### INFORMATION TECHNOLOGIES AND SYSTEMS, COMPUTING TECHNIQUE

SYNTHESIS OF SELF-CHECKING BUILT-IN CONTROL CIRCUITS
BASED ON LOGICAL COMPLEMENT TO THE EQUILIBRIUM TWO-OUT-OF-FIVE CODE
Sapozhnikov Valery V., Sapozhnikov Vladimir V., Ephanov Dmitry V.

163

A method for organizing self-checking built-in control circuits for automation and computing devices, based on the method of logical complement to the equilibrium two-out-of-five code, is presented. A procedure for completing the definition of the control functions of a logical complement is proposed, which makes it possible to provide the formation of complete tests for the transformation elements and the tester in the built-in control circuit; this ensures the most even distribution of working combinations between all test combinations for all elements of the control scheme. The minimum number of working combinations required for a complete check of the elements of the built-in control circuit is six, which is 18,75 % of the total number of working combinations. The proposed method for obtaining the values of the control functions of the complement is based on the functional dependence of the control and operating functions of the diagnostic object, which ensures the simplicity of its automation and integration into the means of computer-aided design of digital computing systems.

AUTOMATIC CONTROL SYSTEM FOR THE MOVEMENT OF INDUSTRIAL PRODUCTS
USING RADIO FREQUENCY IDENTIFICATION TAGS
Alexey А. Orlov, Dmitry V. Titov, Alexandеr V. Astafiev

176

A system, intended to solve the problem of automatic control of industrial products using algorithms for multidimensional time series analysis, is being developed. Results of experimental studies of the system are presented to demonstrate the reliability of product identification and tracking of their movements outside the route at the level of 97.3%. Technical result of the described development is the expansion of the scope of product movement control systems due to the samples localization using radio frequency identification marks and local computing devices (equipped with radio frequency readers) located on lifting and transport mechanisms.

### INSTRUMENTS AND SYSTEMS OF AUTOMATIC CONTROL

OPTIMAL CONTROL OF THE PIEZO ACTUATOR
FOR TUNING THE RADIO-REFLECTING MESH OF SPACE REFLECTOR
Sergey A. Kabanov, Fedor V. Mitin

183

The process of controlling a piezo actuator for adjusting the shape of radio-reflecting mesh of a large-sized transformable space-based reflector is considered. A point-by-point adjustment scheme is selected. Due to the limited supply of electrical energy on board the spacecraft, the control problem is solved with the account for energy costs in real time. An algorithm has been developed for sequential control optimization for automatic cable length adjustment using a piezo actuator. The algorithm allows minimizing energy costs and fulfilling terminal conditions with high accuracy. By choosing the weighting factors, the best version of the control program is determined for different finite simulation times. The flexibility of the developed algorithm is shown when choosing the optimization criteria.

ALGORITHM FOR SEQUENTIAL OPTIMIZATION OF THE STAGE OF EXTENDING THE SPOKES
OF A LARGE-SIZED TRANSFORMABLE REFLECTOR
Dmitry S. Kabanov, Eugeny N. Nikulin

192

The process of spokes extension of a large-sized space-based reflector is considered with the account for compression oscillations. An improved mathematical model of the spokes extension is proposed, which includes mechanisms of the stop and the lock of longitudinal vibrations. The model makes it possible to explore the system vibrations at any point of the spoke during the simulation. An algorithm for sequential optimization of the control of automatic extension of antenna elements has been developed, which allows minimizing system oscillations and fulfilling terminal conditions with high accuracy. Results of numerical simulation are presented, showing the advantage of the proposed algorithm in comparison with classical control methods.

DEVELOPMENT OF A CONVOLUTIONAL LAYER OF A DEEP NEURAL NETWORK
FOR DETECTING DEFECTS IN ROLLED METAL
Denis G. Privezencev, Arkady L. Zhiznyakov, Dmitry V. Titov, Konstantin V. Mortin

202

A convolutional layer of a deep neural network, designed to determine defects in rolled metal products, is considered. To determine the defect, it is proposed to use algorithms for the segmentation of flaw detection images and several types of filtering within the convolutional layer. Filtering is based on the use of combined convolution algorithms with different initial masks. To minimize the error at the output of the convolutional layer, the GELU activation function is used. Results of the experiments are presented.

