Ternary summation codes with simple construction rules, suitable for the digital self-checking circuits synthesis operating in ternary logic and able of detecting any non-compositional errors in information vectors (when the number of characters of each type is preserved), are considered. Rules for constructing the ternary sum codes, similar in its properties to the Berger binary code, are given. Two modifications of the ternary sum code are described – sum codes in the residues modulo μ=3 and μ=9 ring. Several characteristics of error detection by the codes are described. It is shown that the proportion of errors of multiplicity d, undetectable by binary summation codes, of the total number of errors of the given multiplicity, is a constant value independent of the information vector length.

Results of a study of the of motion planner performance based on single query sample of a for various kinematics of robotic manipulators and environmental characteristics are presented. The analysis is carried out in relation to the problems of finding a path in a multidimensional configuration space. Unidirectional and bidirectional planners are analyzed according to their sensitivity to changes in the values of two key static parameters: Range and Goal-Bias. It is shown that there are either minimal threshold or optimal values of each of the parameters considered, which differ significantly for various planning algorithms, but are practically invariant to the kinematics and the degree of filling of the robot environment with obstacles. Recommendations on tuning the considered static parameters of the planners are proposed.

The problem of identifying defects in dynamic systems described by linear differential equations is considered. Observers constructed on the basis of optimal control methods are used to solve this problem. The proposed method to synthesize such observers is based on the idea of introducing a new subsystem, in which the role of an unknown vector function describing emerging defects is played by some auxiliary control. This control is proposed to be formed in such a way as to provide a minimum of the residual functional. Unlike well-known approaches to solving the problem of defect identification based on observers operating in a sliding mode, the proposed method allows to expand the class of systems for which the identification problem can be solved, since the method of constructing sliding observers imposes certain restrictions on the systems under consideration. Results of simulation are presented to confirm the operability of the diagnostic observers synthesized using the described method.

Application of the total internal reflection method for the study of liquid-phase media based on botulinum toxin is considered. A comparative analysis of these drugs is carried out. Structural and functional scheme, as well as technical and operational characteristics of the developed refractometric system are presented. Botulinum toxin-based drugs - Botox, Xeomin, and Dysport - are used as objects of research. Experimental results of measurements of the concentration dependences of the refractive index in these preparations are obtained. It is shown that temperature dependences for Botox, Xeomin, and Dysport at various concentrations make it possible to change the algorithm of temperature correction of refractometric data.

Рассмотрены существующие методы оценивания показателей эффективности и определены основные направления исследований в этой области. Известно, что индекс общей эффективности использования оборудования служит основой для создания семейства показателей эффективности, которые разбиты на группы и классифицированы. Проведенный анализ позволил выявить основные методики модификации базового показателя эффективности использования оборудования.

The problem of the occurrence of locomotion disease symptoms in users of virtual reality helmets is discussed. To control the user's movement in virtual reality, a controller implementing the walking-in-place technique is proposed. The device consists of three sensors fixed on the user's legs and chest. The analysis of sensor readings is carried out is used as a basis of developed algorithms for recognizing steps, suppressing random deviations, and increasing the system stability. Results of an experiment involving 44 volunteers are presented to demonstrate a decrease in the frequency of simulation disorder symptoms when using the developed controller.

The object of research is composite materials, the main advantages of which include low weight of the structure and high resistance to mechanical and thermal loads. In order to predict possible loads on composite structures and take these data into account at the initial stage of parts development, computer modeling of the processes associated with them is required. A grid-less method for optimizing products made of composite materials based on elastically bonded meta-particles is proposed. The results of optimization calculations of dimensions for a test beam under the action of a static deflection load are obtained. The software implementation is carried out in JavaScript without third-party libraries. The weight reduction comprises 25% of the original model. Verification of the optimized geometry is performed under similar conditions of mechanical loading in the Ansys Student package. The developed prototype can be used to determine the possible percentage of weight reduction of a composite structure.