Issue № 4(8) Vestnik of Tver State Technical University. Series «Technical Science»

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• INCREASING THE WEAR RESISTANCE OF THE CUTTING TOOL
  Authors: M.Sh. MIGRANOV, Dr. Sc., A.M. MIGRANOV, Postgraduate
  Abstract: Results of research of increase of wear resistance of the tool by geometrical adaptation of the form of the cutting wedge at machining by cutting and milling of various materials on machinability, are given. The possibility of increasing the wear resistance of the cutting tool by 75…90 % while ensuring and improving the quality of the treated surface layer is confirmed.
  Keywords: friction, wear, cutting wedge, geometric adaptation, self-organization, turning, milling.

• LUBRICATING OILS BASED ON ORGANOSILICON NANOFLUIDS
  Authors: G.B. BURDO, Dr. Sc., A.N. BOLOTOV, Dr. Sc.
  Abstract: Technological features of synthesis of a polyethylsiloxane-based lubricating nanomaseline are described, and its lubricating properties are investigated under various friction conditions. Recommendations are given for the selection of components for creating magnetic lubricating oil, which are characterized by various mechanisms for reducing friction and wear of rubbing surfaces. The specific features of the processes of friction of surfaces lubricated with magnetic nano-oil are shown.
  Keywords: magnetic lubricating oil, friction; wear, dispersed phase, magnetic dispersed phase, antifriction additives, antiwear additives.

• FEATURES OF THE CALCULATION OF THREADED JOINTS OF SLEWING BEARINGS
  Authors: A.S. IVANOV, Dr. Sc.
  Abstract: The particularities of loading and calculation of threaded joint for rotating and stationary related to the load of the bearing rings have been considered. The formula for calculating the safety factor of the fatigue strength of screw threaded parts has been justified.
  Keywords: slewing bearing, screw, fatigue strength, response factor to cycle asymmetry.

• ANALYSIS OF THE RELIABILITY OF PEAT MACHINES IN THE PROCESS OF DESIGN
  Authors: I.V. GORLOV
  Abstract: The article discusses the method of preliminary analysis of the reliability of the design of peat machines (PM) at the design stage. For the designed TM, it is possible to assess the reliability using generalized statistical data on similar peat machines, but significant errors arise that do not allow predicting the technical condition of the equipment under development with the required accuracy. The proposed technique makes it possible to evaluate the developed design of the machine in terms of reliability based on the analysis of the operation of similar units of existing PM. For this, the existing peats machines are divided into separate mechanisms, for which there are statistics on failure parameters. The division of the designed machines is carried out in a similar way; while in order to obtain the necessary reliability parameters, it is proposed to use the coefficient calculation method, taking into account the presence in the developed PM design of the number of the most critical parts and assemblies. Thus, the use of data from the operation of existing PM makes it possible to improve the quality of predicting changes in the reliability parameters of the machines being developed, and as a result, during their operation, a decrease in the number of downtime due to difficult-to-predict failures is achieved, which makes it possible to increase the seasonal productivity of PM.
  Keywords: peat machines, operation, reliability, resource, forecasting, productivity, research.

• CALCULATING AND FORECASTING HARDWARE PERFORMANCE FOR UNDERWATER MINING OF SOLID MINERALS
  Authors: M.G. RAKHUTIN, Dr. Sc., A.S. KASHIRSKIY, Engineer
  Abstract: In this article, new classification features of machines for underwater mining of solid minerals are proposed, such as their cyclical and continuous operation. It is established that for cyclical machines starting from a depth of 300…500 m the speed of movement of the executive body (trawl, drag, etc.) and the concentration of minerals do not have a determining value. When selecting equipment for underwater mining at a depth of more than 100 m and forecasting its performance, it is proposed to take into account the depth of development for cyclical machines, the speed of lifting and lowering of the executive body, and for continuous machines, reliability indicators, for example, the readiness coefficient determined by expert means.
  Keywords: машины для подводной добычи, классификационные признаки, твердые полезные ископаемые, эксплуатационная производительность, Мировой океан, железомарганцевые конкреции.

• SPECIFIC FEATURES OF DEFORMATION OF THE GROOVED CONVEYOR BELT AT LOW TENSIONS
  Authors: V.P. DYACHENKO, Cand. Sc.
  Abstract: The article presents analytical dependences for the maximum permissible bending radius of the conveyor belt in the longitudinal direction, in which the shape of the gutter is lost in areas with low tension, depending on the design and physical and mechanical properties of the belt. The results of calculations based on these dependencies for a number of modern rubber-fabric and rubber-rope belts are presented. The results obtained can be applied to determine the minimum allowable belt tension and the maximum allowable belt deflection, which usually occur in the loading zone of the conveyor and are the starting value when constructing a tension diagram in the process of traction calculation of the conveyor. They are also useful for determining the parameters of transition sections of conveyor belts.
  Keywords: ленточный конвейер, тяговый расчет, конвейерные ленты, прогиб, физико-механические характеристики.

