Abstract The problem of the functional diagnostics of engineering systems described by nonlinear differential equations with constant coefficients in the presence of disturbances is considered. To solve the problem of fault identification, the sliding-mode observers are used. The proposed approach is based on the idea of constructing a reduced model of the original system (a model with a lower dimension)

Abstract A sweep method is proposed for solving the optimal control problem with unseparated boundary conditions. This model reduces the boundary conditions to the initial condition. Using the properties of the J-symmetry of the corresponding Hamiltonian matrix and Euler–Lagrange equations, it is shown that linear algebraic equations for determining the missing initial data of the system being solved

Abstract We consider a small device for converting the medium’s flow energy, which is designed based on the use of a crank mechanism. A blade interacting with the flow is fixed on the connecting rod of the mechanism and the crank shaft is connected to the electric generator’s rotor. The system has a control input that allows us to control how much of the energy taken from the flow is converted into

Abstract The problems of artificial intelligence, control and decision-making with incomplete or unreliable information include a wide class of problems of abductive explanation of the observed, including cause–effect problems. The study is devoted to the substantiation of the method of logical formation of hypotheses explaining the observed. Means of knowledge representation and derivation of hypotheses

Abstract In this paper, we analyze the problems of using two-beam laser-ranging systems (often called lidars) on unmanned vehicles to ensure traffic safety and ways to solve them. A cost-effective way to implement a lidar system with controlled (adaptive) scanning of the road surface is proposed. Algorithms for processing information and controlling the inclination angle of laser beams for sounding

Abstract Iris-based identification is a well-known and widely used technology. However, its use in mobile devices is limited due to the algorithmic complexity of the existing methods and their low universality with respect to various capturing conditions. A method for finding the iris area by approximating its boundaries by two circles is proposed. The relative error of determining the circle parameters

Abstract The features of the functioning of the systems of automatic tracking of air objects, optimized according to the classical quadratic functionals, are considered, and their shortcomings are noted when tracking objects moving along complex trajectories. A variant of the solution of the problem of the local optimization of automatic tracking systems based on minimizing quadratic-biquadratic quality

Abstract The use of stochastic gradient algorithms for nonlinear optimization is of considerable interest, especially in the case of high dimensions. In this case, the choice of the step size is of key importance for the convergence rate. In this paper, we propose two new stochastic gradient algorithms that use an improved Barzilai–Borwein step size formula. Convergence analysis shows that these algorithms

Abstract In the kinematic formulation, two problems are considered for the time-optimal control of the position of a single-link pendulum fixed on a movable base that can move along the horizontal axis. In the first problem, the initial position of the pendulum is the lower, stable position of the pendulum; it is required to transfer it to the upper, unstable position resting either in an arbitrary

Abstract Recently, unmanned aerial vehicles are being used more often for reconnaissance in combat conditions. Communication with unmanned aerial vehicles must be carried out in a confidential mode to protect against the interception of control, while being fast and resistant to attacks from outside. A new algorithm for transferring confidential data, based on the properties of extremal uniform hypergraphs

Abstract We consider a system with two degrees of freedom (a pendulum on a trolley) in the case where one restricted control force is applied to the trolley. The task of a time-optimal horizontal movement to the required distance from the given equilibrium position to another identical state with the suppression of oscillations is solved. Trajectories that meet the necessary optimality conditions for

Abstract We consider a methodology for organizing hybrid computing structures to simulate abrupt changes in controlled natural processes and analyzing phases of extreme environmental phenomena. Systems of differential equations with the dynamically redefinable right-hand side at special moments (events) are used. The truth conditions for transitions are obtained from computing other equations for additional

Abstract A telematics device is modeled as a two-stream Markov one-channel priority queuing system of finite capacity equipped with a probabilistic pushing out mechanism. Its probability, \(0 \leqslant \alpha \leqslant 1\), of pushing out is the control parameter of the queuing system. It is experimentally and theoretically proved that on the plane of the load factors for high-priority and low-priority

Abstract The calculation of the set of all simple paths connecting two vertices of an undirected graph is considered. The more general problems of connecting vertices which belong to disjoint sets of vertices in a graph by all simple paths are also investigated. The connection between these problems and finding vertex biconnected components and graph bridges is established, and based on this their

Abstract The problem of logical recognition of the operating mode and dynamic estimation of the intra-mode state vector of a discrete-time stochastic Markov system with a random structure is considered. To develop an estimation algorithm implemented at the pace of system time on a computer of limited power, a method for designing a new finite-dimensional optimal structure filter is proposed. Its state

