Proceedings of National Aviation University

COMBINED BIOMASS UTILIZATION SYSTEM

2021-10-26T11:08:30+03:00

The purpose of this study is to analyze existing technologies and optimize their operation in a closed-loop production and use of biomass fuel based on existing chemical-biological technologies of biochemical processing of biomass and its anaerobic fermentation processes. The article presents a fundamentally new scheme of biomass utilization of different origins, the implementation of this scheme of utilization of household, sewage, industrial and technological biomass waste will solve simultaneously the problem of preserving the environment in an environmentally friendly condition, to obtain during processing energy sources thermal energy to ensure the flow of biochemical and thermal processes in the installation, and to produce pilot fuel for its use in the processes of heat production of decentralized heating systems and energy production of small and medium-sized settlements, private estates and cottages.

THE USE OF ALCOHOL ADDITIVES FOR ECOLOGICAL GASOLINE PRODUCTION

2021-10-25T15:20:54+03:00

The purpose of this article is to perform research to improve the stability, quality and efficiency of gasoline-alcohol fuel compositions, as well as obtaining high-octane gasolines corresponding to the modern standards with the addition of alcohols and their mixtures to these gasolines. Research methods: The article considers physicochemical methods for studying the stratification of alcohol-gasoline mixtures, determining the water content in them, as well as determining the octane number of alcohol-gasoline compositions. Results: The raw material base and possibilities of bioethanol production in Ukraine as an ecological additive to gasoline and as a way to increase their octane number were studied. Stratification temperatures of alcohol-gasoline mixtures and octane numbers of A-92 gasoline with different alcohol content were determined. Discussion: It is proposed to use higher concentrations of ethanol (bioethanol) in gasoline mixtures more than 40% of alcohol, because it does not require dehydration. It is proposed to use an additional fuel pump, which would work only for mixing the fuel mixture, to prevent stratification of the fuel-ethanol composition during its long-term storage in the car’s tanks.

THE APPLICATION OF PYROLYSIS GAS AS A FUEL FOR GAS TURBINE ENGINES FOR ELECTRICITY GENERATION

2021-10-21T13:58:36+03:00

Purpose: The purpose of this article is to show the opportunities of application of the pyrolysis gas as a fuel for gas turbine power plants based on decommissioned gas turbine engines, including those from aircraft – either turboprop or turboshaft, or both, and also those used on ground vehicles such as tanks and marine engines as well. Methods: The article describes the technology of pyrolysis of different materials for obtaining pyrolysis gas and its further application as a fuel for internal combustion engines was developed in the end of XIX century and was successfully applied for automobile, marine and railway locomotive piston engines till the mid ХХ century when large oil reservoirs were discovered all around the World. Results: the current research not only proves that there exists an economic benefit of application of pyrolysis technology even at nowadays, but also an ecological one, allowing getting rid of garbage Discussion: The proposed examples of successful pyrolysis technology application can be a good basis for further research of transferring modern engines to the pyrolysis gas fuels.

APPROACH TO EVALUATION OF THE APPLICATION AND EFFICIENCY OF STRATOSPHERE UAV

2021-10-21T13:27:14+03:00

The article considers the theoretical aspects of UAV research for flights in the stratosphere, analyzes the approaches to evaluating the use and effectiveness of UAVs. Measures have been developed to optimize the use of UAV data. The purpose of the article is to analyze the features of the development of methods for evaluating the effectiveness of stratospheric UAVs, as well as measures to optimize this category of drones

INTEGRATED ALGORITHM FOR COMPILINGAND ASSESSMENT OF DIRECT ROUTES RESTRICTIONS IN FREE ROUTE AIRSPACE OF UKRAINE

2021-10-21T10:58:24+03:00

The article describes the principles of acceptability assignment for direct routes restrictions in free route airspace of Ukraine for publication in Route Availability Document and further use by the Integrated Initial Flight Plan Processing System of Eurocontrol. The algorithms of correct generation of direct routes restrictions for the selected issues in a horizontal and vertical plane were proposed. As a main decision criteriafor these algorithms were chosen the shortest distance to the state boundary (in a horizontal plane) and space attitude (location) of aircraft (in avertical plane).

