Software & Systems

Articles of journal № 1 at 2016 year.

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11. The information modeling system of corrosion protection of equipment [№1 за 2016 год]
Authors: Egorov A.F., Savitskaya T.V., Dementienko A.V.
Visitors: 6956
The volume of gas and oil production and the length of pipelines has significantly increased over the past 10–15 years. According to report data, annually more than 30 % of accidents on main pipelines happen because of corrosion. This issue is also relevant for chemical industry, in particular related to aggressive substances. Most of the existing information systems and databases related to industrial safety and corrosion protection are closed. This paper presents a functional structure of a developed information modeling system of corrosion protection of industrial equipment. It can also be used to protect pipelines. The paper describes the purpose and basic function blocks of the information modeling system. It also presentes a logical model of a material database, which is a part of a storage information subsystem, and a list of all other databases used within the system. When implementing, the authors used a three-tier architecture with a database management system and web-technologies. The article presents main user interfaces and a module of material selection. It describes the tasks for application of the information modeling system of equipment protection from corrosion.

12. Logical analysis of corrective operations to construct high-quality recognition algorithm [№1 за 2016 год]
Authors: Lyutikova L.A., Shmatova E.V.
Visitors: 8173
The article carries out a logical analysis on study domain, which includes the object and its characteristics described it in terms of running value logic. A research subject is methods and algorithms aimed to find practical solution to the problems of pattern recognition in weakly formalized areas or expertise. These areas include medical, technical, geological reconnaissance diagnostics, forecasting, expert systems construction. While solving such problems, a large number of incorrect (heuristic) algorithms were introduced. The authors examine the such aspects as: the importance of developing the theory of error-correcting operations, the synthesis of minimal complexity correct algorithms using mathematical logic. The most important problems in this field are the problems of logical regularity productive search in objects characteristic descriptions (when the objects are considered as elementary classifiers). The final rule uses a conjunction procedure for each of constructed elementary classifiers. As a general rule, recognition algorithm correctness (the ability to classify training objects correctly) is provided by correctness of each generated elementary classifiers. This is the basis of recognition procedures logical synthesis. However, to use the structures of a logic-algebraic approach in building correct recognition algorithms based on arbitrary sets of recognition algorithms including incorrect ones is of great interest. This paper considers the logical method of constructing algorithms, which includes sequential addition of a small part of unrecognized information. This method ensures correction of a previously constructed algorithm with insignificant changes of its characteristics. In many cases such inductive methods allow building highly accurate and correct algorithms that expand the area of the obtained solutions for substantially less time.

13. A microcontroller for a fuzzy control system in a sensorless BLDC drive [№1 за 2016 год]
Authors: Lgotchikov V.V., Gorchakov D.V.
Visitors: 11920
The paper suggests an option to implement a control system for a BLDC sensorless drive using fuzzy logic. In this case, using a fuzzy logic controller makes the system more stable and increases the quality of motor control. After testing the system model in Simulink the authors created a base of fuzzy rules. Adjusting the drive phase switching moment is possible due to using the base of fuzzy rules. Fuzzy logic control system uses normalized values of current and a rate of rotation as input parameters. A fuzzy regulator adjusts the moment of commutation using the base of fuzzy rules. The paper describes the scheme and the algorithm of the proposed control system, which is based on a microcontroller. It also considers a program code for the microcontroller implementing the sensorless algorithm. The authors calculated minimal requirements for computational power of the microcontroller to create a control system. The analysis shows that almost any conventional industrial microcontroller is suitable for the proposed control system. As a result, it can be stated that using in-tellectual control methods in sensorless drive motors is reasonable due to the current level of computational devices' devel-opment. Such usage can significantly increase the quality of control while the cost of the whole system is almost the same.