Abstract The problem is to formalize the solution of a two-person zero-sum multicriteria (MC) game, providing a payoff to both players with respect to their MC best guaranteed results. As the basic concept of the solution of the MC game, the Shapley equilibrium is selected. It is parametrized by the inverse logical convolution based on scalarization in the Germeyer sense, i.e., on the weighted maximin

Abstract As all computational programs, derivation sequences of functional dependences are twice partially ordered sets: by following the instructions in the program and by their execution in time. Order consistency is achieved by the theoretical multiple embedding of one into another. Hereinafter, such sets are referred to as cascade ordered, and there is no need to resort to the terminology of the

Abstract The concept of the Artificial Dispatcher autonomous intelligent control system for integrating into modern automatic control systems of electric networks in order to improve the efficiency of managing the modes of electric power systems is proposed. This intelligent control system is implemented based on the deep machine learning technology and joint use of the Monte Carlo tree search method

Abstract A description of the software designed for controlling robotic observatories is given. Its main features and functional capabilities are described. Special attention is paid to approaches to improving the utilization of the telescope observation time, which is its main resource. A solution for the automation of routine observational tasks the execution of which directly affects the efficiency

Abstract This paper considers the basic constructs and semantics of the action description language designed for defining and computing transformations of situation model relations (relational transformations). The main difference between this language and traditional action description languages (STRIPS, ADL, etc.) lies in the use of—in addition to the traditional (STRIPS-like) rules—their set-theoretic

Abstract An autonomous mechanical system with two rotational degrees of freedom, undergoing the action of conservative and nonconservative forces, is considered. The corresponding dynamical system contains changeable parameters that can be treated as amplifying coefficients for control actions. It is required to select the values of these parameters in order to form an autorotation mode in the system

Abstract We propose an algorithm of a dynamical model for the search-detection-recognition of objects by the onboard thermal-imaging systems operating in the wavelength ranges from 3 to 5 µm and 8 to 12 µm. We provide the main simulation results under the action with respect to ground objects, analyzing the influence of the main agents on the probabilistic-range characteristics of the scene–optical

Abstract A linear stationary system of differential-algebraic equations of an arbitrarily high unsolvability index with interval coefficients is considered. Sufficient conditions under which the general solution of the perturbed system has the same structure as the solution of the original system are obtained. These conditions are formulated as finite relations to be satisfied by the interval coefficients

Abstract An approach is proposed to identify abnormal modes of a power system in real time, using only the data of synchronized vector measurements and that does not require a priori information about the parameters of its mathematical model. The algorithmic base of the method is the algebraic criterion of consistency of the linear matrix equation for the identification of the mathematical model of

Abstract In the computational experiments on a model of a multiuser communication and control network, changes in the system’s performance under destructive effects are studied. The vector of the maximal flows that can be transmitted independently between all nodes is used for the multicriteria assessment of the system’s functionality. The set of damage of various types is considered, consisting of

Abstract The classical assignment problem is considered. A third index is introduced, which can characterize, for example, the location of the work carried out. An iterative decomposition algorithm is proposed. At each step, a problem is solved with three constraints from different groups of conditions and with one connecting variable. The triples of problems are also solved with one restriction, and

Abstract An effective (performance- and accuracy-wise) computational method for pattern recognition in a continuous video stream using deep neural networks for access control systems is proposed. The class of recognition problems solved by the method using a sequence of video stream frames is identified: the vehicle itself and the characters on its license plate (LP), faces of people, and abnormal

Abstract In this paper, we develop structural solutions of the selectively invariant electromechanical systems (SI EMSs) that adapt the regulators presented in the canonical form of controllability (CFC) and in the canonical form of observability (CFO) to changes in the velocity level. Their capabilities to provide the specified quality indicators in a wide velocity range are comparatively analyzed

Abstract The problem of increasing the maneuverability of a spacecraft (SC) by minimizing the duration of rotations around the center of mass is solved. The case is studied when the orientation is controlled using inertial actuators (power gyroscopes, gyrodynamics). The problem of the fastest possible turn of an SC using gyrodynes from an arbitrary initial angular position to the desired final angular

Abstract We model movements of a person swinging on a swing. We consider a flat three-link hinged mechanism as the main mechanical model of the person sitting on the swing. The first, second, and third links model the human body, two hips that are rigidly connected to the swing, and two shins, respectively. The hinge between the first and second links models two hip joints, while the hinge between

