Igor Korobiichuk

A Mathematical Model of the Thermo-Anemometric Flowmeter

A thermo-anemometric flowmeter design and the principles of its work are presented in the article. A mathematical model of the temperature field in a stream of biofuel is proposed. This model allows one to determine the fuel consumption with high accuracy. Numerical modeling of the heater heat balance in the fuel flow of a thermo-anemometric flowmeter is conducted and the results are analyzed. Methods for increasing the measurement speed and accuracy of a thermo-anemometric flowmeter are proposed.

Precision increase in automated digital image measurement systems of geometric values

The article is devoted to the development of the algorithmic method of video image processing of natural stone products. These video images contain the measurement information about geometric parameters of products, and the parameters of their movement during production at stone processing plants. The developed methods provide the algorithmic compensation of random, dynamic and geometric errors of video images which occur at the forming stage. The measurement results of the above mentioned values are used to control the technological process in the stone processing plants, and to improve the quality of natural stone products.

The Additional Error of Inertial Sensors Induced by Hypersonic Flight Conditions

The emergence of hypersonic technology pose a new challenge for inertial navigation sensors, widely used in aerospace industry. The main problems are: extremely high temperatures, vibration of the fuselage, penetrating acoustic radiation and shock N-waves. The nature of the additional errors of the gyroscopic inertial sensor with hydrostatic suspension components under operating conditions generated by forced precession of the movable part of the suspension due to diffraction phenomena in acoustic fields is explained. The cause of the disturbing moments in the form of the Coriolis inertia forces during the transition of the suspension surface into the category of impedance is revealed. The boundaries of occurrence of the features on the resonance wave match are described. The values of the “false” angular velocity as a result of the elastic-stress state of suspension in the acoustic fields are determined.

Development of the Operation Algorithm for a Automated System Assessing the High-Rise Building

This article presents the algorithm of monitoring a high-rise building as a complex object. The functional areas (strata) of a high-rise building are considered and certain mathematical models and algorithms describing the process of monitoring a high-rise building are presented. The developed system using this algorithm should allow real-time monitoring of the life support systems, making better decisions in the event of unusual situations.

Piezoelectric Gravimeter of the Aviation Gravimetric System

In the article the functional schema of the aviation gravimetric system is reviewed, its structure and the possibility of using the piezoelectric sensor as the gravimeter is analyzed, the options for installing and fixing the piezoelectric gravimeter of the aviation gravimetric system are presented.

Torque and Capacity Measurement in Rotating Transmission

The task of measuring, monitoring and recording of the torque, mechanical stress and capacity is relevant for most transmissions of the process and transport machines. The importance of this problem is increased by an order in terms of unsteady loads (random, impulsive, alternating, etc.). The disadvantage of its correct solution by experimental methods is substantially limited by the need for expensive and unreliable, environmentally dangerous current collectors. To measure the dynamic and kinematic parameters of the rotating transmission by modern information computer technologies, we propose equipping the mechanical transmission with two additional half-couplings with point magnets fixed thereon, the scope of each includes one or more Hall sensors. The application of the developed technique allows determining the torsional rigidity of the transmission experimentally, and allows recording the actual torque and capacity per turn (or a part of the turn) of the transmission of a process or transport machine and record the same online in the computer electronic memory. This, in turn, allows an online assessment of the residual transmission resource, machine operation per shift and generate its operation history, which provides an invaluable information both to the machine developer and owner.

The Use of Remote Ground Sensing Data for Assessment of Environmental and Crop Condition of the Reclaimed Land

To solve the problems of environmental and crop monitoring, a Landsat remote sensing system is proposed, endowed with high spatial resolution of satellite images and the presence of spectral channels capturing the spectral characteristics of the studied objects in the visible and infrared spectra.

Approach to Determination of Parameters of Probability Density Function of Object Attributes Recognition in Space Photographs Is Considered Within Statistical Method

High information richness of satellite images is used effectively, only if they are processed promptly. Analysis of recent research shows that existing hardware and software allows only partial automation of object recognition in space photographs. Automation is reduced to visualization of images and measurement of their parameters. Further processing requires parameters of probability density function of object features recognition. To solve certain problems in geological, hydrological, forestry and other types of decryption, parameters of this distribution are estimated according to experimental data. However, this approach is not suitable for recognition of single compact surface objects. Therefore, reference images formed upon three-dimensional models are suggested to determine unknown parameters of probability distribution function. Method of allowable transformations is applied to determine initial conditions of reference images and take their recognition feature distributive law for a distributive law of recognition features of single compact surface objects.

Design of the Novel Double-ring Dynamical Gravimeter

In this paper, a description of the design and operation principle of the double-ring dynamically tuned gravimeter is given. This design allows for the gravimeter signal separation from the noise, which makes it possible to increase the measurement accuracy of Earth’s gravitational field anomalies using gravimetric aviation system

Synthesis of Optimal Robust Regulator for Food Processing Facilities

Food processing facilities operate under permanent perturbations. Their nature may be different: change of facility input load; external facility perturbations that change within wide limits; interference in communications lines; in-service evolution of internal facility parameters. These factors lead to a shift of optimum regulator settings and, consequently, deterioration in the quality of transients in regulation system. If perturbation uncertainty range is substantial, control system should imply modification of regulator setting, i.e. development of adaptive system. However, there is another approach, in which regulator settings are not changed. It is called a robust control system. Today there are various methods developed for determining a robust regulator, but they have significant drawbacks limiting and slowing their use in industrial environments, e.g. high-order regulator. The synthesis of matrix linear regulator for multivariable systems based on minimizing H∞-test has all the advantages of robust regulator and reduces interaction of contours. The paper studies and simulates an optimal robust control system for evaporation plant of sugar factory with a linear array regulator based on LMI-approach.