as well as to perform basic tasks related to management of data flow in networks that use TCD and UDP protocols. The special attention was paid to dynamic phenomena of the data exchange process. It is an issue of crucial importance within dispersed systems of industrial controllers and it assures efficient operation of the entire system owing to timely and quick respond to fast-changing control signals. Data exchange was carried out with the use of so-called primitives for Berkeley sockets that serve as primary structures within the network and are capable to perform basic operation such as creation and destruction, assigning network addresses to the sockets, establishing connections, transmission (broadcasting), receiving, etc. To measure time intervals of communication sessions the authors took advantage of functional features of contemporary motherboards of PC computers. In particular, the function of the API counter was used as it allows to readout the fast internal 64-bit counter which, in conse
This paper presents the HTTP request global distribution using the fuzzy-neural decision making mechanism. Two efficient algorithms GARDiB and GARDiB2 are proposed to support HTTP request routing to the Websites. The ...
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Generalized adaptive notch filters (GANFs) are used for identification/tracking of quasi-periodically varying dynamic systems and can be considered an extension, to the system case, of classical adaptive notch filters...
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Complex applications are describing using work-flows. Execution of these workflows in Grid environments require optimized assignment of tasks on available resources according with different constrains. This paper pres...
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Complex applications are describing using work-flows. Execution of these workflows in Grid environments require optimized assignment of tasks on available resources according with different constrains. This paper presents a decentralized scheduling algorithm based on genetic algorithms for the problem of DAG scheduling. The genetic algorithm presents a powerful method for optimization and could consider multiple criteria in optimization process. Also, we describe in this paper the integration platform for the proposed algorithm in Grid systems. We make a comparative evaluation with other existing DAG scheduling solution: Cluster ready Children First, Earliest Time First, Highest Level First with Estimated Times, Improved Critical Path with Descendant Prediction) and Hybrid Remapper. We carry out our experiments using a simulation tool with various scheduling scenarios and with heterogeneous input tasks and computation resources. We present several experimental results that offer a support for near-optimal algorithm selection.
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