• EXPERIMENTAL VERIFICATION OF MODEL FOR OBJECT INNOVATION EVALUATION
  Authors: V.K. IVANOV, Cand. Sc.
  Abstract: The article discusses the approach for evaluating the innovation index of the products and technologies. The evaluation results can be used to create a warehouse for the object descriptions with significant innovation potential. The innovation index calculation model is based on the concepts of novelty, relevance, and implementability of the object. Formal definitions of these indicators are given and a methodology for their calculation are described. The fuzzy methods to process (incomplete) data from numerous sources and to obtain probabilistic innovation assessments are used. The experimental data of the model verification including the calculations of local criteria and global additive evaluation criterion are presented. The cyclical nature of dynamic changes in indicators, their interdependence and some general features of product promotion have been established. The obtained experimental data check with expert judgement of the investigated products. The analysis of the local criteria used in the research affords ground to assert about the correct use of the additive n-dimensional utility function. The adequacy of assumptions and formal expressions that are used in computational algorithms for selection information for data warehouse is confirmed.
  Keywords: data warehouse, innovation, additive criterion, utility function, search query.

• PROBLEM OF FUNCTIONAL READINESS ASSESSMENT FOR MILITARY AUTOMATED CONTROL SYSTEM
  Authors: S.M. KARDASH, Cand. Sc., A.V. DEMIDOV, Adjunct
  Abstract: It is substantiated the necessity of evaluating the functional readiness for complexes of automated control systems (ACS) with the following factors: reliability of technical means, reliability of control programs (software reliability), reliability of the technical system taking into account the activities of combat control operators.
  Keywords: air-space forces, automated control system for military purposes, functional readiness.

• EVALUATING THE QUALITY OF SOLUTIONS IN THE DESIGN OF MACHINING OPERATIONS
  Authors: A.N. BOLOTOV, Dr. Sc., G.B. BURDO, Dr. Sc.
  Abstract: The paper shows a method for evaluating solutions in the design of technological processes. The method is applicable to the synthesis of technological processes using the method of multivariate decomposition, when the design is performed at several levels. Selecting solutions in accordance with the proposed criteria allows you to drastically reduce the number of viewed options for synthesized solutions, and purposefully manage the design process.
  Keywords: machine-building production, decomposition, optimality criteria, target function, technological process, computer-aided design of technological processes.

• SYSTEM ANALYSIS IN SOLVING THE PROBLEMS OF PRODUCTION SAFETY IN ERGATIC SYSTEMS
  Authors: N.M. PUZYREV, Cand. Sc., D.V. MARTYNOV, Cand. Sc., N.B. BARBASHINOVA, Lecturer
  Abstract: Creating safe working conditions in ergatic systems is possible only when taking into account a large number of elements, factors, conditions, restrictions that make up a complex interconnected system, without analysis of which it is impossible to achieve the desired result in solving problems of ensuring or increasing the required level of industrial safety during design, creation, operation, maintenance of technical devices involved in industrial production. The characteristic of system analysis methods is given, ways of solving applied problems of ensuring safety at work using the preferred methods of analysis are proposed.
  Keywords: system analysis, ergatic system, industrial safety, hazardous production factor, harmful production factor.

• ANALYSIS OF MODERN THREATS TO INFORMATION SECURITY IN A MILITARY AUTOMATED CONTROL SYSTEM
  Authors: S.G. KRASNOV, Adjunct
  Abstract: It is considered the classification of threats to information security, presents the most likely threats that can be applied by the enemy to automated control systems for military purposes, and the possible consequences that can occur in this case.
  Keywords: information security, threats to information security, military automated control systems, information protection, unauthorized access, unauthorized impacts, computer attacks.

• SECURITY MODEL WITH THE "TIMING" MECHANISM OF THE INFORMATION SECURITY SYSTEM
  Authors: Yu.V. POLYANSKAYA, Engineer, A.V. MOROZOV, Dr. Sc., S.G. KRASNOV, Adjunct
  Abstract: The main point of the new approach to security should be the development of effective security models that are adequate to the current level of development of software and hardware, as well as the possibility of flexible security management depending on the requirements, acceptable risk and resource consumption. The task of the kernel integrity control subsystem is to ensure the security of the system during its operation and detect incorrect interference of system subjects in its operation. The system integrity control subsystems are based on two main components: static and dynamic. The frequency of the kernel integrity control subsystem actuation determines the time that the system will be in the "information leak" state in the event of a violation of the system integrity. There are two approaches to determining the time interval T: the first approach is characterized by minimizing the loss of system performance due to the presence of the kernel integrity control subsystem in the system, the second approach is characterized by the fact that it provides a higher level of security in case of possible losses of system performance.
  Keywords: security model, kernel integrity control subsystem, statistical subsystem, dynamic subsystem, the subsystem response period.

• IMPROVEMENT OF EDUCATIONAL ACTIVITIES FOR THE HIGHER MILITARY EDUCATION INSTITUTION ON THE BASIS OF INFORMATION TECHNOLOGIES OF SIMULATOR TRAINING
  Authors: V.A. MORENKOV, Cand. Sc., I.S. ZHIKHAREV, Adjunct
  Abstract: The analysis of educational activities in higher military educational institutions is carried out; the influence of information technologies on the development of automated control in the army is shown. The problems, affecting the level of students' practical training on automation systems, are identified, the ways to overcome them with the use of information technologies implemented in the educational activities of higher educational institutions and troops are outlined.
  Keywords: utomation solutions complex, information technology, simulator, practical level of training.