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检索条件"机构=Laboratory of Distributed Information and Control Systems"

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NPP Upper Level control System Databases: The Problem of Making Changes 17

NPP Upper Level Control System Databases: The Problem of Mak...

引用

17th International Conference on Management of Large-Scale System Development, MLSD 2024

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

ISBN: (纸本)9798350375718

In present-day industrial control systems responsible for effective and safe operation of nuclear power plants (NPP), the databases of the upper level playa crucial role in process monitoring and control as they acquire, process, and present to the operator the data from all the lower-level systems. Moreover, the air-gapped separation of the upper level makes them extremely valuable for the entire manufacturing management. The specific feature that should be taken into account when dealing with databases of upper level control systems is that they are not perfectly stable and due to the modifications being introduced in lower-level systems subject to changes at all stages of the life cycle. The problem of making changes to the databases combining information of all lower-level devices and so being highly complicated happens to be particularly serious. The article considers the databases of NPP upper level control systems and delves into the problem of making changes to them. A brief overview of the upper level control system illustrating the importance of databases is presented. The description of working databases is provided, their characteristic features are highlighted and the basic principles of the methods for making changes to them are disclosed. © 2024 IEEE.

关键词： Nuclear power plants

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On Some Issues of Modeling a Pressure Compensator in a Flexible Modeling System 17

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

引用

17th International Conference on Management of Large-Scale System Development, MLSD 2024

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

ISBN: (纸本)9798350375718

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. © 2024 IEEE.

关键词： Nuclear power plants

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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

2024 International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2024

作者： Jharko, Elena V.A. Trapeznikov Institute Of Control Sciences Of Ras Laboratory Of Distributed Information Analytical And Control Systems Moscow Russia

ISBN: (纸本)9798350395013

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. © 2024 IEEE.

关键词： Software design

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Method. Algorithm and Scenarios of Using a Group of UAVs as Base Stations for a Group of Ground Mobile Agents

Method. Algorithm and Scenarios of Using a Group of UAVs as ...

引用

2024 International Russian Automation Conference, RusAutoCon 2024

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

The paper proposes a method, an algorithm and scenarios of the use of a group of unmanned aerial vehicles (UAVs) as base stations to provide radio communication for a group of ground mobile agents (GMAs) as part of heterogeneous dynamic technical systems (HDTSs) operating in an intelligent environment. The work gives the mathematical description of the problem of choosing sub-optimal (rational) composition and spatial distribution of the UAV s, and calculating the coverage range (radius) for DAV-DAV and DAV - GMA links respectively. The proposed algorithm allows forming the composition of the DAV group (iteratively) to ensure that the coverage for the GMAs when moving in a given region. The algorithm checks the expediency of moving the D A V s (or their operation in current positions), moves additional DAVs from the base or returns unused DAVs to the base (changes their state to inactive), if necessary. The main tasks to be performed by the HDTS (composed of the groups of DAVs and GMAs) have been determined. The paper proposes several scenarios for the use of the UAVs to ensure radio communications for ground mobile agents. The work offers the requirements to the developed solution as part of the security monitor of a HDTS, including the functionality, a set of target parameters, and the main events/possible failures that can occur during the mission © 2024 IEEE.

关键词： Radio communication

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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...

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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 Level Calculation 16

Flexible Modeling System: Steam Generator Level Calculation

引用

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

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

ISBN: (纸本)9798350337907

The paper presents a mathematical model for calculating an NPP power unit's steam generator (SG) level with a VVER-1000 reactor, part of a flexible modeling system (FMS). The distributed model of an SG is designed for a more detailed description of processes in a two-phase volume of SG and modeling the readings of level gauges in non-stationary operating modes. The results of verification of the presented model as part of the FMS in the dynamic mode (disconnection of one turbopump pump from two operating ones) of the NPP power unit are presented. © 2023 IEEE.

关键词： Steam generators

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EBIOS and FSTEC Risk Assessment Method Comparison 16

EBIOS and FSTEC Risk Assessment Method Comparison

引用

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

作者： Chernyaev, Maxim V.A. Trapeznikov Institute of Control Sciences of Ras Laboratory of Distributed Information-Analytical and Control Systems Moscow Russia

ISBN: (纸本)9798350337907

This article aims to compare two risk assessment methods: EBIOS and FSTEC. EBIOS is published by the National Cybersecurity Agency of France (ANSSI), while FSTEC originates from Russia. Both methods are used relatively locally, but prove capable in France and Russia respectively. This article briefly describes those methods and compares them. The following research is subjective, and the author compares those methods based on his personal preferences, since no other such comparisons are known. During the research, both methods are briefly described and compared since both have appropriate pros and cons, while both may perform better in a particular situation. It leads to the conclusion that the application of both such methods can prove effective, and the main goal is to choose the most suitable approach for a particular situation. © 2023 IEEE.

关键词： Cybersecurity

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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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