STRUCTURE AND REQUIREMENTS FOR A UNIVERSAL TRAINING DEVICE FOR UNMANNED AIRCRAFT COMPLEXES

2021-10-20T13:27:19+03:00

The problems of personnel training for the operation of unmanned aerial vehicles have been updated. The differences between the skills and abilities of personnel for manned and unmanned aircraft are highlighted. The widespread types of flight simulators are considered, their features are given. The basic schemes of application of linear and nonlinear mathematical models of formation (formalization) of knowledge, abilities and skills of the personnel taking into account absence / presence of updating of the information in the course of training are substantiated.
The basic modes of operation of USL, the universal simulator for training are specified. Emphasis is placed on the fact that USL is a partial case of an automated training management system (ACS), and a block diagram of training with it is given. The tasks that can be solved on a universal simulator and the requirements for software and hardware, automated workplace, digital sound, general software, peripherals, data exchange, digital video, user interface and webbased automated instructions are discussed in detail. The functions and structure of the universal simulator for training unmanned aircraft complex are presented.

HOW MIGHT ENTREPRENEURIAL ACTIVITIES AFFECT BEHAVIOUR AND EMOTIONS?

2021-07-26T15:53:27+03:00

It’s essential to comprehend individuals’ comprehension of what occurs in their brains. Given a writing survey of business enterprise brain science and conduct, and a particular featuring of the subarea’s identity, understanding, feeling, mentality, and self, this article exhibits an audit of this present field’s past and current issues points, speculations, and techniques. In the mix with review results from enterprise conduct scientists’ ebb and flow work and sentiments on the exploration boondocks in those angles, this article gives bits of knowledge and proposals to future research headings.

A PHOTOBIOREACTOR FOR MICROALGAE-BASED WASTEWATER TREATMENT

2021-07-26T15:31:01+03:00

Purpose and Objectives of the Work. This scientific article is devoted to creation of an advanced photobioreactor design for wastewater treatment from biogenic compounds. Research Methods are based on a systematic analysis of theoretical research, synthesis, anology and comparison. Research Results. As a result, the improved photobioreactor design was proposed, in which the application of new elements and connections reduces the required area for its placement, immobilization of microalgae in the working area and, as a result, reducing the working area, the ability to quickly replace the sleeves of the working area, covered with sediment inside, and, as a result, reduce labor costs and downtime of the photobioreactor. Discussion. The problem is solved by the fact that the photobioreactor is made in the form of a transparent flowing rectangular open-topped tank, inside of which are vertically attached to the bottom of the tank by quick-release fasteners transparent flowing flexible hoses, to which at the bottom by means of non-return valves are connected pipelines for wastewater and microalgae supply and tubes for carbon dioxide supply and are connected by means of shut-off valves pipelines for drainage of a mixture of microalgae with residual wastewater, and in the upper hermetic part, where there are valves for drainage of accumulated gases , while the pipeline for the purified wastewater discharge is connected to a guide tray purified wastewater supply inside of a flowing rectangular open-topped tank, and at the outlet of the pipeline for drainage of a mixture of microalgae with residual wastewater is a microalgae separator to separate return and excess biomass. Conclusion. The proposed construction of photobioreactor can have good perspectives to be use in communal services for sewage water purification from biogenic compounds.

COMPLEX SOLUTIONS FOR SUSTAINABLE DEVELOPMENT OF DEGRADED LANDS OF THE KHERSON REGION

2021-07-26T13:34:24+03:00

The sustainable development is the prevailing approach to the use of natural resource potential. The degraded agricultural areas loose their economic value and raise a wide range of environmental concerns. The Kherson region is one of the most overexploited territories in Ukraine, which is characterized by diverse soil-climatic conditions. It was offered to use these lands for cultivation of energy crops. The comparative analysis demonstrated that algae and rapeseed are the most efficient alternatives which are able to complement each other and form a perspective energy mix.

GENERATION OF SYNTHETICAL MEDICAL DATA BY MDR-ANALYSIS

2021-07-26T13:04:25+03:00

Purpose: The purpose of this article is to outline an algorithm for generating synthetic medical data in order to augment small samples of data. Methods: To achieve the research goal, methods such as: correlation analysis (to identify significant variables and the relationships between them), MDR analysis (to build logical chains of relationships between medical data), and regression analysis (to model medical data variables to use this to generate synthetic data) were used. Results: A database of heart failure patients that is publicly available was used to test the developed algorithm for generating synthetic medical data in action; as a result, statistical relationships between data were found and used to build linear regression models. Discussion: The proposed algorithm allows, with a few simple, yet important actions, to perform the generation of medical data, which makes it possible to obtain large data sets that can be used to implement machine learning methods in any tasks related to medicine.