14. Modeling of social and economic processes for subject of administration [№1 за 2016 год]
Authors: Piskunov A.A., Suvorov A.V.
Visitors: 4359
The paper describes a semantic topology of a concept structure for social and economic processes (SEP) in the Russian Federation. It is based on a formal model called a Special Form Dynamic Hypergraph. To describe SEP the authors define the notions of a sanction, an operation, a transaction. These terms are applied to design a SOT space (sanction, operation, transaction). In this SOT space the authors design calendar structure and calendar-technology structure within the model of Special Form Dynamic Hypergraph to describe some processes of elements modification and SEP structures.

15. Some technological aspects of creating educational training equipment for Navy commanding officers and specialists [№1 за 2016 год]
Authors: Andreev V.Yu., Bazlov A.F., Ilin V.А., Shuvanov А.D.
Visitors: 12547
The article discusses the connection between teaching and information technologies, as well as technologies for creating educational training equipment for naval specialists. The authors analyze the system for educating and training ship commanding officers and naval experts. They consider the concepts of education and teaching technologies that serve as a base for training. The education and training system analysis defines the nomenclature of necessary training facilities. The paper includes a list of tasks that should be defined for development of educational and training systems. There is an overview of a hardware structure of modern automated systems for education and training, which tend to be serial products with necessary modifications. Part-task and complex simulators can include training and operating equipment, as well as hardware and software simulators of real equipment. The article considers the division of software on general and special. There is also a possible list of software products in-cluded in general and in special software. Special software in educational training equipment includes software models of ob-jects, resources, environment, combat actions, educational information models, guidelines software. Model and process development includes their verbal, mathematical and algorithmic description, programming, testing and debugging. Verbal, mathematical and algorithmic description, if possible, should be carried out by future users or experts in the subject area, and testing should be carried out by both programmers and specialists. The paper presents a list of private technologies for creating training facilities. It also determines the structure and content of development technologies for basic software components of modern automated education and training systems.

16. On power tracing distribution in electric networks [№1 за 2016 год]
Authors: Balametov A.B., Khalilov E.D., Isaeva T.M., Isgenderov F.G.
Visitors: 8999
A research on the problem of power and energy flaws distribution between market participants is nessessary due to reforms of power supply sector, the possibility of wide use of renewed power sources, division of power and energy transfer services, definition of current and voltage harmonicity distortions sources. At market condi-tions electric power cost can be different in generating stations and other suppliers. Therefore, nodal pricing is an important problem. Nodal prices include losses in networks. The process of electric power flow tracing allows establishing the routes that connect particular generators with particular consumers, as well as defining shared contributions of generators to cover loading with regard to address distribution. The addressing method also allows defining a power transit price. The rules of joining new consumers to an electric network make it nessessary to carry out a structural analysis of a power system on ultraharmonics. The article investigates address distribution of active power flows and losses between the participants of the electric power market. The authors developed the algorithm and a program to solve the problem of power tracing and power losses. In the developed program Zbus matrix is used to solve the equations of the established modes, as well as to calculate nodal losses. For research of active power address transfer the authors used the IEEE 6bus test scheme, 8bus and 26bus equivalent schemes of Azerbaijan electric-power system. Results of address distribution calculations can be used when awarding two-sided contracts, calculating nodal prices, defining transfer costs etc.

17. An optimization algorithm to find inscribed polyhedron of maximum volume [№1 за 2016 год]
Author: Kokorev D.S.
Visitors: 4411
The article discusses the problem of finding the polyhedrons with given shape inside other polyhedrons. This problem is a particular case of the third part of the 18th Hilbert problem. It can be applied in computer simulation of three-dimensional objects, the autonomous robots moving and the jewelry industry. The article offers several alternative methods of finding inscribed polyhedrons based on the reduction of the problem to a nonlinear programming problem and solving it using ready-made software resources. The basic idea is that the problem is easily described in terms of non-linear programming. Internal polyhedron volume is an objective function. Restrictions include saving a combinatorial structure, a polyhedron being inside another one, convexity and additional constraints that are necessary for practical purposes. This article describes two different ways to specify a nonlinear programming problem. In addition, it describes free software resources to solve this problem. To make work with non-linear programming solvers easier, only the third order polynomials can be used as the functions. The proposed possible approximations for the main types of restrictions allow to convert all the necessary restrictions to the third-order polynomials. Finally, the article describes a distributed testing system and the algorithm effectiveness. The testing system was developed in Python and is used to test and develop the algorithm. It allows aggregating data across multiple runs of the algorithm in a user-friendly format and comparing results of different versions of the algorithm.

