Vol 13, No 5 (2012)

The author considers angular movement of a space vehicle. The spiro consists of two phases: workable control (in an apogee vicinity) during which the device is to solve a target problem, and duty control phase During duty control phase of the orbit the problems of orbit correction performance are solved with the help of electrojet engines and gravitational unload of accumulated angular momentum of operating members, namely, flywheels. At the process, for transition to orbit correction modes or for transition into demanded orientation on workable control phase, program maneuvers of a space vehicle are made. From the point of view of increase in time taken for gravitational unload is expedient to minimize durations of maneuvers of a space vehicle. Comparison of two ways of maneuvers of a space vehicle, optimum on speed [1, 2], is made. Comparison is made by the results of mathematical modeling at various sets of initial data.

The paper presents the results of power losses analysis in switching shunt regulator versus harness length and duty cycle, got by means of P-Spice simulation. The authors show that the power losses in switching shunt regulator are about 30 % of total power losses. The rest of losses are the share of shunt and blocking diodes of a solar array, slip rings of solar array drive and harness.

The authors describe a model of estimation of reliability of software of complex architecture and options for the construction of multi-version modules and consider variable characteristics of software architecture and estimate cardinality of its optimization.

The authors consider a problem of nonlinear dynamical systems of Wiener-Hammerstein type identification, when linear dynamical part of the system is in conditions of nonparametric uncertainty. The type of nonlinearity is assumed to be unknown or known completing the parameters. The algorithm for creation of adequate, as root mean square criterion, for models of systems. The proposed method of dynamic objects modeling is on nonparametric estimation of linear and nonlinear sub-systems.

The authors investigate a problem of identification of multidimensional inertia-free system with delay in conditions of non-parametric uncertainty. The main emphasis is laid on the problem of filling of a matrix of observation for the case when control discretenesses of “input-output" variables differ very much. The filling of the observation matrix technique is offered, numerical results of calculation experiments ,illustrating the efficiency of the offered technique for identification problems solving, are given.

Let B 0 (2,5, k) be the largest finite, provided by two, Burnside group ofperiod of the 5 th step of nilpotency k, and {a 1, a 2} be generators of this group. In this article the growth functions of the groups B 0(2,5, k) relative to A = {a 1, a- 1, a 2, a- 1}, are calculated for cases k = 1, 2, 3, 4, 5.

The author considers the aspect of application of the offered earlier model of reliability assessment of an enterprise automated management systems, in the case of project development of trade enterprise automation. The purpose is to give system reliability assessment in the form of a certain index and to calculate it at each stage of life cycle of development, and experimentally confirm dependence ofparameters which occur at formulas and to evaluate efficiency of the offered method of reliability assessment.

A new geometrical and nonlinear model of a transformable rim of a large space antenna constructed with the use of flexible composite strips, as basic elements, is considered. The decision found will allow to define the optimum form of the bent curvilinear strip and to estimate the stored energy.

The author considers a problem of the new class of processes with а «tubular» structure in the space of “input-output” variables. Modeling of these class processes differs highly from the generally accepted parametric models being a surface of the same space. A question of multidimensional systems modeling having small volume of learning samples is analyzed specially. To develop the trainable parametric models of «tubular» processes, the corresponding non- parametric indicator is introduced. A new class of trainable parametric models, and some results of the numerical investigation are presented.

Genetic programming algorithm for neural network automatic design is suggested. Ensemble member competence estimations, based on decision making with intelligent information technologies, is proposed. The approach effectiveness is approved on qualificatory and real-world problems.

The author shows that the system m (m> 2) of quasi-linear differential equations, derived from two variables and having two characteristics, is reduced to a system of two quasilinear equations and m-2 linear equation system.

The author studies problems of feeble solubility of mixed value problem for nonlinear partial differential equations with pseudo-parabolic operator of arbitrary natural power.

Experimental studies of viscous fluid in the front gap between rotating disk and fixed boundary are conducted, a design procedure for determination of parameters of the working fluid in the front gap is developed, comparative analysis with the methods of calculation of other authors is presented.

Systemic astion of additional payload on spacecraft functioning is considered. The structure of mathematical model for assessment of this influence is defined. Indicators of resistibility of a spacecraft and hypothesis used are presented.

This article presents query-oriented method of receiving telemetry information from the board of a spacecraft, analyses advantages of this method. For implementing this method, the possibility of creation of hardware database is considered.

A comparative analysis of electrocaloric and barocaloric efficiency in ferroelectrics Rb x(NH 4) 1-xHSO4 and TGS is performed. A good agreement was found between intensive electrocaloric effects measured experiшentally and calculated using electric equation of state. Barocaloric effects were evaluated by analysis of the experimental data on heat capacity and Т-р phase diagrams.

Method for monitoring of rnpact of magnetic fields on the electron Ьеат in the process of electron-Ьеат welding is proposed. The mathematical model of collrnated X-ray sensor of he effect of magnetic fields monitoring is developed.

Structure and magnetic properties of Pb 3(Mn 1-xFe x) 7O 15 with х = 0, x = 0.05, х = 0.1, х = 0.15 and х = 0.2 and Pb 3(Mn 0.9 5Ge 0. 05) JO 15, Pb 3(Mn 0. 95Ga 0, 05) JO 15 single crystals, grown by spontaneous crystallization from solution in melt, are investigated. All grown crystals belong to the hexagonal space group P6 3/mcm. The magnetic properties appeared to be heavily dependent on the level of doping by diamagnetic Ga and Ge ions, as well as by paramagnetic Fe ions. The authors show also the revealed destruction of 3-D magnetic ordering during doping by Ga ions and by Fe ions in the quantity of x > 0.1.

The authors present results of investigations of heat capacity, thermal dilatation, intensive magnetocaloric effect and susceptibility to hydrostatic pressure of La 07Pb 03MnO 3 single crystal. Experimental data were analyzed within the frame of the magnetocaloric and barocaloric efficiency of manganites in the vicinity offerromagnetic phase transition.

The author describes methods and means of manufacture and application of porous metallic materials in engineering

In the work the complete Raman spectra of oxyfluoride Rb 2KMoO3F3 in the temperature range 7-260 K were obtained. The structural phase transition at T ~ 185 K was found. The lattice dynamics of disordered crystal was simulated, the calculated spectra contain the «soft» modes of oscillations.

Results of researches of technological parameters during manufacture of pipes of waveguides from 32NKD alloy by method of mandreling.

The authors describe a process ofproduction of hard magnetic coatings by plasma spraying method, based on Sm-Co alloys obtained by the electric arc method. The influence of technological parameters of spraying process and heat treatment on the structure and magnetic properties of the coatings is investigated.

The article contains review of the modern state of the military-industrial complex of Russia, made up on the basis ofpublications in open sources, its problems, and provides with the most widespread variants of their solution.

Connection between assessment of efficiency of strategy of innovative development of higher education institution in the conditions of competition in the world educational market and assessment of quality of business processes of strategic management of innovative development is established. Business processes of strategic management by innovative development of higher education institution are classified. Use of special analytical tools of assessment of quality of business processes of strategic management of innovative development of higher education institution is proved.

The article considers basic directions and development trends of current business entities and presents techniques for managing company customer equity on the basis of quality management methods.