REGULATION OF THE RATE OF GEL FORMATION BY ADDING CHEMICAL COMPOUNDS INTO SILICATECOMPOSITIONS

2021-07-19T15:27:40+03:00

Purpose: The purpose of this article is to determine the dependence of the rate of gel formation on the type of reagent-inhibitor of the gel formation process, and to study the kinetic dependences of gel formation of silicate compositions in the presence of compounds that regulate the rate of gel formation. Research methods: Direct and reverse titration, potentiometric titration, pH-metry, determination of the dynamic viscosity on a rotational viscometer, axial compression method to determine the elastic modulus were used to study the possibility of using chemical reagents as gelation inhibitors. Results: The possibility of using inorganic and organic additives to slow down the gel formation process and the effect of these additives on the strength of the gel, their thermodynamic parameters have been researched. Discussion: The adding of organic acids into the silicate composition as "crosslinking agents" slows down the gel formation process, while replacing hydrochloric acid with other gel acids that slow down the gel formation process does not lead to a decrease in the strength characteristics of these systems compared to the standard. It was found that with an increase in the gelation time, the strength of the gels decreases, and the syneresis increases; the adding of inhibitor additives insignificantly worsens the filterability of silicate compositions, which in general have bad filterability, leading to an increase in resistance during filtration at the inlet section of the sample. Observations have shown that the addition of additives-inhibitors does not affect the thermal stability of gels, regardless of the additives' nature.

DATA STRUCTURE OF MEDICAL INFORMATION ORGANIZATION AND SELECTING OPTIMAL PATIENT TREATMENT STRATEGIES

2021-07-19T10:19:51+03:00

Purpose: The purpose of this article is to develop a clinical information storage and medical decision support system for daily use by physicians during their work with patients. Methods: The article considered approaches to achieve the research goal through the creation of a backend on Django Rest Framework, as well as the application of the simplex method to perform treatment optimization. Results: A server-side software product was obtained, where a special database was implemented, which takes into account the requirements for the data structure of the organization of medical information, and a module for selecting optimal treatment strategies for patients was created. Discussion: The conducted research allowed us to obtain a prototype of medical information system, which will be useful due to its versatility in the data structure of the organization of medical data and the use of machine learning methods to optimize treatment strategies.

THE FUTURE ATCO OFFICERS’ INDIVIDUAL PROFILES FORMING

2021-07-19T09:53:45+03:00

The aim: The aim of this article, taking into account aviation personnel professional training evolution and information technologies development, is a presentation of approach to problems solving, relating to future air traffic controllers training personalization by means of training individual profiles forming, taking into account their cognitive characteristics. The method: The approach, which is based on selected criteria – oriented test, by means of which the proper training styles defined, is described in this article. The results: depending on the defined training style, the variants of instructor’s guidance of knowledge, skills and habits acquisition process will be defined. The discussion: In future it provides the possibility to project the training packages according to ‘pupils’ individualized cognitive abilities, relating to reception of professionally oriented training materials.

CFIT PREVENTION WITH COMBINED ENHANCED FLIGHT VISION SYSTEM AND SYNTHETIC VISION SYSTEM

2021-07-01T14:25:46+03:00

This paper aims to combine two vision systems as a new technology to suggest the improvement in the continuing problem of Controlled Flight into Terrain (CFIT) accidents. A combined enhanced flight vision system and synthetic vision system seems to hold the solution, while it unhesitatingly accommodated to the commercial and General aviation instrument environment if pilots are getting minimal instrument training. This research shows the benefit of combined enhanced flight vision and synthetic vision systems based on analysis of the accident that occurred in 2013 on approach at Birmingham-Shuttlesworth International Airport. It is shown that the use of a combined system, could have prevented this accident. The head-up display is taken to facilitate this technology to the pilot to be able to see and read accurately using sky lenses.

FEATURES OF THE USE OF NEURAL NETWORKS IN THE DESIGN OF UAVS FOR FLIGHT IN THE STRATOSPHERE

2021-07-01T10:04:07+03:00

Problems of application of neural networks during UAV design, and also questions of development of methods and algorithms of synthesis of neural network.

