Abstracts of number Journal of instrument engineering

INFORMATION TECHNOLOGIES AND SYSTEMS

DECISION RULES IN ALGORITHMS FOR SYSTEM TECHNICAL STATE DETERMINATION Valentin I. Senchenkov

The problem of decision rules formulation in development of algorithms for a system technical state determination is analyzed. The algorithms in question are based on the combinational or the stepwise methods adapted to the tasks of functioning control, work capacity control, and failure search. Special consideration is given to correct account for time-correlation of separate events in stating the decision rules in control of system functioning.

HIGH-LEVEL SYNTHESIS OF DIGITAL SYSTEMS WITH THE USE OF LLVM INFRASTRUCTURE Roman Popov

High-level synthesis system is designed with the use of the open compiler infrastructure LLVM. A simple program of automatic generation of computer hardware microarchitecture based on high-level language algorithm is described. Main synthesis stages are considered using a simple demo program.

SPARE SET SYNTHESIS TECHNIQUE BASED ON DYNAMIC PROGRAMMING Igor V. Lysenko, Anatoly I. Ptushkin, Boris V. Sokolov

A method for synthesis of spare sets for complex technical systems is considered. A technique based on dynamic programming is proposed. The method peculiarities and its analytical capabilities are illustrated by presenting results of numerical experiment.

DEVELOPMENT OF FINITE ELEMENTS LIBRARY FOR СOMPUTER-AIDED DESIGN OF REED SWITCH ELASTIC STRUCTURES Tkalich Vera L., Labkovskaya Rimma Ya., Pirozhnikova Olga I.

The creation of finite elements library for CAD of modern reed switches for alarm systems is considered. History of reed switch design and manufacturing is discussed, comparative analysis of Russian and foreign-made switches is presented.

DEVICES AND SYSTEMS OF AUTOMATIC CONTROL

MATHEMATICAL MODEL OF RELATION BETWEEN ISOCHRONIC VARIATIONS OF CONTROL SYSTEM STATE CHARACTERISTICS AND ITS COMPONENTS PERTURBATIONS PARAMETERS Arseniev Vladimir N., Andrey G. Kokhanovsky, Alexander S. Fadeev

Relation between random variations of an aircraft control system parameters and the aircraft state characteristics at a fixed moment is considered. The problem of development of a linear model describing the relation is addressed. Values of the model parameters are derived by minimization of an integral functional under limiting conditions in the form of nonlinear matrix equation. An analytical solution to the variational problem is obtained, and advantage of the developed model as compared with the known model based on sensitivity factors is demonstrated.

ADAPTIVE CONTROL OVER NON-MINIMUM PHASE NONLINEAR OBJECTS Furtat Igor B.

The problem of adaptive control is solved for a specific class of nonlinear non-minimum phase objects. It is shown that algorithm designed for minimum-phase objects is applicable also for non-minimum objects systems under conditions derived.

FINE MECHANICS DEVICES

METROLOGICAL ASSESSMENT OF RELIABILITY OF MEASURING TOOL FOR EDUCATIONAL AND SCIENTIFIC PURPOSES Leonid V. Efremov, Zhanna V. Kumova

Efficiency of a new criterion of metrological reliability is demonstrated by the example of technical condition testing of measuring instruments used in scientific work and student training. Recommendations are formulated to improve training quality in operation of new facilities.

SCALE DIVISION AND RESOLVING CAPACITY OF THE SCALE Valentin A. Kulikov, Alexander V. Kulikov

A concept of a scale definition capability is introduced to relate to the readings distribution. The concept provides the basis for correlation of scale division value (resolution) and the instrument accuracy, random and systematic errors, and measurement error estimation.

