Vol 11, No 7 (2012)

The principle of construction, block diagrams and operation algorithms in digital fiber-optic displacement sensors with a closed optical channel, characterized by high reliability and ease of integration into the passive sensor network.

In many problems of the system analysis a graph theory is widely used, which allows using the mathematical apparatus of analysis of binary matrices to obtain important information about the internal structure and properties of the simulated objects. In particular, algorithms for proper numbering directed graphs are used in problems of topological sorting acyclic graphs. The article deals with the universal topological sorting algorithm that allows for the correct numbering, including contour digraphs.

The analysis of the tunnel diode are carried out, the equivalent circuit is considered, a direct branch of the currentvoltage characteristics is simulated, the calculated dependences of the functions are submitted that make up the current - voltage characteristic.

The article covers the development process of virtual information-based educational environment, substantiates the choice of design and programsolutions, describes the structures of learning course and virtual three-dimensional space.

This document describes problems of the spacecraft’s control algorithms correct creating. It contains real-time control algorithms math model, verification math model, it explains requirement’s verification problems of the real-time control algorithms and it describes the visual design computer-aided system functioning, that implementing the verification model.

An algorithm for production tests of electronic components is proposed. The features of dynamic tests are considered. Test exposures are selected. The time of the test for the linear model parameter changes electrical radio products was determined.

The article shows the relevance of experimental and theoretical methods in conducting design studies of models of electronic means (REMs). The necessity of the use of expert systems in all phases of the development of REMs. An algorithm for the design of experimental studies REM theoretical method, which allows through the use of expert systems to increase the efficiency of the design decisions.

The method of calculation of the electric and magnetic fields in homogeneous shields for calculations electromagnetic interference inside the hull of on board equipment of space vehicle under influence of electrostatic discharges. Experimental results confirming the adequacy of the proposed method.

New method for the determination of blades oscillation parameters is proposed. The approach is based on the analysis of primary transducers signals distortions using nonlinear approximation techniques. Blades oscillations lead to distortions of primary transducer output signal, non-linear approximation techniques allow to determine blade oscillation parameters.

The study suggests a new index to assess hydrocarbon fuels antiknock value. This is a complex antiknock index, which depends on fuels' electrophysical parameters. Actual index part characterizes fuel's antiknock value, virtual part stands for its fit (compliance with standards). The research analyses relationship between octane and cetane number, taking into consideration index suggested. The article presents a structure diagramofmeasurement device.

The work is described mathematically by an energy field created by emitting a pulse as it propagates in an inhomogeneous absorbing medium. We give a three-dimensional mathematical description of the algorithm and the propagation of pulse signals sent in inhomogeneous absorbing stationary and moving media. Determined by the pulse energy and the group velocity. Changing the amplitude and spectral composition of the pulse passing through the medium under investigation provides diagnostic information about the environment.

The article describes a device control, allowing to make culling dual-anode diodes. The proposed device has a high accuracy and reliability of the control. The device allows to set different rates of change of the output voltage bipolar voltage ramp generator.

Considered the most widely used in modern electronic industry types of coatings. Comparative evaluation of finishing coatings of printed circuit board electronic components. Assessing the impact of design parameters on the performance of PCB coatings.

Considered are the peculiarities of their design and application binary optical-mechanical sensors differential type for the automated control systems and control. Analyses advantages and disadvantages of this decision, the conditions of use of sensors, made the calculation of the information capacity of the system. It is shown that the modes of operation of the sensor to the effect of a number of operational factors.