ALICE Controls data produced by commercial SCADA system WINCCOA is stored in ORACLE database on the private experiment network. The SCADA system allows for basic access and processing of the ...historical data. More advanced analysis requires tools like ROOT and needs therefore a separate access method to the archives. The present scenario expects that detector experts create simple WINCCOA scripts, which retrieves and stores data in a form usable for further studies. This relatively simple procedure generates a lot of administrative overhead – users have to request the data, experts needed to run the script, the results have to be exported outside of the experiment network. The new mechanism profits from database replica, which is running on the CERN campus network. Access to this database is not restricted and there is no risk of generating a heavy load affecting the operation of the experiment. The developed tools presented in this paper allow for access to this data. The users can use web-based tools to generate the requests, consisting of the data identifiers and period of time of interest. The administrators maintain full control over the data – an authorization and authentication mechanism helps to assign privileges to selected users and restrict access to certain groups of data. Advanced caching mechanism allows the user to profit from the presence of already processed data sets. This feature significantly reduces the time required for debugging as the retrieval of raw data can last tens of minutes. A highly configurable client allows for information retrieval bypassing the interactive interface. This method is for example used by ALICE Offline to extract operational conditions after a run is completed. Last but not least, the software can be easily adopted to any underlying database structure and is therefore not limited to WINCCOA.
One of the research activities of the Center of Modern Control Techniques and Industrial Informatics (CMCT&II) is the Center for Nondestructive Diagnostics of Technological Processes (CNDTP) ...implemented as part of the TECHNICOM project at the Technical University of Košice in accordance with the project's intention to improve conditions for transferring research results into practice. The focus of the Center's research is on nondestructive, contactless diagnostics of technological processes relying on image recognition systems where images are scanned by means of contact-free characteristics scanning through grayscale, color or thermovision cameras. This equipment is integrated into the control systems of technological processes and interconnected with the mechatronic parts of technological devices or production lines such as servo systems, mobile and manipulator robots. Our project therefore involves a wide range of technical, programming and networking resources which allow the development, experimental verification and adjustment of solutions related to monitoring, diagnostics and control of technological processes.
The purpose of this article is to perform an in-depth analysis of the classical double inverted pendulum system using the Inverted Pendula Modeling and Control (IPMaC), a Simulink block library ...designed by the authors of the paper. The custom function blocks included in the IPMaC offer comprehensive program support for the modeling, simulation and control of classical and rotary inverted pendula systems. The library also incorporates software tools which provide a user-friendly graphical interface (GUI) to modeling and linearization procedures. With the aid of appropriate function blocks, GUI tools and demonstration schemes from the IPMaC, the classical double inverted pendulum system is analyzed, modeled and successfully stabilized in the unstable inverted position.
This paper presents design, implementation and experimental verification of logging mechanism for collaborative systems that contains separate database for storing the logs of events from the system, ...communication services between database and examined system and some simple analytical services to provide basic summarized information about saved data. The proposed approach was tested within four selected collaborative systems, namely KP-Lab System, Claroline, Moodle and Dokeos. The main motivation behind described solution is to obtain real data for different analytical purposes.
The purpose of this paper is to perform an in-depth analysis of the rotary single inverted pendulum system using a Simulink block library designed by the authors of this paper - the Inverted Pendula ...Modeling and Control (IPMaC), which offers comprehensive program support for modeling, simulation and control of classical and rotary inverted pendula systems. With the aid of appropriate function blocks, GUI applications and demonstration schemes from the IPMaC, the rotary single inverted pendulum system is analyzed, modeled and successfully stabilized in the unstable inverted position.
The oscillatory properties of solutions to the nth order delay differential equations Lny(t)+p(t)y(τ(t))=0,where Ln is a disconjugate strongly noncanonical differential operator, p(t)>0, τ(t)≤t, and ...limt→∞τ(t)=∞, are studied. The main idea is to show that, unlike Trench original, rather theoretical result, simple closed formulas appearing in a uniquely determined canonical representation of Ln are possible, under one (mild) additional condition. As a consequence, new oscillation theorems for strongly noncanonical higher-order equations are formulated. Moreover, our results generalize even several ones obtained for n=3,4.
In the paper, we provide an extension of the classical Kneser oscillation theorem to a class of second-order half-linear advanced differential equations. Our results are unimprovable in the sense ...that the involved oscillation constant is best-possible. As far as we know, no similar result is known even in the linear case. In contrast with existing related results, we relax the common assumption that the deviating function is nondecreasing.
This article concerns the oscillation of solutions to a linear second-order differential equation with advanced argument. Sufficient oscillation conditions involving limit inferior are given which ...essentially improve known results. We base our technique on the iterative construction of solution estimates and some of the recent ideas developed for first-order advanced differential equations. We demonstrate the advantage of our results on Euler-type advanced equation. Using MATLAB software, a comparison of the effectiveness of newly obtained criteria as well as the necessary iteration length in particular cases are discussed.
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