18. An experience in development of educational training equipment for the Navy [№1 за 2016 год]
Authors: Bazlov A.F., Risunkov V.B., Sokolov S.N., Struchkov A.M.
Visitors: 9632
The advent of high-performance computer equipment and software tools, telecommunication and multimedia technologies, interactive technologies, new tools for data playback and presentation from digital media changed the requirements to development of training facilities. They also showed new opportunities of training facilities, the feasibility of modern innovative technologies in education and combat training. One of the main directions of the Research Institute Centerprogramsystem activities (Tver) is design, development, pro-duction of training equipment. The company has four main areas in the work connected to creation of naval training facilities: automated training systems, special simulators, complex training devices, training complexes.

19. Application features of object-oriented design for hard real time embedded systems [№1 за 2016 год]
Authors: Arzhaev V.I., Skvortsov А.V.
Visitors: 5824
The article considers the problems of object-oriented software development of embedded real-time systems. It also discusses the problems that require implementation using programming languages and hardware description languages. A particular feature of processing elements of heterogeneous computing platforms is a significant volume of main and external memory, as well as flexibility of implemented control algorithms and data formats. At the same time, kernel elements implemented in hardware description languages provide greater speed. The paper suggests the principles of a functional software decomposition for the purposes of implementation on a hetero-geneous computing platform. They bring together objects with similar requirements for events response time in subsystems. The events are relevant to an element of a hardware platform. The paper describes an example of their application, which includes an element design process of a real-time technological process control system that have limitations in two time scales. The paper describes the subsystem operating in a millisecond cycle. It is implemented as the software component for a Linux-based RTOS environment. There also is a microsecond cycle subsystem implemented in FPGA. The paper presents a decomposition diagram and a diagram of conditions, as well as a timing chart describing the basic resource loading equipment. In addition, the paper defines the time limit for the software subsystem. As a result, practical application of the described RTES decomposition principles shown that this approach allows a reasonable distribution of loads on a hardware platform and enforces restrictions in hardware and software parts of the system imposed by the requirement of a hard real-time operation mode.

20. Modern software development methods for secured automated systems [№1 за 2016 год]
Authors: Karpov V.V., Karpov A.V.
Visitors: 10774
Regulations and state standards are the main documents for regulating development of secured software automated systems. However, it has been a while since their adoption, and a software development technology is upgrading fast. In particular, the classical software development waterfall model, which was taken as a basis for these state standards and had been popular for many years, is recently found to be ineffective due to the lack of flexibility in formal development management. Lack of a development process flexibility leads to an inability to respond to emerging changes of system requirements and may lead to nonfulfillment of requirements specifications. The hybrid development method that combines the advantages of classical approach and modern flexible methods can solve the contradiction between a high technological level of modern automated systems development and outdated requirements of governing documents. The integration of modern flexible design techniques led to appearing of combination development models. At the stages of a waterfall model of software development life cycle they are of great interest both from the scientific point of view (to improve methodological approaches to software development), and practical (for high-quality software that corresponds to the requirements). The article describes some features of introduction of flexible development methods of special purpose functional software. They were identified by the experts of the Research Institute Centerprogramsystem when working on development projects. These features include requirements formation and management including tracing and prioritization, planning and tracking a work progress. The authors consider a number of differences between these types of activities in the development of special purpose software executed in accordance with state standards and a classic waterfall development method. They suggest solutions for organizing a hybrid process that combines the advantages of waterfall and flexible methods of special purposes functional software development and ensures an appropriate implementation according to government standards.

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