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On the Choice of a Model for Representing Data Flow Parameters in a Digital System

On the Choice of a Model for Representing Data Flow Paramete...

引用

2023 International Russian Smart Industry Conference, SmartIndustryCon 2023

作者： Promyslov, Vitaly Semenkov, Kirill V.A. Trapeznikov Institute of Control Sciences of RAS Laboratory of Distributed Information and Control Systems Moscow Russia

ISBN: (纸本)9781665464291

The paper considers the problem of analyzing the characteristics of a digital control system as a black box based on the input and output flows characteristics. The Network calculus method is proposed as a system model. The method makes possible to describe the system as a set of deterministic constraints or arrival curve on the flow. The paper proposes to extend the Network Calculus for the case when the flow is described by more than two parameters and extend Network Calculus for multidimensional feature space. An example the feature space may be consist from a packet sequence number, packet size and packet arrival time. The multidimensional flow might be described in a framework of the Network Calculus by some multidimensional arrival cure used to compute boundaries on the flow behavior and characteristics. The proposed extension of the network Calculus makes possible to model a wider class of systems, for example, considering non-uniform data flows. © 2023 IEEE.

关键词： Digital control systems

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On the Arrival Curves Calculation for Facilities of Increased Danger 16

On the Arrival Curves Calculation for Facilities of Increase...

引用

16th International Conference Management of Large-Scale System Development, MLSD 2023

作者： Baybulatov, Artur V.A. Trapeznikov Institute of Control Sciences of Ras Laboratory of Distributed Information and Control Systems Moscow Russia

ISBN: (纸本)9798350337907

For present-day facilities of increased danger, such time-related performance measures as delays in control actions transmission and emergency signals presentation are critical. Taking into consideration the appropriate control systems, one can note that the knowledge of arrival processes is necessary for the assessment of such delays. A couple of significant branches of applied mathematics: queueing theory and a theory of deterministic queuing systems network calculus operate with arrival processes and can help with delay evaluation. Arrival curves, a representation of arrival processes in network calculus, seem to be much easier to handle and obtain than probability distributions used in queueing theory. Nevertheless, many different arrival curves can be distinguished, each of them having its pros and cons. The article considers the problem of arrival curve representation and calculation for facilities of increased danger. It discloses the duality of the concept of arrival curve and investigates different types of them: the classical minimal arrival curve, the empirical one, linear arrival curves based on the empirical ones, and arrival curves on finite intervals. For the empirical arrival curve, the algorithm is presented, and the drawbacks are revealed. The advantages and disadvantages of empirical-based linear arrival curves are pointed out. The concept of arrival curves on finite intervals is considered, and the linear representation of them is highlighted. The algorithm for the calculation of linear arrival curves on finite intervals is presented, and their advantages are discussed. © 2023 IEEE.

关键词： Queueing theory

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Flexible Modeling System: Steam Generator Model

Flexible Modeling System: Steam Generator Model

引用

2023 International Russian Automation Conference, RusAutoCon 2023

作者： Jharko, Elena V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences Laboratory of Distributed Information and Control Systems Moscow Russia

ISBN: (纸本)9798350345551

The paper considers the factors stimulating the development of new, more efficient power unit control systems. A diagram of a flexible modeling system is presented with a breakdown into functional blocks corresponding to the systems of a power unit with a VVER-1000 type reactor. The paper presents a mathematical model of a steam generator, part of a flexible modeling system. The mathematical model describes the thermohydraulic state of steam generators and steam pipelines connecting them to the turbine. An algorithm for calculating the parameters of steam generators and steam pipelines at a new time step is presented. Verification of the presented model of the steam generator in the dynamic mode of the NPP power unit with a VVER-1000 reactor with the isolation valve of the steam generator at the stage of mastering the power of 75% was verified and showed good agreement between the calculated and experimental data. © 2023 IEEE.

关键词： Steam generators

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Critical information systems: Software Quality and Dependability

Critical Information Systems: Software Quality and Dependabi...

引用

2023 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2023

作者： Jharko, Elena V.A. Trapeznikov Institute of Control Sciences The Russian Academy of Sciences Laboratory of Distributed Information and Control Systems Moscow Russia

ISBN: (纸本)9781665475952

One of the main directions of management development in current conditions has become the massive use of the latest computer and telecommunications equipment and the formation of highly efficient information technologies. information technology, information systems, and high-productivity technologies are the key systems of the innovation economy. These technologies are fundamentally changing all ways of receiving, processing, transmitting, and producing information and are fundamentally technologizing intellectual activity. Hence the exceptional importance of building reliable and functionally secure information systems, the central element of which is software. The paper presents models and metrics of software quality, considers issues of ensuring functional reliability, shows the relationship between functional and information security of critical information systems for facilities with an increased risk of operation, and presents a comprehensive model for determining the probability of parrying any information attack from a stream of attacks. The presented approaches are used to develop top-level systems for automated process control systems for nuclear power plants. © 2023 IEEE.

关键词： information systems

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Some Issues in Using the Model of Determining the User Stories Quality to Reduce Software Development Risks

Some Issues in Using the Model of Determining the User Stori...

引用

International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM)

作者： Elena Jharko Laboratory of Distributed Information Analytical and Control Systems V.A. Trapeznikov Institute of Control Sciences of RAS Moscow Russia

ISBN: (数字)9798350395013

ISBN: (纸本)9798350395020

The paper analyzes and compiles the key factors influencing the quality of user stories in the software development process. These factors include clarity and completeness of requirements, technical feasibility, priority of requirements, clarity and understandability of the user story, and others. A Model of Determining the User Stories Quality (MDUSQ) is proposed. This model includes a set of metrics and indicators that help evaluate and determine the quality of user stories. MDUSQ metrics may include quantitative metrics, qualitative metrics and performance metrics. Applying the MDUSQ will help improve requirements during software development and reduce the risk of requirements changes. Analyzing and collecting key quality factors and using MDUSQ metrics will help ensure that user stories are complete, understandable, and meet customer and user needs.

