Machines. Technologies. Materials.
Vol. 12 (2018), Issue 9

Table of Contents

  • THE CONCEPT OF SYNTHESIS OF MOBILE ROBOTS

    pg(s) 344-347

    The paper proposes three basic principles for the synthesis of mobile robots: the accumulation and conversion of energy, the integration of motion drives and the use of a generator of reactive pneumatic traction. These technical solutions allow robots to navigate on surfaces of arbitrary orientation in different coordinate systems. The implementation of these principles contributes to reducing the total power of the drives and increasing the reliability of holding robots on the surface of arbitrary orientation in the technological space. The results of mathematical modelling of constructive and technological parameters of mobile robots are described.

  • IMPACT OF THE SPEED OF SLIDING OF FRICTION LINING ON THE TRIBOLOGICAL PARAMETERS OF FRICTION CLUTCHES OF MOTOR VEHICLES

    pg(s) 348-350

    Friction clutches are mechanisms placed between the engine and the gearbox and are used to transmit the torque from the engine of the vehicle to the transmission. The clutches should provide start and stopping of the vehicle without vibration and need to have a certain lifetime. The tribological parameters of the linings in these clutches depend on several factors: the quality of the linings, the conditions of the test (exploitation), the temperature between the friction surfaces, the specific pressure between the friction surfaces, the speed of sliding of the friction linings, the number of turns on the clutch, etc. In this paper, will be analyzed the impact of the speed of sliding of friction linings on the tribological parameters of the linings.

  • EMBEDDED MICROPROCESSORY SCADA SYSTEM FOR SUPERVISORY, CONTROL AND DATA ACQUISITION IN THE PROCESS OF PURIFICATION OF GASSES IN FERRONICKEL FACTORY

    pg(s) 351-354

    In this paper is presented development and implementation of embedded microprocessory SCADA system in factory for production of Ferro-Nickel. In the process of refining of the molten metal are released huge amount of hot gasses that should be purified before letting them to the atmosphere. The project is to change old system of rellay logic and separately located indicators and controllers with centralised SCADA system with PLC and HMI interface, to monitor and control the work of gas Scrubbers and venting system. The paper presents SCADA system functionality and the advantages from the new digital over the old analog equipment.

  • THE CONCEPT OF KNOWLEDGE MANAGEMENT IN THE REGION AS A BASIS OF ESTIMATION OF CONDITIONS OF INNOVATIVE ACTIVITY

    pg(s) 355-357

    Innovative activity in a region is considered in terms of the knowledge management concept. An approach is proposed for assessing the conditions for innovative activity on the basis of three groups of indicators: indicators, characterizing the financial conditions for innovative activity; indicators, characterizing human resources; indicators, characterizing the knowledge generation sources in a region and their accessibility. The obtained integral estimation allows us to classify regions and, on this basis, differentiate innovation policy.

  • USING PATTERNS IN ARCHITECTURE OF SOFTWARE ENGINEERING

    pg(s) 358-361

    Architecture patterns help define the basic characteristics and behavior of an application. Some architecture patterns lend themselves toward highly scalable applications, whereas other architecture patterns naturally lend themselves toward applications that are highly agile. Knowing the characteristics, strengths, and weaknesses of each architecture pattern is necessary in order to choose the one that meets your specific business needs and goals.As a software architect, you must always justify your architecture decisions, particularly when it comes to choosing a particular architecture pattern or approach. The goal of this report is to give you enough information to make and justify that decision.

  • CALCULATION OF PARAMETERS OF TENSELY DEFORMED STATE OF DISK PIEZOELEMENTS WITH SURFACES PARTIALLY COVERED BY ELECTRODES

    pg(s) 362-366

    A mathematical formulation of the boundary problems of mathematical physics is made, sequential solution which allows describing the stress-strain state and the transfer characteristics of the piezoelectric elements with surfaces partial covering by electrodes. The set of formulated boundary problems makes mathematical content of energy-power method of analysis of the physical condition of the piezoelectric elements in the regime of forced oscillations under the influence of an external source of electrical energy. The proposed sequence of computational procedures can be used in the study of forced oscillations of microelectromechanical structures.

