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«Working out of power supply systems with unclear regulators in the chains of network hybrid filters»

Faculty
Electronics and IT Faculty
Department
Industrial Electronics Department

Leader: PhD in Sciences, Professor Denysov Y.O.,

Performers: PhD in Sciences, associate professor Velihorskiy O.A, PhD in Sciences, associate professor Zarovs’kyi R.V., post- graduate student Husev O.O., Master student Chub A.I., Master student Homelskyi K.K.

Purpose of working out: creation of the systems of power electronics with high dynamic and power descriptions.

Scientific results

It has been worked out and an experimentally tested methodological base for creation of devices of reactive-power compensation of hybrid filters in an electric network, with adaptation to the electrical noise , that allows to compensate the wide spectrum of reactive-power in a network. The method of synthesis of controlled systems for operation of hybrid filters with unclear regulators is developed. The mathematical models of hybrid filters and transformers which increase stress are designed. The method of drafting table of working instructions of unclear regulator of control system by a hybrid filter is obtained.

Practical results

It has been worked out the model of operating system for hybrid filter with an unclear regulator. An effective methodological base for development and planning of the energy effective systems of transformation of electric energy with hybrid filters is created and experimentally tested.

The economic attractiveness

The use of the suggested methods of controlling hybrid filters will allow considerably (to 5-7 times) to decrease the losses of electric energy, and promote energy effectivness of power supply systems , by power from 0,5-10 kW.

Practical use

The results of developments can be used on power-consuming factories and on energy-dissipating enterprises. The results of researches are inculcated in an educational process and in designing developments of region enterprises .


«Optimization of non-perfect powerful composite constructions
working at the dynamic loadings»

Faculty
Department
Mechanical Engineering
Theoretical and Applied Mechanics Department

Leader: PhD in Sciences, Professor Dubenets V.H.

Performers: PhD in Sciences, associate professer Savchenko O.V., junior scientistYakovenko O.O., junior scientist. Ivashko E.O., post-graduate student Savchenko I.M.

Purpose of working out : working out of the optimum designing composite constructions and materials, working at the dynamic loadings and creation of the methodology of designing of constructions with maximal damping.

Scientific results

The result of scientific researches is complex method of the optimum designing of composite constructions, intended for work in the conditions of the dynamic loadings. The number of new models and methods of analysis of vibration constructions with elastic materials is offered , in particular:
- element models of composite constructions;
- methods of calculation of effective characteristics of composite materials of regular structure and parameters of vibrations of constructions from such materials;
- methods of global optimization for the multiextreme tasks of optimization of constructions from the reinforced materials;
- methods of multicriterion optimization for the account of a few competitive requirements;
- methods of minimization of amplitudes of vibrations at vibrations with the wide frequency spectrum.

Economic attractiveness

The results of researches will promote in wider introduction in practice of designing of constructions of composite materials and use of methods of the optimum designing of constructions with given parameters.

Practical results

The results obtained during the research work can be used for the automated designing of constructions in machine-building, aerospace, aircraft, shipbuilding industries at creation of robots and manipulators, aerospace and shipbuilding elements of constructions, thin-walled constructions, working at the dynamic loadings.


«Research-and-working out of low temperature technology
of tungstencobalt alloys diffusive connection »

Faculty
Department
Кафедра 
Кафедра зварювального виробництва

Leader: PhD in Sciences, Professor . Kharchenko H.K,

Performers: PhD in Sciences, associate professer, Novomlynets O.O., PhD in Sciences, associate professor, Oleksienko S.V., PhD in Sciences Prybytko I.O., tutor Rudenko M.M.

Purpose of working out: research and working out of technology of the diffusive welding of tungstencobalt alloys at temperature to 973 K.

Scientific results

It has been worked out:
- the new method of the diffusive welding of metallic details through a layer;
- the technology of low temperature connection of tungstencobalt of stiffness alloys; the effect of which consists in localization of thermal and mechanical energy in a joint due to the use of heating by an impulse of current and intermediate perforated layer with high electric resistance;
-the scheme of welding of diamond hard-alloy plates with stiffness alloy with the use of the special equipment, which limits heating of diamond layer higher than 973К;
-the technology of welding diamond hard-alloy plates (chisels) with stiffness alloys cutting and boring instruments with improved operating properties and term of capacity, which will be competitive both at the domestic market of Ukraine, and abroad.

The economic attractiveness

The use of the worked out welding technology will allow to make cheaper hard-alloy instrument for the processes of metal-working and drilling tool.

Practical results

The results of research can be used in the technological processes of making hard-alloy instrument for the processes of metal-working and drilling tool with improved operating properties and higher term of capacity, which will be competitive both at the internal market of Ukraine, and abroad.

Offered for applying in industry on the basis of economic agreements with the enterprises of instrumental and machine-building industry of Ukraine and neighbour countries.


«Theoretical bases of creation of hydraulic supports of high- speed spindle knots
with control system in thick liquid tape»

Faculty
Department
Mechanical Engineering
Automobile and Machine- Engineering Integrated Technology Department

Leader: PhD in Sciences, Professor . Sakhno Y.O.,

Performers: PhD in Sciences, associate professor Fedorynenko D.Y., PhD in Sciences Boiko S.V., tutor Volik V.S.

Purpose of working out: working out of new constructions of hydraulic supports of high- speed spindle knots of metal-cutting machine-tools.

Scientific results.

It has been worked out:
- the new construction of the operated hydrostatical bearing, which can be used on littleviscid working fluids as supports of high- speed spindle knots which work with the insignificant losses of power at frequencies of rotation of over 10000 min.- simultaneously providing high inflexibility of knot;
-adjusting of regulating gap in bearing allows to operate the indexes of inflexibility and shake-proofness of support;
-the new method of gap operating in radial hydrostatical supports (patent ¹# 82425) on the basis of the use of mechanism with three-lobe cut grip;
-the suggested method of operating allows without stages to change a static radial gap in support within the limits of 10-40 mkm depending on loading on the spindle knot of machine-tool;
-the new system of automatic control in thick of lubricating tape which influences on centring of spindle and exact treatment on a machine-tool with hydraulic supports.

Practical results

The results of research will be suggested to the machine-building enterprises of metal-working industry. The executed work has competitive results concerning the lathe and polishing groups of machine-tools with hydrostatical supports.

The worked-out structural schemes of operating machining, lathes and polishing machine-tools , including machine-tools with CHPK, with the operated spindle hydrostatical supports.

Economic attractiveness

Technical solutions concerning the increase of working speeds of spindles on hydrostatical supports, which will allow to promote the productivity of treatment cutting due to reduction of artificial time which stipulates the decline of eventual machine-building unit cost are suggested .

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