A complete model of the motion of a quadcopter along a smooth spatial trajectory is presented. Using the model, a robust algorithm for controlling a quadcopter based on measurements of linear coordinates and yaw angle is proposed. Using additional integrators, a dynamic control algorithm with a simplified controller tuning technique is designed.

To determine a rational route for an aircraft, taking into account the terrain, a method for solving the corresponding problem is proposed based on the integrated use of multi-agent stochastic search algorithms. To assess the quality of the aircraft's route, taking into account the restrictions imposed on the problem, it is proposed to use a complex criterion in the form of a penalty function. An algorithm for generating a reference route option is developed based on the results of solving the problem using the method of river formation dynamics. A rational route for the movement of an aircraft is carried out using the particle swarm method. The data of the reference variant of the route of the aircraft are used to determine the values of the parameters of the algorithm of the particle swarm method and its initialization. Results of an experimental test are presented, demonstrating the performance and effectiveness of the described method.

Distortions in the spatial and temporal distribution of laser pulse power density introduced by the propagation medium are studied. Information about such changes is necessary in laser ranging problems, including object recognition. Based on the developed program for solving the radiation transfer equation by the method of characteristics for modeling a laser signal propagation through the atmosphere in the presence of turbulence associated with local natural and anthropogenic phenomena, the impact of these phenomena on the spatial and temporal shape of the laser pulse are revealed. Results of calculating the influence of turbulence on the temporal and spatial shapes of the signal are analyzed. Phenomena are identified in which significant distortion of a laser pulse incident on an object occurs, and it has been established that such distortions can lead to errors in object recognition in laser ranging systems.

Presented results of studies of the spectral characteristics of retrofit lamps of the A60 type form factor include correlated color temperature and spectral distribution of radiation flux density during the burning time of the lamps. Changes in the spectral characteristics of the studied LED retrofit lamps are analyzed over a period of 6000 hours and the proportion of the blue component of the lamps under study is determined. Measurements of lamp parameters are carried out using a photocolorimetric measuring setup at a network voltage of 220 V. When calculating the chromaticity coordinates and color rendition of the lamps under study, the spectroradiometric method is used. Research results show the feasibility of replacing traditional lamps by LED light sources with parameters favorable to humans.

A description is given of the improved design of a flow-through proton magnetic resonance (PMR) analyzer for express monitoring of well fluid and oil characteristics. A new technology for the analyzer application in oil production using submersible centrifugal pumps in the structure of the industrial Internet of things with edge computer processing in an intelligent digital oil and gas field is described. Presented results of the work include a new sampling system that increases the representativeness of the selection, and an algorithm for operation of PMR analyzer in the structure of the industrial Internet of things with computer processing, which allows to overcome limitations, reduce the cost of operations, increase the reliability of data and the reliability of equipment operation. The advantages of the PMR relaxometry method and devices based on it for monitoring the properties of liquids and controlling oil production and treatment plants are considered.

The current state of the art in the field of metrological support for laser and optical speed and length meters is discussed. The relevance of improving the reference base for metrological support of such tools in accordance with modern needs is shown. To solve the problem, the KSD-2 stand for measuring speed and length (distance traveled) is developed, allowing measurements of speed in the range of 0.1–50 m/s and length in the range of 1–99999 m. A description of the design and operation principle of the stand is presented, and experimentally determined metrological characteristics of the stand are given. The main contributions that make up the confidence limits of the relative error in measuring the speed and length (traveled path) of the KSD-2 stand are considered. The results of the study are of interest to metrologists working in the field of measuring mechanical quantities, design engineers, as well as manufacturers and users of laser and optical speed and length meters.

The possibility of expressing the meaning of a physical quantity using dimension and unit of measurement is explored. It is shown that in order to create a science of quantities, for the operation of computer programs and artificial intelligence with the meaning of quantities, a classification of quantities according to semantic criteria is needed. The purpose of the article is to show the unsuitability of units of measurement and their dimensions for identifying quantities and the need to develop a different way of classifying quantities according to their meaning. Using examples, the possibility to convey the meaning of a physical quantity by raising dimension or unit of measurement of the basic quantity to a certain power is tested. All considered examples gives negative results. A peculiarity of the quantity “length” has been revealed in the matter of forming the dimension of a derivative quantity by raising the dimension of the main quantity to a power. This feature is explained by the possibility of combining length with different directions in space. Raising the length dimension to a power replaces operations with vectors. Cases of exponentiation of other dimensions are meaningless fragments and do not correspond to any value accepted in science. It is recommended to direct efforts to study and formalize the connections between the quantities themselves, combining the approaches of such sciences as metrology, physics, mathematics, and theory of knowledge.

A promising approach to solving the problem of time scale synchronization using three mobile radio telescopes is proposed. Results of calculating the inaccuracy of time scale formation of one mobile radio telescope and of time scales of two others participating in the observation, are presented. The proposed algorithm makes it possible to estimate the error in the formation of a local time scale and serves as a backup for increasing the stability of coordinate-time and navigation support system functioning.

A technology for mirrors manufacturing from Wood’s alloy is considered and a specific example of their manufacture is given. A workpiece from this alloy is obtained by casting into a mold made on a 3D printer. The shaping of the mirror is carried out on a diamond micro-turning machine. The proposed approach makes it possible to quickly (within 1–2 days) produce prototypes of mirrors of complex shapes.