OXIDATIVE STABILITY OF LUBRICATING MATERIALS WITH FULERENE NANOADDITIVES

2021-05-24T11:37:56+03:00

Purpose: The purpose of this article is to investigate the possibility of using fullerene additives to fuels and lubricating materials for the improvement their oxidative stability and to determine the concentration of nanoadditives in hydrocarbon solutions. Research methods: Methods of increasing the oxidative stability of Castrol Magnet SAE 5w-30 oil by adding fullerene C60 and determination the content of nanoadditives in the hydrocarbon liquids were considered in the article. Results: The optimal concentrations of fullerene additives are determined, the method of photoelectrocolorimetric determination of their concentrations in lubricants is developed, the experimental data of optical properties of C₆₀ solutions are obtained and the amount of fullerene in solution is calculated. Discussion: It is proposed to use fullerenes as an antioxidant additive, which significantly improves the thermal oxidative stability of oils and the method of determining of fullerene content.

MICROBIOLOGICAL CONTAMINATION OF MOTOR FUELS: ANALYSIS AND IDENTIFICATION IN FUELLING COMPANIES

2021-05-24T11:37:56+03:00

Purpose: the analysis of fuel transport systems and ground equipment of the fuel supply company has shown that «free» water is present in fuels, also solid contaminations, as rust and dust, and microbiological pollution. The problem of microbiological contamination is actually because the quality of fuel and operational reliability of equipment is deteriorating. This article shows that the main consequences of microbiological damage to hydrocarbon fuels are microbiological corrosion of parts and contamination. This leads to premature clogging of the filters. Also the microorganisms-destructors of hydrocarbon fuels, the main reasons of their presence in fuels, the basic technological operations in the ground fuel enterprises where microbiological pollution is produced most often are specified. Features of development of microbiological pollution of fuels for aviation and land transport are considered. Methods: express methods and long-term methods are used to determine microbiological contaminants. Resistance to microbiological damage to fuels in this work was determined using the method of MicrobMonitor 2, which is recommended by IATA and ICAO. Results: the research of Jet-A1 fuel samples taken from the airport tanks was performed. Most of the samples examined showed the presence of microbiological inclusions. The test samples show microbiological damage to the fuel by different types of microorganisms. Direct seeding methods were used for identification. Interpretation of test results was performed according to the MicrobMonitor2 methodology. The use of measures such as: timely conducting a control inspection, to remove «free» water from fuel tanks, periodic monitoring of microbial fuel damage at all stages of its operation, use recommended methodology and to develop new methods of rapid diagnosis can significantly minimize the level of risk.

THE STUDY OF DEPENDENCE OF SILICATE-POLYMER SOLUTIONS ON COMPONENTS CONCENTRATION IN THE COMPOSITION

2021-05-24T11:37:56+03:00

Purpose: The aim of this article is to study the possibility of xanthan usage as a polymer additive in silicate-gel solutions when creation compositions for enhancing oil recovery. The dependence of the time of gel formation of the silicate-polymer compositions and the pH of the gel-forming solution from various concentrations of xanthan and polyacrylamide was analyzed. Research methods: Direct and reverse titration, potentiometric titration, pH-metry, determination of the dynamic viscosity on a rotational viscometer, axial compression method to determine the elastic modulus were used to determine the possibility of xanthan usage as a polymer additive instead of polyacrylamide. Results: Such investigations as determination the influence of polymer type and concentration on the elastic modulus and syneresis of compositions in the gel state have been performed to determine the possibility of xanthan usage as a polymer additive of gel-forming composition and influence of this polymer on the dynamic viscosity of gel-forming compositions, gel strength, stability in time, the possibility of gel destruction. Discussion: Xanthan investigation as an alternative polymer has shown the perspective of its usage in the oil recovery industry. The environmental friendliness of technologies developed with the use of xanthan, which is safe for the environment, does not lead to an irreversible change in the reservoir properties of the formation. The lower molecular weight of xanthan in comparison with synthetic polymers determines the improved filtration properties of xanthan solutions, especially in low permeability conditions, which also makes it possible to carry out deeper treatments of the formation.

MODELLING THE RIGID AIRFIELD STRUCTURE OPERATION WITH A REINFORCEMENT LAYER OF MODIFIED CONCRETE

2021-05-24T11:37:56+03:00

The purpose of this article is to present the results of the study of the operational suitability of the existing induced airfield coating by experimental and theoretical methods. Based on the analysis of the results of the research, it was determined that the material that provides performance characteristics, namely: crack resistance, tensile strength, impact strength, abrasion resistance - is a modified concrete, i.e. concrete with additives that have a positive effect on the structure and operational properties. This paper presents the results of studies of the reinforcement layer made of concrete with the introduction of the most common modifiers of polymeric substance (polymer-cement RCC - Polymer Cement Concrete) and basalt chopped fiber - fiber (basalt fiber concrete FRC - Fiber Reinforced Basalt concrete).