ELECTRONIC AND ELECTROMAGNETIC DEVICES

IMPROVEMENT IN STABILIZATION OF OUTPUT VOLTAGE OF PULSED DC CONVERTER Anatoly I. Korshunov

A method to improve the quality of output voltage stabilization for pulsed DC converter is considered. The method is based on combination of perturbation action control (main control) with control over deviation of output voltage from a designated value. The possibility to depress the converter resonant features and to reduce the deviations by increase in output capacitor value is demonstrated. The effect of the converter nonlinearity on output voltage stabilization quality is assessed.

STUDY OF MAGNETIC PERMEABILITY OF STEEL SPECIMENS IN UNIFORM ALTERNATING FIELD UNDER TENSILE ELASTIC DEFORMATION Vladimir A. Sandovsky, Eugeny M. Fainshmidt

A setup for measurement of magnetic permeability of steel specimens under tensile elastic deformation is described. Theoretical background of the approach and the measuring method are presented. Dependence of magnetic permeability components on loadings value, magnitude and frequency of magnetic field, and on the specimen material structure is studied with the use of graphical interpretation of experimental data.

OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS

EVALUATION OF EFFECTIVENESS OF HIGH-POWER LASER AMPLIFIER Vitaly V. Lobachev

Integrated criteria of optical homogeneity of high-power laser active medium are discussed. Optimization of laser amplifier is shown to account for both power characteristics and effectiveness of laser radiation energy transmission to operation zone. Specifics of optimal scaling for laser amplifier operated under linear and saturated amplification conditions for regular and statistical phase inhomogeneity of the active medium are revealed.

DEVELOPMENT OF A SIMILARITY CRITERION FOR COLOR CHARACTERISTICS OF GAS DISCHARGE METAL-HALIDE LAMPS Igor A. Gariutin

The known color coordinate systems are reviewed and possibility of application to development of similarity criterion for color characteristics of gas discharge metal-halide lamps is considered.

COLORIMETRIC DETECTOR BASED ON THREE-ELEMENT RGB-PHOTODIODE Nikolay P. Belov, Grisimov Vladimir N, Yuri Smirnov, Sherstobitova Aleksandra S, Yaskov Andrey D.

Basic design features and technical performance characteristics of laboratory colorimetric detector based on three-element RGB-photodiode with three optical filters for measuring of color parameters of transparent and diffuse reflective objects are considered. The detector calibration procedure is discussed. Results of test measurements carried out with colored glasses and diffuse reflectors are presented.

ANALYSIS OF THE CONTRAST TRANSFER FUNCTION OF A VIDEO SYSTEM WITH CCD PHOTORECEIVER UNDER TEST-OBJECT VIBRATION Evgeny A. Zryumov, Sergey P. Pronin

The effect of test-object vibration on the contrast transfer function is analyzed. Discrepancies between the known theoretical results and the experimental data are revealed, and an improved model for the contrast transfer function is proposed.

LASER CLEANING OF METERING ROLLERS UNDER SPECTROSCOPIC CONTROL Andrey A. Samokhvalov

A method of control over laser cleaning process by means of laser-induced breakdown spectroscopy (LIBS) is presented. A spectroscopic criterion of safety cleaning of metering rollers is formulated; the criterion allows for surface structure retention at maximal cleaning effectiveness.

HEAT REGIMES AND RELIABILITY OF INSTRUMENTS AND SYSTEMS

THERMAL CONDUCTIVITY DETERMINATION OF ELECTROCONDUCTIVE MATERIALS BY THE RADIATION THERMOMETRY METHODS Vyacheslav P. Khodunkov

A method is proposed for thermal conductivity measurement of electroconductive materials at high temperature, the method being based on Thomson effect in conductors heated by direct electric current.

STUDY OF HEAT GENERATION POWER IN THE ELEMENTS OF ELECTRONIC AND OPTOELECTRONIC TECHNIQUE Vladimir A. Korablev, Dmitry A. Minkin, Савинцева Л. А., Alexander V. Sharkov

A method for measurement of heat generation in semiconductor devices and in pulsed gas discharge lamps is considered. One of possible realizations of the method is described in details.