Vol 12, No 1 (2013)

The paper presents the results of verification of the proposed criterion for assessing the adequacy of artificial gravitation and Earth gravitation. The validity of using this criterion in solving the similarity / dissimilarity problems of artificial gravitation and Earth gravitation is shown.

The paper is devoted to the optimization of using Earth remote sensing space modules of an orbital system in the survey overview mode for vast areas. It is suggested that the controlled area should be described by a set of non-overlapping Dirichlet domains – spherical polygons with equal circumradii. Each center of a Dirichlet domain (nodal point) is described at any point of time by the priority coefficient which depends on the importance of the area and the length of the time interval after the previous observation of the given point by one of the orbital system satellites. The target function in the optimization task of using Earth remote sensing space modules is the accumulative value of importance coefficients of the node points included in the plan of space modules application. An algorithm for solving the defined problem of combinatorial optimization is proposed taking into account the restrictions on power consumption and volumes of accumulated target information transferred to consumers.

The paper presents a computer model of masses of the basic aircraft units at the stage of technical proposals in a 3D CAD system CATIA .Comparative analysis of the models of aircraft part masses is carried out. An algorithm of automatic aircraft plane balance is proposed on the basis of the 3D model developed.

The paper is devoted to impact tests of a system of the «Frigate» upper-stage rocket, various methods of influence on the test object being used. A procedure is proposed for testing the system of separating the upper stage from the «I» block that makes it possible to reduce the number of loadings of the object.

The paper presents a method of integrated assessment of the efficiency of an orbital inspection space system based on small satellites with electrojet power modules. The main indicators of the system’s efficiency are defined. An algorithm for calculating the coefficient of integrated relative assessment of an orbital inspection system is developed. The approbation of the developed algorithm was carried out in order to define the most efficient variant of creating the system with the given priority coefficients. The results of assessing the system’s efficiency are shown to depend strongly on the values of the coefficients of priority of the indicators.

The paper describes a system of active noise suppression based on a one-meter long air duct with the section of 10×10 cm with built-in speakers imitating noise and anti-noise. The system of automatic noise suppression generates anti-noise in accordance with the signals from two acoustic sensors. The efficiency of suppressing acoustic feedback is analyzed. An active noise suppression system based on FPGA (field programmable gate array) was built. A microelectromechanical Microflown sensor directly measuring particle velocity is used as the reference signal sensor.

The paper presents theoretical analysis of various models of self-training using a uniform formal system of concepts. Models based on concepts of reinforcement of communications and a choice from a set of hypotheses are described as well as models of automatic and perceptron types. A number of parameters describing the process of self-training is derived.

The paper is devoted to the influence of technological parameters and methods of high-frequency current heating on the structure of VT9 alloy blanks for high-speed stamping. The influence of the blank structure on the strain stress state, the complex of mechanical properties, the energy of deformation and stability of stamping equipment are analyzed. Comparative estimation of high-frequency current heating and oven heating is given. The procedure of carrying out the experiments is presented and the analysis of their results is given.

The paper presents a mathematical model of a hydraulic drive with a discrete liquid flow regulator in the form of a switched inertial device that has a damper of working medium oscillations at the output. A hydraulic actuator loaded with mass was used as a final control element. Transition processes occurring when the regulator is activated are calculated by modeling the dynamic processes with the help of the Simulink software package. The research shows the impact of the valve operating frequency and pulse ratio on the dynamics and efficiency of the hydraulic drive. It could be concluded that the use of a hydraulic attenuator results in decreasing the level of pressure ripples at the inertial tube input.

The task on cyclic compression of a multilayer multispan package of corrugated sheets is solved by the Bubnov-Galerkin method taking into account the rotation of the package sections located at the vertices of corrugations. The relations describing any loading processes in the field of elastic - hysteresis loops of the package are obtained.

A method of logical synthesis of combined Sun photometers designated for (a) measurements of linear spectrums, and (b) measurements of continual spectrums is proposed.

A device for monitoring the concentration of organic impurity on the surface of dielectric substrates such as CT-50, BK-94, BK-100, C5-1 in the range from 10-7 to 10-10 g/cm is described in the paper. The block diagram and the schematic diagram of the device as well as the algorithm of its operation are presented. The structure makes it possible to replace a substrate (the sample under study and the probe) within 60-80 seconds.

The paper describes an antenna based on a conical horn and magnetized gyromagnetic resonator (GR) on a metal screen which is used to measure electrical characteristics of an electromagnetic microwave concentrator. The antenna under study has improved characteristics as compared with a similar structure without a GR: significantly higher gain at low weight and overall dimensions, circular polarization field radiation with high selectivity, electrical switching of the field rotation direction and virtually inertia-free electrical tuning of radiation frequency.

The paper presents a complex of interconnected economic mathematical models describing material and financial flows during the collaboration of investors and the bank in project financing. The models take into account a number of common parameters, which makes it possible, with their joint usage, to implement coordinated collaboration in a one-level system.

The paper is devoted to the struggle of the 1st convocation deputies of the State Duma of the Russian Empire for the expansion of legislative powers and for the elimination of the upper house – the State Council. The attitudes of various parties and periodicals and the opinion of leading Russian lawyers of the beginning of the XX century on the matter are presented. Peasants’ mandates to the deputies concerning the demand for the sovereign State Duma are analyzed. The attitude of certain deputy groups concerning the expansion of legislative powers of the Duma is presented. Two stages of struggle for the expansion of legislative powers and elimination of the State Council are discussed.