The purpose and objectives of this work is to develop methods of planning the path of the mobile autonomous robots operating in environments with unknown location of obstacles. The result of the article is vague planner travel path of autonomous mobile robots for three-dimensional space (3D environments). The results differ from known analogues structure proposed planner, consisting of two interconnected parts, designed for use in horizontal and vertical planes, context-sensitive coordination method "simple" behavior of the mobile robot, a set of rules governing the method of prevention "jam" in the obstacles.

Keywords: Quad copter, management, uncertainty, decision making, fuzzy logic

The mixed finite element method has advantages over classical formulations of Lagrange and Castigliano, and ensures high precision and smoothness approximate solutions for strains and stresses.
In practice, using the mixed finite element method is limited by high size of linear equation systems, which leads to significant increasing time costs.
Using the orthogonal finite functions for approximating of unknowns leads to generation of sparse linear systems with a special structure.
That system can be simplified during solution.
This article proposes the algorithm of modificated Gaussian elimination for preliminary transformation an extended matrix of linear system.
This algorithm underlies software complex, which includes LISTSOLVER, the author's solver.
Confirmed the efficiency of created solver in compare with common-type solver.

Keywords: mixed finite element method, sparse linear systems, orthogonal finite functions, Gaussian elimination

The main maintenance of a  results of calculation of a thermointense condition of beams depending on various ways of an attachment to the basis - jammed in the basis, with absolutely hard sealing-off on end faces and absence of any communications at end faces is considered. The analysis shows, that the more age of "blocks-communications", the more they possess rigidity. It means, that they are less pliable, and sizes of pressure in the settlement block are close to pressure in the block with the jammed end faces.  

Keywords: Termointense, concrete, block, communication, support, suppleness, pinched, temperature, movement

Re-equipment of existing enterprises is comprehensive intensification of production, increase production capacity, production and improvement of its quality while ensuring productivity growth and job cuts to reduce material capacity and cost of production, saving of material and energy resources, improvement of other technical and economic performance of the company in General

Keywords: Modernization, технологическоя line, production, ceramic brick, operating enterprise

Belt conveyors are widely used in factories of building materials. They are used to transport bulk and General cargo on the short, medium and long расстояния.Установка the working body of the screw conveyor brushes allows to increase capacity of the conveyor by eliminating the accumulation of the material to be transported inside the gutter.

Keywords: Operating enterprise, belt and screw conveyors, building materials.

The task of identification of defects in rods with different variants of fastening. In the basis of lies method parameter identification based on an analysis of the frequencies and parameters of natural modes of the structure. Built model of the rod design has defects fluctuations, using finite element of the complex 

Keywords: Defect, damage, rod, the oscillations of the cantilever rod

Defined criteria for identification of defect parameters, on the basis of the analysis of the different modes of own fluctuations, with the use of finite element modal calculation console corpulent model of a rod with a single defect. Developed finite element model of a universal complex . Considered corpulent (3-d) model on the basis of 3D finite element Solid92. When solving the problem considered on 26 oscillation modes depending on the size of the defect and its location.

Keywords: Damaged, defective, swing, cantilever, frequency

Information about authors of issue №4 (2013)

Keywords: authors

Cracking of reinforced-concrete elements with holes is examined. Comparison of theoretical and experiment moments of crack’s  formation during torsion, and during intensive torsion with twist. Formula for practical calculations of cracking of reinforced-concrete elements with holes during torsion and formula for estimate of cracking of reinforced-concrete elements with holes during intensive torsion with twist is suggested.

Keywords: Crack, twist, torsion, reinforced-concrete, elements, hole, beam

Information about authors of issue №4 (2011)

Keywords: authors

Information about authors of issue №4 (2010)

Keywords: authors