### ELECTRONIC AND ELECTROMAGNETIC DEVICES

MULTIPLICATIVE PROCESSING OF THE FREQUENCY SPECTRUM
OF THE MOBILE OBJECT RADIATION
Anatoly B. Atnashev , Vladimir G. Tsybrin

208

The problems of large-base electromagnetic sounding signals processing based on time scale transformation are considered. Application of the described method of signal conversion is shown to make it possible to compensate for the time shift, as well as the Doppler frequency shift of a signal of any structure, and to carry out optimal signal processing regardless of the speed of approach to the object. This provides increased noise immunity and the ability to accurately resolve targets.

METHOD FOR EVALUATING THE DYNAMIC RESISTANCE OF PIEZOELECTRIC ELEMENTS
Yuriy V. Zagashvili, Vitaly G. Rudenko

213

An engineering technique for evaluating the dynamic resistance of piezoelectric elements by an indirect method using experimentally obtained impulse transient functions (i.e., the responses of piezoelectric elements to impulse forces of a mechanical load) is presented. Dynamic models of piezo elements are developed and investigated based on equivalent electrical equivalent circuits. Dependence of the impulse transient function duration on the resistance of piezoelectric elements at various load resistances is derived. A formula is proposed for an approximate estimate of the dynamic resistance of piezoelectric elements for operation close to idle modes. Results of the theoretical analysis are confirmed by examples and experimental oscillograms of the impulse transient function obtained at various parameters of the electrical load of the piezoelectric elements.

ANALYSIS OF THE PROCESS OF THIN FILM DEPOSITION
IN VACUUM CHAMBERS BY HiPIMS METHOD
Tkalich Vera L., Natalia S. Potemina, Korobeynikov Anatoliy Grigorievich, Pirozhnikova Olga I.

219

The problem of developing a domestic reliable element base of micro-system technology, in which thin films are widely used in the creation of microelectromechanical systems, is considered. At present, magnetron sputtering methods are actively used to obtain thin films in vacuum chambers in a gas discharge. Such methods include the HiPIMS method. A stand is created for analyzing a gas discharge and a probe, which allows obtaining data for plotting the current-voltage characteristics of this discharge. A software developed in the MatLab environment made it possible to correctly process the obtained volt-ampere characteristics. Parameters influencing the mode of magnetron spraying (changes in voltage, pulse, pulse frequency and on-off time ratio) are established to make it possible to control over the process of thin films spraying and increase the percentage of yield of suitable product samples.

### OPTICAL AND OPTO-ELECTRONIC INSTRUMENTS AND SYSTEMS

RADIO-OPTICAL LENS REFLECTOR-EMITTER
Evgeny L. Shoshin

226

A scattering lens performing in the radar wave range the functions of radiation emission and reflection is designed. A technique for calculating the design parameters and energy characteristics of scattering for the radio-optical lens reflector-emitter is proposed. Results of experimental studies of the reflector-emitter prototype are presented.

### HEAT REGIMES AND RELIABILITY OF INSTRUMENTS AND SYSTEMS

METHOD FOR DETERMINING THE RELIABILITY OF THE ION CURRENT SENSOR
WITH EIGHT HIGH-VOLTAGE PROBES
Anton S. Boldyrev, Aleksandеr L. Verevkin, Artem Yu. Budko, Lina S. Verevkina

234

A methodology designed to determine the reliability of developed flame ion current sensor is presented. The sensor is intended for installations running on organic fuel: piston, rotary internal com-bustion engines; thermal power plants; jet and turbojet engines. The ion current sensor simultaneously measures both positive and negative charged ions at a temperature of 70-125 oC with eight high-voltage probes. Increased requirements for the reliability of components of combustion monitoring systems re-quire an accurate assessment of their reliability and are dictated by safety requirements. In the pro-posed methodology the structural and probabilistic methods for calculating reliability are supplemented by transformations with matrices for modeling computer operating modes. The reliability is calculated with a various number of working probes and different schemes of integer, redundant, sliding, hot, cold and majority redundancy of measuring channels. Such an approach to reliability allows to assess the risks more accurately, select the operating modes of the ion current sensor, and plan maintenance.