Abstract This paper demonstrates the technology for calculating spacecraft’s (SC’s) programmed laws of orientation that does not generate special, singular, states of the control moment gyro systems and consists of two collinear gyrodyne pairs. The calculation of the programmed orientation laws that do not contain singular states for two pairs of gyrodynes is possible due to the use of the kinematic

Abstract In the paper, the requirements for aircraft guidance methods are considered. It is noted that the existing methods of optimization of linear control systems based mainly on the minimization of quadratic functionals of quality do not allow providing the set of requirements for interception systems of aerial objects. It is proposed to use new local quadratic-biquadratic quality functionals,

Abstract In the computational experiments on a flow model of a communication and control network, changes in the system’s functional characteristics under destructive effects are studied. The removal of a subset of edges is considered to be critical damage if it results in the absence of connection paths for at least one pair of source-sink nodes. For each case of damage, both the total number of disconnected

Abstract The development of the theory of absolute stability, the theory of bifurcations, the theory of chaos, theory of robust control, and new computing technologies has made it possible to take a fresh look at a number of well-known theoretical and practical problems in the analysis of multidimensional control systems, which led to the emergence of the theory of hidden oscillations, which represents

Abstract The height of a building is a basic characteristic needed for analytical services. It can be used to evaluate the population and functional zoning of a region. The analysis of the height structure of urban territories can be useful for understanding the population dynamics. In this paper, a novel method for determining a building’s height from a single-shot Earth remote sensing oblique image

Abstract Cryptography and biometry are important components of contemporary access control systems. Cryptographic systems themselves are highly reliable but they require the exact reproduction of access keys; this cannot be done by humans, while the corresponding devices might be lost or stolen. Biometric data are always with the person; however, they vary: it is impossible to obtain the same feature

Abstract An approach to test the diagnostics of distributed computing systems based on the introduction of redundancy in the system in order to simplify the test construction process and the diagnostic process is investigated. The introduced redundancy is a diagnostic model of the system, which runs in parallel with the main software of the system. For this model, sufficient conditions for controllability

AbstractA constructive solution of the optimal energy-efficient programmed control problem for distributed parameter systems with a given-precision uniform approximation of the space distribution of the controlled variable with respect to the desired state is proposed. The computational algorithm developed below involves a special-form preliminary parametrization procedure for control actions on finite-dimensional

AbstractThe work is devoted to studying the dynamics of unstable oscillating systems (in the form of an inverted pendulum) controlled by the action of a hysteretic type. The results for different types of motion of a suspension point are presented, in particular, for vertical and horizontal motion. A mathematical model of the inverted pendulum with an oscillating suspension is considered. For this

AbstractWe consider the problem of refining the evolving Earth Orientation Parameters (EOP) used during the converting from the inertial coordinate system to the Earth’s coordinate system, including ephemerides computations onboard spacecraft (SC). We discuss the approaches and technologies used to refine these parameters. We propose a concept to refine EOP by ground stations and SC, based on processing

AbstractThe optimal control problem of the random-jump structure of an object under counteraction conditions is considered. The counteracting parties observe any changes in the object’s structure using special indicators that operate with errors. The optimality criterion of the controls is a certain functional of the object’s state. One of the opponents seeks to minimize this criterion, whereas the

AbstractWe propose a method for obtaining the implication conditions of the properties of a mathematical model of a system from the structurally close properties of a model of another system related to the former one by cross-model linking objects. This method is applicable to various models and their properties. Any implication conditions for the properties are not required to be given a priori. They

AbstractIn this study, we consider a flat rotation of an electric rectilinear rod controlled by an electric drive, loaded at the free end by a point mass. The problem is to optimally control the voltage in the motor’s winding, which transfers the system to the final state with the damping of the elastic vibrations. A generalized formulation of the equations of the rod’s state and a method for approximating

AbstractThe identification of attempts to substitute images plays an important role in protecting biometric systems (authorization in mobile devices, access control systems for premises, terminals with automatic access by face recognition, etc.). This study presents a new method for detecting falsified images based on processing the multimodal data from a camera. A new neural network architecture is

AbstractA hybrid simulation method applied for developing and testing the process of spacecraft berthing (i.e., docking using a space manipulator) is described. In this method, the manipulator’s dynamics and the relative motion of the objects to be docked are computed using a mathematical model and the docking units are real-life copies. The relative motion of these units is reproduced on a 6-degrees