EXPERIMENTAL STUDY OF THE STABILITY OF REINFORCED CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION

2021-05-24T11:37:56+03:00

Purpose: Show the real effect of initial imperfections on the upper critical load of cylindrical shells. Method: Analysis of experimental data. Results: This article presents the results of experimental studies of the stability of cylindrical shells reinforced with stringers with initial imperfections in shape under axial compression. A detailed analysis of the experimental data has been performed. A conclusion is made regarding the stability of cylindrical shells. Recommendations on the directions of further research are given. Discussion: The large difference between the experimental and theoretical axial critical loads of cylindrical shells made researchers look for the reasons for this difference. It was considered that one of the main reasons is the presence of initial imperfections in the shells. Then doubts arose as to the veracity of this statement. There were conflicting opinions. It became necessary to find out the real influence of the initial imperfections on the stability of cylindrical shells.

APPROBATION OF FUEL CATALYSTS FOR AIRCRAFT ENGINES

2021-05-24T11:37:56+03:00

A study of the impact of fuel catalysts of the Ukrainian company "Auto-Eco-Titan", which were previously tested on reciprocating internal combustion engines of various modes of transport (road, rail, maritime) and showed a significant improvement in technical, economic and environmental performance. The possibility of using these catalysts in gas turbine aviation has been studied on aircraft gas turbine engines.

FLIGHT OPERATIONS MANAGEMENT SYSTEM ADAPTATION TO FUNCTIONING IN INCOMPLETE INFORMATION CONDITIONS

2021-05-24T11:37:56+03:00

Purpose: The purpose of this article is to present a new approach of Airlines Flight Operations Management System adaptation to functioning in incomplete information conditions. Methods: The article describes two runtime methods which increase the adaptation degree of Airlines Flight Operations Management System to functioning in incomplete information conditions, such as: exception handling and Quality of Service management. Results: The Airlines Flight Operations Management System adaptation overall architecture is given and their components relationships are described. Discussion: The proposed new approach will allow to adapt the Airlines Flight Operations Management Systems’ architecture to functioning in a high degree of uncertainty and incomplete information conditions.

THE FREE ROUTE AIRSPACE UKRAINE IMPLEMENTATION CORNERSTONES

2021-05-24T11:37:56+03:00

The article describes the scope of problematic issues (cornerstones) arising from fragmental processes of Free Route Airspace implementation on regional level in European airspace. Complex processes of step-by-step integration of national Free Route Airspace areas into greater regional Free Route Airspace areas, principles of gradual improvement of air traffic flow and capacity management on tactical level and optimisation of European fixed air traffic services route network are analysed and possible solutions are proposed.

Modem information technologies in a foreign language course for the engineering-profile students

2021-05-24T13:47:22+03:00

The opportunities of usage of modem personal computers and information-communicative technologies closely associated with them (first of all - Internet) for foreign language teaching of engineering s considered. Large possibilities, real prospects and features of practical application of new teaching in special content-based foreign language curricula are discussed, that are based on usage in didactijc the authentic materials directly relevant to technical speciality of students.

THE LATEST CHALLENGES FOR HIGHER EDUCATION INSTITUTIONS

2021-05-24T13:47:22+03:00

The beginning of a new millennium coincided with the period of renovation and reforms of universities. Universities should be the leaders and help the society to adopt new charac eristic elements of learning and to become a learning society. Aviation is the leading field where the modern knowledge and advanced research are applied. It the article an experience of the Lithu mia is analysed, Lithuania being a small country boasts a rich tradition in aviation and strives to par, icipate in this area of study and research.

Athens connections associated with equipped distributions of three-composition distribution of athens space

2021-05-24T13:47:22+03:00

The differential geometry of multicomponent distributions of multidimensional spaces is considered. It is established that in the case of invariant normalization of the basic distribution, affine connections are determined internally by the three-component distribution in the main stratified variety. The components of the tensor of the curvature and torsion of these connections are found.

