Analyzing of heating elements' location of distributed control objects
At the present stage of development of automatic control systems the issue of maintaining of a given temperature regime appears. The authors have developed a method of synthesis of nonlinear regulators to stabilize a control object temperature field (published by Ilyushin, Y., Pervukhin, D., Afanasieva, O., Klavdiev, A., & Kolesnichenko, S. (2014). The Methods of the Synthesis of the Nonlinear Regulators for the Distributed One-Dimension Control Objects. Modern Applied Science, 9(2), 42–61. http://dx.doi.org/10.5539/mas.v9n2p42). The resulting controller allows creating an adaptive regulated system to maintain a temperature field - to do that, it is necessary to analyze a control system in order to find an optimal number of heating elements to stabilize a temperature field. In this there have been article obtained functions for calculating an optimal number of heating elements of silicon-carbide heaters, used for a temperature treatment of various kinds of products (bread baking, metal hardening, etc.). The article describes a method to calculate the number of heating elements of n-dimensional control objects. A check of an adequacy of a mathematical model, obtained within a synthesis process is provided as well. Obtained hodographs of the system demonstrate a stability of running processes and therefore an adequacy of results.
Discharge of a copper-magnesium galvanic cell in the presence of a weak electromagnetic field
The effect of weak periodic electromagnetic pulses with a repetition rate of 250 kHz on the discharge of a copper-magnesium galvanic cell is studied experimentally. Comparative characteristics of the electrochemical process and scanning electron microscopy images of electrode reaction products are presented.
Background resonant acoustic control of heterophase processes
The theoretical principles of controlled self-organization of open nonequilibrium condensed systems in heterogeneous processes are described. The control is performed by means of a background acoustic field, which organizes the phase trajectories at the frequency band immanent in the medium. The model concepts are confirmed by experiments on the effect of weak acoustic fields generated by pulsed electric fields in the frequency range from 10 to 8000 kHz on physicochemical processes in various media and the mechanical properties of metallic materials. There is an optimal frequency of the effect on the process rates and the properties of the materials obtained. The shortening of the melting-crystallization time and phase-transition memory of irradiated samples, which persist for several recrystallization cycles, is found and interpreted theoretically.