Instrument-making and information-measuring equipment

Analysis of transition from rating scale to quasiorder scale under conditions of polymorphism

Our study deals with the procedure of measuring the properties of complex object on the ordinal and quasiorder scales under conditions of polymorphism. We discuss some options of decisionmaking in light of the decisive rule and analyze the influence of gradations quantity of the ordinal scale on uncertainty of measurement results on the quasiorder scale. We receive the estimates of measurement results’ uncertainty on the quasiorder scale as probabilities of proper assigning to the certain class of equivalence, as well as on the scope of measurement results.

On creating the new 3d tomography reconstruction algorithm

We consider the algorithms of three-dimensional tomography reconstruction and suggest their classification. Likewise, we propose the 3D-reconsruction algorithm with the transformation of the cone-beam projection to the parallel fan-beams projection. Finally, we show that this algorithm allows increasing the volumetric reconstruction efficiency at the expense of decreasing the calculations at convolution and simplifying the back projection.

Maintenance engineering of laser therapy procedures

This paper presents a simple design of the laser beam scanners with movements along a spiral, allowing to irradiate any body areas, developed for the low-income medical institutions.

Optimal control algorithm synthesis of aerostatic vehicle movement on the takeoff phase

This study proposes a novel approach to optimal control algorithm synthesis of aerostatic vehicle movement on the take-off phase. Furthermore, we synthesize the automated control algorithm by declination of aerostatic vehicle thrust vector on the take-off phase. Through the simulation of “Zeppelin NT” type aerostatic vehicle take-off, we demonstrate the effectiveness of the synthesized control algorithm by declination of aerostatic vehicle thrust vector.

On determining the optimal elastic parameters in the idealized construction of elastic suspension of dynamically tuned gyroscopes

We show the possibility of creating an elastic suspension of the reasonable size, loading capacity and stiffness characteristics. Moreover, we obtain the optimal size of the elastic elements, providing the linear equal-stiffness of an idealized suspension and minimal possible angular stiffness relative to the suspension axes.

Lightweight Class Systems of Launch Vehicles Air Start

This paper analyzes current trends for developing the lightweight class systems of launch vehicle air start. Crucially, we show their basic advantages and disadvantages.

On Evaluation of Microsatellite Spatial Angular Orientation by Ellipsoid Filter

This study aims to examine the dynamics of microsatellite at the ellipsoid filter use in the algorithm of its angular orientation determination. Moreover, we compare the accuracy of orientation determination at the use in the control system of ellipsoid filter to Kalman filter.

Aberrations of an Optical System of the Human Eye Chapter 2. Technological errors of a doublet physical eye model with aberrations

The present study considers the influence of technological errors of construction parameters of the optical system of the human eye model on the errors of a simulated wave aberration. We verify the technological possibility of manufacturing the model with an accuracy of wave aberration simulation, sufficient for examining ophthalmic aberrometers

Processing and coding of signals and images in the remote network monitoring of objects’ conditions

In this paper, we study the functional characteristics of the signals and images’ operative filtration and compression, optimized on the coding speed and accuracy. Besides the filtration-compression method for monitoring data is based on the alarm approach. Employing this method, we define the most informative readouts on the signals envelope and point out that their amplitude and hour characteristics after compact coding/decoding are likely to be constant.

Mathematical model of continuous vibratory errors of the pendulous compensating accelerometer with a sensitive element resilient suspension

The present paper develops a mathematical model of the continuous vibratory errors of the compensating accelerometer with a sensitive element resilient suspension. The described errors appear in most general conditions of a spatial oscillatory motion of the pendulous base. Furthermore, the analytic formulas for calculating these errors are obtained, and the calculations of these errors for the navigation accelerometer AK-6 are carried out.