关键词： Measurement Q-factor Agile software development Industrial engineering Software Manufacturing Software development management

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On Some Issues of Modeling a Pressure Compensator in a Flexible Modeling System

On Some Issues of Modeling a Pressure Compensator in a Flexi...

引用

International Conference on Management of Large-Scale System Development (MLSD)

作者： Elena Jharko Laboratory of Distributed Information Analytical and Control Systems V.A. Trapeznikov Institute of Control Sciences of RAS Moscow Russia

ISBN: (数字)9798350375718

ISBN: (纸本)9798350375725

The article discusses aspects of modeling a pressure compensator based on two models (equilibrium and a model that considers the nonequilibrium of the vapor and water phases), which are part of a flexible modeling system (FMS). The limits of applicability of the presented models are considered. The results of verification of the presented model of a pressure compensator as part of the FMS in the dynamic mode of a power unit nuclear power plant were carried out.

关键词： Frequency modulation Computational modeling Instruments Valves Robustness Digital twins Large-scale systems Power generation

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Intelligent Support systems for NPP Operators: Dynamic Modeling and Operational Diagnostics

Intelligent Support Systems for NPP Operators: Dynamic Model...

引用

2023 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2023

作者： Jharko, Elena Chernyshov, Kirill V.A. Trapeznikov Institute of Control Sciences The Russian Academy of Sciences Laboratory of Distributed Information and Control Systems Moscow Russia V.A. Trapeznikov Institute of Control Sciences The Russian Academy of Sciences Laboratory of Identification of Control Systems Moscow Russia

ISBN: (纸本)9781665475952

The efficiency of human-machine interaction is highly dependent on the quality of information support that the power unit (PU) operators receive from the control system in different operating modes of NPP PU. The paper shows the importance of intelligent support systems (ISS) for NPP operators to ensure the reliable operation of the NPP power unit. The most significant elements of the ISS for operators in terms of the diagnostic system are the block of dynamic modeling, which anticipates the course of technological processes, and the expert system. The paper analyzes the state of the problem of creating dynamic modeling systems, singles out a "three-step"approach to creating the predictive models of a technological process, and shows its shortcomings. Relationships between dynamic modeling and operational diagnostics (OD) are presented. A group of standard diagnostic systems and classes of problems of the solvable problems of ODs are considered. The implementation of the solution to the problem of diagnosing in the intelligent support system of the NPP operator, as well as functional diagrams of operational diagnostics, is presented. The proposed implementation of the tasks of operational diagnostics is used to create intelligent support systems for NPP operators. © 2023 IEEE.

关键词： Expert systems

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Digital Twins: Forecasting and Formation of Optimal control Programs for NPP Power Units

Digital Twins: Forecasting and Formation of Optimal Control ...

引用

2023 International Russian Smart Industry Conference, SmartIndustryCon 2023

作者： Jharko, Elena Chernyshov, Kirill V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences Laboratory of Distributed Information and Control Systems Moscow Russia V.A. Trapeznikov Institute of Control Sciences of the Russian Academy of Sciences Laboratory of Identification of Control Systems Moscow Russia

ISBN: (纸本)9781665464291

Industries, especially in the energy sector, are using digital twins to improve work efficiency and optimize operating modes. Digital twins have based on models that accurately describe the geometry, physical properties, behavior, and rules that characterize an object. The article presents an example of functional decentralization of digital twin models as a decomposition of an NPP power unit (PU) with a VVER-1000 reactor as a control object into a set of technological subsystems of functional groups. Approaches to the digital twins' creation of NPP PU and the main directions for using digital twins based on dynamic models of a PU in advanced control systems for NPP power units are presented. Within the framework of the intelligent operator support system, a three-stage approach to the problem of forecasting the state of the NPP PU, based on digital twins, and the principles of forming the PU optimal control are proposed. The proposed approaches to creating digital twins are used to create intelligent support systems for operators. © 2023 IEEE.

关键词： Forecasting

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Risk Assessment and Cyber Security of Nuclear Power Plants 15

Risk Assessment and Cyber Security of Nuclear Power Plants

引用

15th International Conference Management of Large-Scale System Development, MLSD 2022

作者： Poletykin, Aleksey Promyslov, Vitaly Jharko, Elena Semenkov, Kirill V.A. Trapeznikov Institute of Control Sciences of Ras Laboratory of Distributed Information and Control Systems Moscow Russia

The paper considers the problem of cybersecurity risk assessment for process control systems (APCS) of critical facilities. Using the example of APCS for NPP, the internal and external context of risk assessment is co... 详细信息

ISBN: (数字)9781665497015

ISBN: (纸本)9781665497015

关键词： Risk assessment

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Reserved Network Software Channels for Data Exchange in Large-Scale control systems for APCS of NPP 15

Reserved Network Software Channels for Data Exchange in Larg...

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15th International Conference Management of Large-Scale System Development, MLSD 2022

作者： Byvaykov, M.E. V.A. Trapeznikov Institute of Control Sciences of Ras Laboratory of Distributed Information and Control Systems Moscow Russia

The task of reserving of network software channels for data exchange in the Top-level subsystem (TLS) of the Automated process control system (APCS) of a Nuclear power plant (NPP) is considering. The methods for solvi... 详细信息

ISBN: (数字)9781665497015

ISBN: (纸本)9781665497015

关键词： Electronic data interchange

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