Large-format laser range

New principle of large format scanning laser range construction for mobile object navigation realized on the basis of piezoelectric drive of laser beam inclination control has been suggested. Optimal drive parameters and laws of controlling range laser beam scanning were determined. Limiting angular format by azimuth coordinate (the most important one for navigation of water and ground mobile objects) up to hemisphere size is 180о. The proposed principle is approved in adaptive television automatic system, means of control and diagnostics of laser beam state at stochastic influenc

The Joule-Thomson effect and the non-equilibrium thermodynamics of sliding nano-contact

Dynamical systems, having the space-timevarying behavior, takes place in the range of processes. Especially interesting are those which affect the structure and properties complex materials during its formation because of thermal communication between the different parts of the system. One of the most important features of the study is the temperature behavior in the contact area under sliding interaction. This behavior results from the large contribution of the heat capacity to the entropy. We investigate the influence of the Joule-Thomson effect on the behavior and thermal characteristics of contact area formed by debris and lubricant between the sliding surfaces when they are brought into contact with one another in commutator-and-brush assembly as an example. The model reflecting the influence of the change in the third body temperature on the material properties, geometry of the debris and the surrounding environment is proposed. The result shows the strong correlations between Joule-Thomson effect and mechanical fluctuations of the wear particles that are responsible for the size of the contact area

Model of on-line control for the smart object by communication technologies

Based on analysis of opportunities of usage existing models, methods and techniques for on-line monitoring and control of unmanned dynamic objects, a mathematical model of remote estimation of distance to wire-controlled unmanned mobile object is proposed. The presence of model and techniques of remote estimation of distance to wirecontrolled unmanned object increases the reliability of control for exclusion of critical situations in the strict radio counteraction conditions and powerful electromagnetic jamming setting during control

Model of on-line control for the smart object by communication technologies

Based on analysis of opportunities of usage existing models, methods and techniques for on-line monitoring and control of unmanned dynamic objects, a mathematical model of remote estimation of distance to wire-controlled unmanned mobile object is proposed. The presence of model and techniques of remote estimation of distance to wirecontrolled unmanned object increases the reliability of control for exclusion of critical situations in the strict radio counteraction conditions and powerful electromagnetic jamming setting during control

On the asymptotic normality of the number of false solutions of a system of nonlinear random Boolean equations

The theorem on a normal limit (n → ∞) distribution of the number of false solutions of a system of nonlinear Boolean equations with independent random coefficients is proved. In particular, we assume that each equation has coefficients that take value 1 with probability that varies in some neighborhood of the point 1/2; the system has a solution with the number of ones equals ρ(n), ρ(n) → ∞ as n → ∞. The proof is constructed on the check of auxiliary statement conditions which in turn generalizes one well-known result

Analysis of high-tech methods of illegal remote computer data access

The analysis of high-tech methods of committing crimes in the sphere of computer information has been performed. The crimes were practically committed from remote computers. Virtual traces left at realisation of such methods are revealed. Specific proposals in investigation and prevention of the given type computer entry are developed

A Batch Feeder for Inhomogeneous Bulk Materials

The work includes the mechanical analysis of mechanical feeders and batchers that find application in various technological processes and industrial fields. Feeders are usually classified according to their design features into two groups: conveyor-type feeders and non-conveyor feeders. Batchers are used to batch solid bulk materials. Less frequently, they are used for liquids. In terms of a batching method, they are divided into volumetric and weighting batchers. Weighting batchers do not provide for sufficient batching accuracy. Automatic weighting batchers include a mass controlling sensor and systems for automatic material feed and automatic mass discharge control. In terms of operating principle, batchers are divided into gravitational batchers and batchers with forced feed of material using conveyors and pumps. Improved consumption of raw materials, decreased loss of materials, ease of use in automatic control systems of industrial facilities allows increasing the quality of technological processes and improve labor conditions. The batch feeder suggested by the authors is a volumetric batcher that has no comparable counterparts among conveyor-type feeders and allows solving the problem of targeted feeding of bulk material batches increasing reliability and hermeticity of the device

Bending of a circular plate with a radial crack whose flanks are in contact

Bending of the circle isotropic plate with radial crack with contact shores is investigated. For want of solving of a problem was considered, that the shores of a crack come in contact on the upper basis on all it’s length. A solving of a problem constructed with use of methods of the theory of functions of a complex variable and complex potentials. The system of singular integral equations was untied numerically with the help of method of mechanical quadratures. The numerical analysis of a problem is conducted, because of which constructed graphic dependence of contact pressure and moments intensity factor and strain intensity factor

Model of on-line control for the smart object by communication technologies

Based on analysis of opportunities of usage existing models, methods and techniques for on-line monitoring and control of unmanned dynamic objects, a mathematical model of remote estimation of distance to wire-controlled unmanned mobile object is proposed. The presence of model and techniques of remote estimation of distance to wire-controlled unmanned object increases the reliability of control for exclusion of critical situations in the strict radio counteraction conditions and powerful electromagnetic jamming setting during control