Semi-active vibration absorbers for the high-rise objects

To determine the optimal parameters of the dynamic vibration absorber (DVA), a complete multi-parameter model of the dynamics of machines and structures is required. A model with two degrees of freedom is unacceptable for a sufficiently precise calculation with sufficient accuracy of the oscillations of the design, and thus for an adequate description of its dynamic characteristics. Therefore, in practice, it is necessary to investigate the design using a complex model.

Analytical methods of optimization of operational parameters of the main gas pipelines (gas mains)

An analytical model for the operation of the main gas pipeline is proposed.  The results of the investigation of the domain of optimality by analytical methods are presented.  The developed software is tested on real data.  Comparative results of modeling and optimization by numerical and analytical methods are presented.

The Procedure of Optimization of Linear Periodically Time-variable Circuits in an Environment Udf Maopcsy

The paper presents the procedure of optimization of linear periodically time-variable circuits based on the calculation of circuit parametric transfer functions by the frequency symbolic method. The parametric transfer function is approximated according to the frequency symbolic method by the Fourier trigonometric polynomial, in which some or all parameters of circuit elements are given by symbols. These parameters act as variables while performing procedures mentioned.

Design plan travel route on the basis of conduct colony of bees

In the article the modified paradigm of bee colonies for hiking trails through the solution of combinatorial problems on graphs: the selection in the column independent subset of vertices of maximum pairing in column coloring graph, click in the selection box are studied. Based on the analysis of behavioral models of self colony of bees, methods and mechanisms of formation of the ideas are developed, the formation of combinatorial problems on graphs is discussed. Methods of forming search space are studied. Position in the search space is represented as an ordered list.

Structural and Kinematic Synthesis of the 1-DOF Eight-Bar Walking Mechanism with Revolute Kinematic Pairs

Problem statement. The use of existing and the most widespread drives (wheeled and caterpillar one) is sometimes limited by complicated operational conditions while moving on rough terrain. The mentioned drives require a relatively flat surface to be operated effectively. A rocky or a hilly terrain imposes the demand of the use of alternative types of drives, in particular, walking ones.

Macromodelling as an approach for short-term load forecasting of electric power system objects

In the paper methods of construction of mathematical models intended for the power consumption forecasting are discussed. Alternative method of forecasting of defined object using discrete macromodels which allows to conduct quantative analysis of characteristics of the electric energy consumption in the future using known previous data obtained during the field test is proposed.

Optimization of Structure of Sorting Vibratory Separators

The problem of substantiation of operational efficiency of vibratory separators designed on the basis of vibratory hopper feeders with electromagnetic vibrations exciters and with conic working bowls is considered in the article. The complex of factors influencing the accuracy and productiveness of separation of coins and disk-shaped products on two or more fractions is overviewed. New models of structures for the effective solution of separation problems are proposed.

Syntez kulachkovoho pryvodnoho mekhanizmu rolykovoi formuvalnoi ustanovky z optymalnym rezhymom rukhu za pryskorenniam chetverto[Synthesis of the cam drive mechanism of the roller molding construction with optimum mode by acceleration of the fourth order]

For the purpose of increase in reliability and durability of roller forming installation the optimum mode of back and forth motion of the forming cart on acceleration of the fourth order is calculated. Kinematic characteristics of the forming cart at the optimum mode of back and forth motion on acceleration of the fourth order are calculated.