The Patient Physiological Image (PPI) is a novel concept that manages the knowledge of Virtual Center for Renal Support (VCRS), currently being developed by the Biomedical Engineering Group of the University of Sevill...
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Automation control systems typically incorporate legacy code and components that were originally designed to operate independently. Furthermore, they operate under stringent safety and timing constraints. Current desi...
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Automation control systems typically incorporate legacy code and components that were originally designed to operate independently. Furthermore, they operate under stringent safety and timing constraints. Current design strategies deal with these requirements and characteristics with ad hoc approaches. In particular, when designing control laws, implementation constraints are often ignored or cursorily estimated. Indeed, costly redesigns are needed after a prototype of the control system is built due to missed timing constraints and subtle transient errors. In this paper, we use the concepts of platform-based design, and the Giotto programming language, to develop a methodology for the design of automation control systems that builds in modularity and correct-by-construction procedures. We illustrate our strategy by describing the (successful) application of the methodology to the design of a time-based control system for a rotorcraft Uninhabited Aerial Vehicle (UAV).
The Patient Physiological Image (PPI) is a novel concept that manages the knowledge of Virtual Center for Renal Support (VCRS), currently being developed by the Biomedical Engineering Group of the University of Sevill...
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The Patient Physiological Image (PPI) is a novel concept that manages the knowledge of Virtual Center for Renal Support (VCRS), currently being developed by the Biomedical Engineering Group of the University of Seville (GIB). PPI is a “virtual” replica of a patient, built by means of a mathematical model. From a technical point of view, PPI is a component-oriented software module based on cutting-edge of Modeling and Simulation Technology. In this paper we first state the features that the PPI component must fulfil to support the VCRS functionality. From those, the VCRS-PPI software architecture is described.
Genetic Algorithms has given rise to two new fields of research where (global) optimisation is of crucial importance: ' Genetic based Machine Learning ' (GBML) and ' Genetic programming ' (GP). An adva...
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Genetic Algorithms has given rise to two new fields of research where (global) optimisation is of crucial importance: ' Genetic based Machine Learning ' (GBML) and ' Genetic programming ' (GP). An advanced implementation of GBML (Fuzzy Efficiency based Classifier System, FECS, developed by the authors) and Genetic programming (as defmed by Koza) are both applied to the case study 'fibre-to-yarn production process'. Results for both systems are presented and compared. Finally, the GP generated equations are transformed into rule-sets similar to those obtained from FECS.
One task expected for the 21 st century is that when designing a system S , the fact will be respected that in it an information processing component C will exist, influencing the other components of S . In case C is ...
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One task expected for the 21 st century is that when designing a system S , the fact will be respected that in it an information processing component C will exist, influencing the other components of S . In case C is intended to simulate (using a simulation model m ), the simulation model used during the design of the system has to contain m . Especially the production systems and the logistic ones can serve as transparent illustrations of such a "model nesting", presenting the obstacles related to it and the surmounting of them.
Main topic of the poster is the communication between PLC Simatic S7 200 and SCADA system Intouch 7.0 via serial link RS 485. On side of the PLC is used freeport communication mode with our own protocol. The interface...
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Main topic of the poster is the communication between PLC Simatic S7 200 and SCADA system Intouch 7.0 via serial link RS 485. On side of the PLC is used freeport communication mode with our own protocol. The interface between PLC and Intouch is made by conversion program that use Dynamic Data Exchange (DDE). This makes possible with keeping protocol to communicate with other types of PLC&s too. In this manner is also possible to build a communication between several nodes.
The problem of designing complex dependable systems is addressed in this paper. Due to some peculiarities of their application and behavior these are often referred to as reactive systems. Two main paradigms for their...
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The problem of designing complex dependable systems is addressed in this paper. Due to some peculiarities of their application and behavior these are often referred to as reactive systems. Two main paradigms for their design have recently been proposed; we name these paradigms living processes and hidden concurrency, depending on their approach to concurrency handling. The analysis of application requirements and constraints is proposed as a methodology for selecting the most suitable implementation paradigm for a given application. Finally, it is shown that in some cases an intermediate paradigm may provide a suitable solution.
The aim of this work is to elaborate a mathematical model that should describe, as faithfully as possible, the solution filtering phenomenon through polymeric membranes. Based on this model an efficient PC computation...
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The aim of this work is to elaborate a mathematical model that should describe, as faithfully as possible, the solution filtering phenomenon through polymeric membranes. Based on this model an efficient PC computational program to determine the solution concentration at the membrane surface in different laboratory experiment configurations has been implemented. A detailed reference study on this problem is largely presents in References, see (Albu, 1994). To sum up, this study emphasizes the fact that, to make a correct description of the concentration polarization phenomenon, it is necessary to adopt the boundary layer model for describing the filtering type through the precipitate layer.
Based on a general design model for distributed control systems and using standardized languages of IEC 1131-3 for control, three approaches for programming are investigated. The first is based on IEC Programs with ex...
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Based on a general design model for distributed control systems and using standardized languages of IEC 1131-3 for control, three approaches for programming are investigated. The first is based on IEC Programs with extensions, the second is a decomposition of Programs with SFC notations and the third approach uses Function Blocks corresponding to the IEC TC65 Function Block Standard. The approaches are specified, compared and conclusions for the use and for further work are made. The intention of the contribution is to discuss possibilities for open programming models more than to present final results.
The industrial world lacks common models for the design and realization of distributed industrial-process measurement and control systems. The different models and approaches originate from private solutions of differ...
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The industrial world lacks common models for the design and realization of distributed industrial-process measurement and control systems. The different models and approaches originate from private solutions of different vendors of control equipment aimed at different customers. An approach for distributed control blocks is introduced and refined, which describes distributed control systems, hierarchical control systems, and agent systems. Since this model is currently under standardization in the International Electrotechnical Commission, widespread use can be expected and further contributions from research institutes will be helpful.
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