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A SynApp program is developed for studying the algorithms of processing data obtained by arrays with a synthesized aperture in passive sonar devices. Various synthesis algorithms are compared, and the best algorithm is chosen on the basis of particular criteria. Inspection of program operation with signals obtained by a real array demonstrates the efficiency of synthesis with the use of the ETAM algorithm. Application of synthesis in passive sonar devices is proved to reduce the array aperture without deterioration of the bearing quality. The effect of the changes in the array subaperture used for synthesis and the size of the synthesized aperture (number of synthesis steps) on the bearing quality is studied.

An algorithm for controlling the torque or the rotation velocity of the rotor of an induction (asynchronous) motor with vector control of flux linkages is proposed. Stability of the control loops of the torque and rotor rotation velocity is analyzed, and results of simulating the operation of the proposed algorithms are described.

The properties of adaptive control systems synthesized by the velocity vector method are considered. It is shown that the systems are characterized by different time-scale dynamics because they contain a reference model, a fast adaptor, and a derivative estimation filter. A study is made of the effect of the parameters of the reference model on the properties of systems with additive adjustment and additive and parameter adjustments. The system parameters having the most significant effect on the control are determined and recommendations are given for the choice of these parameters with the constraints on the control actions taken into account.

A precise method based on a special procedure of successive parametrization of control actions is proposed to solve boundary-value optimal control problems for distributed-parameter systems with the tolerances for deviations from the required final state of the controlled object specified in the uniform metric. The method is used to solve the time optimal control problem for an innovative technology of induction heating of massive bodies rotating in a direct current magnetic field.

An optimization approach to finding the parameters of reduced-order controllers is proposed. It is shown that numerical estimation of the location of the characteristic roots in the complex plane allows the set of the roots to be divided into parts, in each of which, real coordinates for the roots are introduced. The resulting structure of the root simplex is similar to a geometrical complex. The structure of the regions and boundaries of the simplex is represented by graphs and digraphs. The roots are moved to the desired region by minimization of the same estimate of the objective function depending on the controller parameters. Critical regions are represented by reduced graphs.

A data processing method based on one variant of ternary logic, which allows considering unreliable and incomplete information, is presented. An example of practical application of the proposed method in the development of the Novosibirsk subway supervisory train control system is given.

The technical means and software of an MTSR-40 measuring and computing complex for recording fast processes are described. The functions and operating modes of this complex are considered.

The hodograph of the normalized moment of the energetic spectrum of a gradient image is analyzed. It is shown that transformation of the matrix form of the hodograph equation to diagonal form gives analytical expressions for the invariant characteristics of the image description-the principal spectral moments of gradient images. In this case, rotation of the coordinate system until its axes coincide with the eigenvector directions reduces the hodograph equation to the canonical form. An analysis of the initial equations, in rotation, yields invariant characteristics of the singular points of the hodograph. Subsets of invariant description characteristics for gradient images of different orders constitute a hierarchical system of invariant description characteristics of the initial image.

A quasioptimal method of antenna array control in information systems is proposed based on optimizing the integral parameters of an array in controlling the complex current amplitudes in some of the array radiators. Numerical calculations were performed which confirmed the validity of the analytical estimates. An estimate was obtained for the choice of the arrangement of  uncontrolled elements of an antenna array that minimizes the decrease in the energy parameters of  the antenna array with the quasioptimal control.

An approach to particle system processing on a GPU is discussed. Balancing of CPU and GPU loads is described in detail. Original approaches aimed at reducing the data flow from the system memory to the video memory are proposed. A comparison between the proposed GPU-based approach and the classical CPU-based particle system animation is given.