Effects of synergism in mixes of surfactants

2021-05-24T13:47:22+03:00

Phenomenons of synergism in mixes of surfactants were researched. Reasons of effects of synergism in mixes of surfactants may be various. It was determined that phenomenon of synergism may be obsen ed in mixes of surfactants those are different in their electric nature, in geometric sizes (consist of high-molecular and low-molecular surfactants), in a mechanism of does of individual components in mixes on a moti эп of separate electrochemical reactions of metal’s corrosion (mixes of no organic passivators and adsofptive organic surfactants; mixes those provide inhibition of anodic reaction (ionization of metal) and accele ating of cathode reaction). Super additive intensification of surfactant’s does in mixes due to formation of si rface layers with high, near limited extent of surface’s infill was observed. This point of view is confirmee with the same character of surface activity on the interfaces solution-air, solution-mercury, and solution solid metal for surface-active cations and anions, their mixes. Surface activity increases due to arising of attr; ictive interaction among ions with different charges ((+) and (-)) instead of repulsive interaction among ion: with the same charge ((+) and (+) or (-) and (-)).

Means of artistic expressiveness in advertisement

2021-05-24T13:47:22+03:00

In the given article is underlined topicality of the meaning of optimum means of artistic expressiveness in creation of the effective advertisement. A wide spectrum of both stable and the newest means of artistic expressiveness that are used according to results of marketing research and the advertisement tasks aiming at the improvement of its artistic and aesthetic qualities is analysed.

Falling radionuclides activity calculation in circumstances of wreck on atomic reactor

2021-05-24T13:47:22+03:00

The methodics of falling radionuclides activity calculation and equal radiation dose in the rad aactive contamination zone is represented asa a function of total and individual radionuclides impact. The equation for analising the speed of falling of radionuclides activity in time is derived.

Effect of processes of cluster formation of components on mechanical and electrical properties of polymeric composite systems

2021-05-24T13:47:22+03:00

A study was made of the purposeful regulation of mechanical and electro-physical properties of composites systems: polyethylene - exfoliated graphite. The contents of the composite materials changed fr m 0 up to 1 of the exfoliated graphite part. The results obtained were interpreted within the scope of he percolation theory. It has been established that, depending on the percolation process characteristic of the giwen polyethylene and exfoliated graphite cluster structure, the polymer-graphite system can have one or two critical concentration of the percolation threshold, where a sharp change in the mechanical and electro-physical properties takes place. The reinforcement effect for a specimen of the composite material has been shown to depend on exfoliated graphite content, the structure of its clusters and adhesion strength betwi en components. The results obtained basic principles of the optimal structure formation of composite mater tls were suggested to ensure low values electro-physical properties and high strength characteristics.

The research of an isolation breakdown of lights aerodrome networks

2021-05-24T13:47:22+03:00

On the data of the normative documents and inservice experience parameter of diagnosing - isolation cable networks of aerodrome lights concerning ground is analyzed. The physical model of an insulation breakdown of these networks is investigated. The technique of definition minimum acceptable values of this parameter is offered.

Improvement of aviation pulse lighting systems

2021-05-24T13:47:22+03:00

The modernization of aircraft pulse beacons for the essential increase of their effectiveness has been analyzed.

Quantitative estimation of coagulation in cleaners of inertial type

2021-05-24T13:47:22+03:00

Calculations of a constant of coagulation between particles of pollution of the different sizes in an internal cleaner of liquids are given. It is shown, that coagulation practically possible only between particles of pollution in the size d = 0,05 sm with particles of other sizes, and reliability of coagulation lays in a ran] e 1,47-29,5%.

A theoretical aspect of saw-timber high-speed drying

2021-05-24T13:47:21+03:00

It is given comparative analysis different methods of wood drying and proposed a new method of highspeed drying, which is based on using operational liquid and original technology of lumber packaging. Physics of high-speed drying process is stated and main stages of method practical realization are considered.

Particularities long-term storage of light oil products

2021-05-24T13:47:21+03:00

The problem of preservation of quality of propellants is reviewed at their long-term storage. At use of the technological analysis the processes are determined, which one take place at storage of propellants and degree of their influencing on quality of propellants.

Mathematical model exchange of weight of processes in tanks of the plane

2021-05-24T13:47:21+03:00

It is analysed exchange of weight processes which occur in fuel tanks of the plane during flight. The mathematical model which describes these processes is constructed.