AbstractThe problem of the functional diagnosis of critical systems, described by a nondeterministic finite state machine model, is considered. A new method for solving the problem is proposed, the distinguishing feature of which is the use of the mathematical apparatus of the algebra’s covers. The features and advantages of the method are illustrated by the example of the problem of monitoring the

AbstractWe consider a mathematical model of a horizontal-axis wind-energy unit in which Savonius rotors are used instead of classical blades. The Magnus force formed due to the autorotation of Savonius rotors creates a momentum supporting the rotation of the central turbine shaft. The main difference of this study from earlier investigations in this area is as follows: we take into account the variation

AbstractThe problem of compiling an acceptable multiprocessor schedule without interruptions and switching is considered for the case when the set of partial relations is specified on the set of operations, all operations have a common deadline, and the distribution of tasks on the processors is specified. At some undetermined times, requests may be made to perform additional, higher priority operations

AbstractTracking the motion of objects in video sequences is an important problem of computer vision that has a wide range of applications. The key points in tracking systems is the detection of an object and, if it was detected repeatedly, its reidentification. A fast correctly working tracking system that uses a number of cameras is described. The system includes detection and segmentation of objects

AbstractIt is shown that due to the peculiarities of the detection zone of an airborne radar station of a long-range radar detection system operating in the pulse-Doppler mode, there are hidden trajectories in which airborne objects (AOs) are not detected by the airborne radar station. Solutions to differential equations describing hidden trajectories are found. The hidden trajectories are classified

AbstractFormulas are obtained that make it possible to realize a predetermined motion of a rigid body with respect to its center of mass in a coordinate system with this center and translating axes. It is shown that there are two significantly different cases. In the first case, the point should always be in a certain plane, which not only makes it possible to implement any required movement from this

AbstractThe paper considers operations on k-homogeneous hypergraphs and finding the vectors of the degrees of the vertices of the result of the operation without constructing the hypergraphs’ results themselves. It is proposed to express vectors from certain operations in terms of a vector from the intersection of two homogeneous hypergraphs. This will speed up the calculations and simplify the construction

AbstractThe use of deployment policies with the development of virtual machines (VMs) allows improving the reliability of applications, reducing the latency in interactions between VMs, and simplifying the administration at data processing centers. Setting VM deployment policies places additional requirements on physical resources. This can result in reduced physical resource utilization and a lower

AbstractMethods and algorithms for determining the orbit of a space vehicle onboard using the measurements of global navigation satellite (NS) systems are considered. Methods and algorithms for obtaining radio navigation measurements in the case of the highly dynamic orbital motion are described. The celestial mechanics interpretation of measurements is given. Algorithms for the three-phase processing

AbstractThe problem of detecting objects in images is solved by training the classifier by the descriptors constructed based on the local Radon transform of the gradient field of the image. The space of the Radon transform is considered as the Hough space accumulator in which projections are constructed. The set of local projections forms a descriptor of the region related to the object that is a generalization

AbstractThe problem of searching for and holding the International Space Station in a position of dynamic equilibrium is considered. The equilibrium orientation of the International Space Station (ISS) is determined by the superposition of gravitational, gyroscopic, and aerodynamic moments acting on it. The system of powered gyroscopes installed on the space station plays the role of effectors in this

AbstractThe problem of managing the dynamic infrastructure of complex systems in the context of targeted cyber attacks is considered. An approach to management is proposed, consisting of finding a self-regulation scenario in the minimum time that eliminates the destructive impact by finding an alternative route for implementing the objective function. It is proposed to characterize the process of self-regulation

AbstractThe motion of an artificial Earth satellite in different variants of the solar orientation mode in the low Earth orbit is investigated. The satellite is close in shape to a cylinder with two solar arrays. Nonrotating solar arrays are located symmetrically relative to it along the satellite’s longitudinal axis. In the solar mode normal to the plane of the satellite’s solar arrays invariably

AbstractThe paper presents the results of scheme-parametric optimization by the criterion of electric consumption of autonomous one-rock electrohydraulic steering actuators (SAs) with a negative overlap of throttle ports of their electrohydraulic amplifiers (EHAs) by spool plungers. The optimization rests on the results of investigating the effects of structural and regulatory parameters of EHAs on

AbstractThe problem of the exact bounded control of transverse vibrations of a thin plate is considered. Control actions are applied to the boundary of the plate, which fills a certain bounded domain on the plane. The purpose of the control is to completely stop oscillations in a finite time period.