Vol 24, No 2 (2016)

The possibility of application of final elements method for of linear losses definition of pressure in pipelines and comparison of the obtained data with results of analytical calculation is considered. Unfortunately, under certain boundary conditions in the the analytical method the results are approximate which diverge from experimental data. The final elements method in gas-hydrodynamic tasks gives the exact result like in the analytical method, and in some cases even surpasses it. For a short period it is possible to make many calculations like "that - if".

The solution of the following problem was described. It is necessary to construct a state identifier of time-optimal closed loop system that controls the process of induction heating of cylindrical billets. This process can be specified by a nonlinear nonhomogeneous heat-transfer equation. For the purpose of the modelling such process a digital model developed in FLUX software was used. The procedure of identification in conditions of interval uncertainty of process parameters was proposed. It based on previously developed algorithm of analytical synthesis of inertialess state observer for the objects with distributed parameters which was described with linear spatial one-dimensional partial differential parabolic equations.

The reliability of solving the local task for reception and processing of electronic declarations of goods by organizational and technological subsystem (OTP) of the Federal Customs Service of Russia (FCS) is considered. When analyzing the OTP reliability a significant problem was revealed by FCS. The analysis of the organizational and technological subsystem is given. On the statistical data of the system failure the approximate parameter calculation is done.

The aspects of providing the serviceability of automatic and automated control system of technological structures, processes, complexes are considered. The importance of rapid recovery of control system after refuses and also planning of the routine maintenance is shown. The necessity of collection, treatment, analysis and use of control system reliability is underlined.

Geographically-distributed organizations with a global spatial scope are treated as a single globally distributed organizational system based on two organizational management methods of centralized and decentralized. The decision to choose one or another method of control of DSS is coordinated with a common information space of knowledge. Globally distributed organizational system is presented in the form of semantic Grid with a uniform distribution of work between the elements of the system with regard to their effectiveness.

It is noted that the path curving of the electric current carrier moving in the magnetic field, is capable influencing the speed and degree of volumetric charge separation in rock formation pores while its being under polarization by passing current. In this case, the increase of path tortuosity of the current carrier taking place due to the Hall effect and the carrier’s pulling out from the pore capillary walls results in the increasing of specific resistance of the rock. It leads to the reduction of diffusion currents accompanying relaxation process and, consequently, to the relaxation time scale increase of local volume charges formed as a result of polarization. The estimation of the amount of change in the current carrier path curving compared to pore capillary tortuosity is described. It’s pointed out that the values for magnetic fields research are quite achievable nowadays. The perspective of the investigation of rock formation electrochemical behavior by means of the magnetic field for more precise definition of induced polarization effect theory and its application in borehole surveying is substantiated.

The cubic spline - filter for the signal discrete values approximation is considered. The filter coefficients are determined on the basis of a frequency criterion. The frequency characteristics of a cubic spline - filter and a series of parabolic spline - filters are presented. Errors of approximation of the discrete values of harmonic signal are determinated. The error of approximation of discrete values of the Gaussian signal by considered filters are analyzed. Areas of approximating spline - filters application for on - line signal processing are described.

The conductive coating control method of the aircraft fuel tanks is discussed. Monitoring device construction and a general description of the scanning process are given. The effect of stray capacitance on the calculation error is made. The analytical equations describing the change in the capacitance between the conductive coating and scanning electrode are provided. A program of flaw detection of the modeling process simulating the passage of the scanning system over the fuel tank is developed. A maximum scanning velocity at given dynamic error is defined.

In this paper the increase of efficiency of petrowire transport due to application at oil pumping stations as the drive of oil pump installations of convertible aviation gas-turbine engines is considered. As fuel of the gas-turbine drive, the prepared oil associated gas was used. This type of the drive of the pump unit will allow to reduce terms of commissioning new oil pumping stations, to operate effectively oil pipeline productivity due to change of the frequency of rotation of a rotor of the oil pump, and also partially to solve a problem of utilization of associated oil gas. In this paper the composition of oil associated gas is defined and the characteristic of the gas-turbine engine, such as the power, efficiency, a consumption of fuel gas depending on the change of composition of fuel associated oil gas are investigated. The drive of the convertible gas-turbine engines working at associated oil gas is effective. The further recovery and oil transportation and development of this approach is actual.

Electric power supply of consumers of the oil industry is carried out from the existing electrical network or from own sources of electricity. In this regard, an actual problem is the development of measures to maintain power quality busbar end user. Enterprises use a significant number of induction motors (BP), which leads to the increased consumption of reactive power. , The best solution is to use the static capacitor batteries (BSK) to reduce this problem. Additional active power source is the alternative generation.

Hardware and software complex is intended for solving problems of the development of a microwave electro-technological processes and installations, and to control their operating modes. The complex allows to calculate the microwave camera of different type, to simulate the processes of electrodynamics, heat and mass transfer and thermal mechanics, to resolve the problem of synthesis of intelligent control systems. Proposed and implemented structural scheme of hardware and software complex for thermal treatment of dielectric materials in microwave chambers with a traveling wave. In the hardware management system microcontroller is used. To improve quality of regulation and control applied mathematical models used in the control loop on temperature with an infrared thermometer to measure the temperature of an object directly in the microwave, using below-cutoff waveguide. Upon accumulation of a certain number of results of simulation and measurement processes of microwave heat treatment knowledge base is formed, which is connected to the control algorithms based on fuzzy logic.

Over the last years new, more effective AGG-type burners on pyrolyze furnaces were introduced. Some of the burners were developed in Samara State Technical University. In order to increase the reliability of the AGG-type burners the were modernized. As a result the burner service life was increased twice. Also a regularity of gas-air mixture at exit of nozzle was increased. This result was confirmed by experimental researches. The regularity of the mixture burning on the radiating walls allows to equalize the heating surface temperature and increase the pipe coils service life.

The aspects of steel and magnesium alloys electrochemical researches are considered. IPC-Pro potentiostat was used. Polarization curves used to oil reservoirs corrosion protection are presented. The polarization curves analysis was offered. The use of the magnesium alloys as protectors in various concentrations is discovered. As is determined steel and magnesium alloys have similar polarization characteristics at low and high salt concentrations. A conclusion of using these alloys possibility in different conditions is drawn.

The features of induction heating of aluminum alloys which are problematic for heating by electromagnetic induction are discussed. Comparison with electric resistance furnaces is provided. Recommendations for selection of calculation methods of the inductors are given. The possibility of accounting for the longitudinal and transverse edge effects is considered. Energy features of three-phase inductors are revealed. The magnitude of the power consumed by the individual coils of a three-phase inductor does not correspond to the average temperature of the billet located in the coil. Depending on the values of the coefficients of mutual inductance and the phase current in each inductor the power consumption of each of the inductors may be different, as well as positive or negative. A single-phase coil of the inductor will have a maximum efficiency.

In this paper we propose a method of wavelet data processing in analytical instruments by radial basis function (RBF) using. The wavelet transform (VT) is carried out in two stages. On the first stage the interpolation of the initial signal samples by RBF using is carried. On the second stage is reduced continuously VT of the original signal with using of the linearity property of the wavelet transform and with knowing of the weight coefficients of the basis functions, the analytical expression for a continual VT and wavelet basis function.