Neutral gas usage for jet fuel thermooxidational stability enhanctment

2021-05-24T13:47:21+03:00

Presented results of thermooxidative stabity of jet fuels TC-1 and PT from concentration of dissolved oxygen.

The comb’s composite materials for bearing building constructions

2021-05-24T13:47:21+03:00

The constructive scheme of selling composite materials for building constructions was proposed, which have next properties: great hardness and firmness on compression and bending, heat resistance, stable to creepage and small density.

Modelling of the sequence of the technological process fulfillment in building construction

2021-05-24T13:49:40+03:00

The tools for modelling of the sequence of the technological process fulfillment in building construction is developed with account on possibilities of compromising decisions and simultaneous decreasing of construction duration and cost, number of workers, increasing of productivity of the work.

Simulation of controlled systems with nonlinear quality regulators

2021-05-24T13:47:21+03:00

The outcomes of applying the new method of synthesis of regulators for nonlinear dynamic objects are investigated. The task of synthesis is solved by the updated method of analytical constructing on the basis of a square-law functional of quality. The application of a method of simulation is considered at research of quality of the controlled systems obtained as a result of synthesis.

Algorithm of calculation of electromagnetic coupling coefficient of antennas of airplane radio-electronic facilities

2021-05-24T13:47:21+03:00

It is offered the general algorithm of calculation of electromagnetic coupling unforeseen coefficient between airplane antennas independently of their types, positions and operation frequencies. It is adduced formulas for calculation of certain intermediate indexes, which are used in corresponding stages of algorithm realization.

Research of estimation algorithm's characteristics of controlled flight trajectory

2021-05-24T13:47:21+03:00

The outcomes of a research and statistical simulation of algorithm of trajectory estimation are given. This algorithm is able to imitate flight management and to form control signals in the correspondence with the actual laws, with nonlinear functions of restriction of signals. The algorithm has a high exactitude of trajectory estimations and allows avoiding the estimation divergence while maneuvering.

The using of random models under composites diagnostics by low velocity impact method

2021-05-24T13:47:21+03:00

There is described possibilities of Hilbert random processes using for mathematics modeling of information signals under diagnostics of composite materials. The experimental result which confirm variation of random characteristics of process depend upon defects in product is carried out.

Investigation of calculation models of the engine installation effects on aircraft noise levels

2021-05-24T13:47:21+03:00

The engine installation effects on aircraft noise levels are investigated in the article - shielding, reflecting and refraction of the sound waves on the elements of the aircraft frame and ensmes.

Refinement of methods of monitoring of psychophysiological states of air operators as a route of a heightening of safety of flights

2021-05-24T13:47:21+03:00

The deficiencies of an existing system of learning are considered psychophysiological possibilities and limitations of air operators. The necessity of usage of complex methods of psychophysiological selection, definition of work capacity and reliability is justified.

Free oscillation of nonlinear elastic pipelines

2021-05-24T13:47:21+03:00

The results of analytical resecerches of free oscillation of pipelines taking into account its geometrical nonlinearity and influence of own pipe's weight and liquid inside it are presrnted in this article. Considering of the nonlinearity of the pipeline allows to know forecast of dynamicol behaviour of energetic system more conectly.

Nolator-norator models of electronic elements and active circuits

2021-05-24T13:47:21+03:00

In this article we suggest complete nolator-norator models of active line quadruples and adjusted models of real transistors and operational amplifiers of different types. We also prove different approximate models of transistors. We offer nolator model of current distributor intensifier at first. The model of operational amplifiers also takes into account the presence of basic blocks and nonlinear blocks of the transmissive characteristic.

Generalized mathematical model of air outflow from compartment

2021-05-24T13:47:21+03:00

Has been developed the generalized mathematical model of air outflow from compartment, examined the special cases and ranges of application. Have been carried out the comparisons of calculations results for model and experiment. The developed mathematical model describes with adequate for practice accuracy the process of air pressure variation in compartment.

Modeling of longitudinal balancing the flying machine in system MatLab

2021-05-24T13:47:21+03:00

It is considered problem of modeling of longitudal balancing the flying machine. Algorithm of decision of supplieded problem is developped. It is brought block diagram of modeling, listings of the main block and results of modeling for plane IL-76T.

Model of cones of plane movement

2021-05-24T13:47:21+03:00

The analytical-computer method of construction of topological image for the analysis of a condition and controllability of complex nonlinear dynamic objects is suggested.