  • KNOWLEDGE, CREATIVITY AND INNOVATION IN KNOWLEDGE SOCIETY FORMATION

    pg(s) 367-370

    The concept of a society of knowledge is considered in the article. It is proved that the knowledge economy, the core of which is the creative economy, provides the formation of a knowledge society. Today, the cultural industry, or creative economy, is considered as a new type of industry. The essence and peculiarities of the creative potential of a specialist are determined. The forecast indicators of Ukraine’s creative potential development are presented. It is revealed that modern problems of economic development are connected with the intellectualization of labor, giving the highest priority to the processes of producing new knowledge. To achieve predictive indicators of intellectual and creative activity in Ukraine, it is necessary to fulfill certain tasks.

  • SUPERPARAMAGNETIC PROPERTIES IN LANTHANUM STRONTIUM MANGANITES DOPED WITH ZINC

    pg(s) 371-373

    Lanthanum strontium manganites, doped with zinc have been studied by magnetic resonance. In the paramagnetic phase, regions with a ferromagnetic order with superparamagnetism properties are observed. Using the theory of Raikher and Stepanov for superparamagnetic particles, the analysis of the temperature dependence of the magnetic resonance linewidth and resonance field was performed. This analysis allowed to estimate the size of ferromagnetically correlated regions and the magnitude of the magnetic anisotropy.

  • CALCULATION OF TEMPERATURE DEPENDENCES OF THERMAL EFFECTS AT COOLING OF METAL ALLOYS

    pg(s) 374-377

    A method is proposed for determining the temperature dependences of thermal effects (the amount of heat released when the temperature changes) based on data on the temperature-concentration dependences of the free energies of the phases of metallic systems. These dependences are necessary for modeling of the processes of crystallization of alloys. They make it possible to obtain temperature dependences of the dimensions of the thermal effects without introducing the results of measurements of direct calorimetry. The peculiarity of calculating of the temperature dependences of thermal effects upon cooling of binary metal systems from the liquid state to room temperature (including crystallization) is shown using the example of the alloy of the system Pb-Sn.

  • RULE-BASED MAMDANI-TYPE FUZZY MODELING OF PERFORMANCE OF HYDROXY (HHO) DRY CELL WITH 12×12 PLATE COMBINATION

    pg(s) 378-381

    The fossil fuels and the natural gas reserves that have undertaken the role of the locomotive of the industrial period are limited. It is also the biggest factor in environmental problems. All these reasons lead to the need for alternative fuels or resources. Hydrogen is the candidate to be one of these alternatives; is an unlimited clean and efficient fuel. Hydrogen may assume the role of carrier in the process of storage of other alternative energy sources. Today, interest in hydrogen energy is increasing. One of the reasons for this is that hydrogen can be produced from renewable energy sources such as water, biomass, wind and sun as well as hydrogen from primary energy sources. There is no polluting gas emissions when hydrogen is used as fuel. The HHO dry cell is a device that converts water into HHO (oxyhydrogen) gas. In this study, performance of HHO dry cell with 12×12 plate combination was experimentally investigated and modeled with a Rule-Based Mamdani-Type Fuzzy (RBMTF) modeling technique. Input parameters are; plate number, time, current; output parameter is mass flow rate. The coefficient of multiple determination (R2=98.5) for the mass flow rate. RBMTF results indicated that RBMTF can be successfully used in HHO dry cell with 12×12 plate combination.

  • ADHESION AND PHYSICO-MECHANICAL CHARACTERISTICS OF COATINGS OF CHROMIUM CARBONITRIDE, GENERATED ON STEEL SUBSTRATES

    pg(s) 382-385

    In the present work, the adhesion and physico-mechanical characteristics of heat-resistant vacuum coatings formed on steel substrates are investigated. An increase in the values of adhesion and physico-mechanical parameters of coatings formed from multicomponent compounds is established. The tribotechnical characteristics of coatings based on chromium carbonitride have been studied.