Roxana Both

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This paper is a step forward by making real time control system design to monitor and control process variables to ensure its smooth operation and desired reliability. Liquid nitrogen level in the condenser is a core component of isotopic separation process to obtain (<sup>13</sup>C), so is needed a special focus on monitoring and control. The goal of the(More)
High purity <sup>13</sup>C isotope is widely used in numerous areas of medicine, including tests to evaluate metabolism problems, ulcer diagnostics, studies of amino-acids kinetics and especially to highlight metabolic changes in the human brain that help diagnose earlier important diseases such as Alzheimer and other neuropsychiatric abnormalities. It is(More)
Ammonia synthesis is a very important process in the national economy and the column synthesis with the additional expensive equipments justify the necessity of the mathematical modeling, model validation and control system implementation. The work presents some problems of the ammonia synthesis model based on fundamental equations from physics and chemical(More)
Fractional order calculus has been used intensively to control various types of processes. The main approaches towards fractional order controllers focus on the single-input-single-output systems. The general design procedure consists in a frequency domain specification of various performance criteria followed by optimization routines. The implementation(More)
Cryogenic isotope separation columns are unique equipments used to produce enriched substances in the isotope of interest for many industrial applications. The control of an isotope separation column is a difficult and challenging task, being a highly nonlinear plant with large time constants and time delays. A single column can enrich only to a low level(More)
Sustainable engineering implies the active management of engineering resources, by cutting down expenses and ensuring the premises for further development. Advanced control strategies offer increased robustness, high reliability and efficiency, but they require fast computation times and powerful numerical resources. Hence, the trend in control engineering(More)
Railway has been playing a significant role in passenger and cargo transportation. Electric railway systems are of growing importance with recent augments on energy saving and environmental friendly. The advantages of electrical railway compared to other transportation systems are cheaper sources of energy, lightweight locomotives, easier maintenance and a(More)
One of the main elements of a cryogenic (C) separation column is the boiler. The control of the power supply which feeds the boiler’s resistance is of major importance. In order to ensure a safe and stable operation of the plant, a monitoring and control unit is designed using NI PXI-8183 process computer. The developed LabVIEW application implements a PI(More)
In the petrochemical technological processes, the synthesis of 2 ethyl-hexanol-oxo-alcohol is of highest importance, being achieved through catalytic hydrogenation of 2 ethyl-hexenal. The hydrogenation reaction is highly exothermic so the reactor output temperature may become critical. The paper models the complex process of these chemical reactions and(More)
Controller design for an isotope separation column is recognized as a difficult and challenging problem, especially when the controller used is of fractional order. The objective of this work is to find out optimum settings for a fractional PI<sup>&#x03BB;</sup> controller in order to fulfill three different robustness specifications of design for the(More)