Mathematical Modeling and Analysis of Thermostressed State of Bimetallic Plate Under Electromagnetic Action in the Mode with Pulse Modulated Signal

The thermostressed state of a bimetallic plate under the electromagnetic action in the mode with pulse modulated signal (MPMS) at the resonant frequencies of the electromagnetic field is studied. There are established the critical values of the parameters of the electromagnetic action at which the bimetallic plate loses its load-carrying ability as a constituent element.

Algorithm development for finding the minimum level of noise immunity of an onboard electrical complex during control tests

An algorithm for finding the minimum level of noise immunity of the onboard electrical complex during control tests is developed in this paper. The expression is obtained for the frequency tuning step of a narrow-band electromagnetic action and an algorithm is developed that compared with the standard to more accurately find the minimum level of noise immunity of ETS.

ASSESSMENT OF NOISE AND ELECTROMAGNETIC EFFECTS OF TRAFFIC FLOW ON RESIDENTIAL BUILDINGS AT THE DESIGN, CONSTRUCTION AND EXPLOITATION OF ACOUSTIC SCREENS

The main purpose of this paper is to study the causes and development of estimation procedure, as well as forecasting of an increase of traffic stream noise and electromagnetic action on residential buildings due to reduction in the efficiency of panels during their life cycle. Field observation which confirmed a sufficient similarity of the dynamics of reducing the acoustic panel efficiency with the procedure estimates were carried out in the process. The article also estimates risks of accidents and forecasting of cost increases that negatively affect the efficiency of AP. Recommendations for each of the stages of the panel life cycle of were developed and given according to the results of the study.

Mathematical simulation of the motion law of differential mortar pump piston intended for construction mix

The paper is dedicated to the creation of a differential mortar pump with electromagnetic action for pumping finishingmaterial, which is not sensitive to electric energy gaps, and which is at the same time convenient, easy to use, reliable andeconomical in operation. The paper presents the mathematical model of the working process dynamics of a differentialmortar pump with electromagnetic action, which will allow to study common patterns of pumping processes in the pump inthe whole, to solve general problems on their calculation and design, to set and solve problems of reliability control,connected with high-frequency pressure oscillations, the problems of structural optimization and optimal design of all itselements. The control system of a pumping unit with vector controlled asynchronous electric drive is proposed on the basis ofthe concept of inverse dynamics problems in combination with the minimization of local functionality of instantaneousenergy magnitudes, which ensures high-quality pressure regulation under the conditions of parametric perturbations activityand has acceptable energy indices.