Cascade control of «smart home» heating

The article discusses the issues of implementing the conversion of input signals of «smart» sensors for automation of the heating system, an algorithm for calculating the parameters of measuring circuits with a nonlinear element and an operational amplifier is developed. The issues of modeling cascade control of residential building heating systems are investigated. The results of the analysis and selection of parameters of the cascade control system are presented. An algorithm implementing the operation of a virtual object is given. The structures of management of residential building objects are proposed. The method of calculating the adjustment of the controller for cascade control is given. For the heating system stand, the procedure for setting the parameters of the process of PID control of the coolant temperature is considered. The results confirming the achievability of the proposed structural changes are obtained. The results of experimental studies are presented.

R&D of the PERT basic model for project planning

The guiding principles of project implementation are planning. The discrepancy in time, cost, and quality between the plan and the actual implementation of the project requires management decisions supported by an analysis of the optimization of the duration of the project and the search for reserves to reduce the implementation time. For this purpose, a basic PERT model for a specific project was developed, early and late deadlines for work, time reserves, and a critical path were calculated. This work is aimed at applying methods of evaluation and analysis of projects to find optimal solutions and control the efficiency of time and costs in project planning, by varying the work on the project and the executors of the work. The results of this study showed that there are quite large time reserves for works 5-7, 7-9, 6-9, etc., which makes it possible to redistribute work between performers and allows you to vary performers during the implementation of several projects simultaneously.

Simulation of oscillatory processes in the MVSTUDIUM package

The mathematical model and algorithms of oscillatory movements are considered. Various factors affecting the oscillatory process are considered. Oscillatory movements are constructed in the MVSTUDIUM modeling environment. The schemes of three computer models demonstrating oscillatory processes are determined: a model of a pendulum with a non-movable suspension point, a model of a pushing pendulum with friction force and a model of a breaking pendulum. Classes are being built to execute models with embedded properties, as well as with the ability to export the created classes to other models, and embed classes created by the program developer into the model. Creation of 2D and 3D models of oscillatory processes, an experiment behavior map and a virtual stand.

Simulation of the electroerosion treatment process using neural networks

The paper provides formalization and construction of a model of the process of electrical discharge machining. When describing the process, a T-shaped equivalent circuit containing an RLC circuit was used. Determine the transfer function of the proposed substitution scheme. Also, a task is formulated and an algorithm for neural network parametric identification of a T-shaped equivalent circuit is proposed. The problem is posed and an algorithm is developed for neural network parametric identification of the equivalent circuit with a computational experiment, the formation of training samples on its basis, and the subsequent training of dynamic and static neural networks used in the identification problem. The process was simulated in Simulink, Matlab package. Acceptable coincidence of the calculated data with the experimental ones showed that the proposed model of electrical discharge machining reflects real electromagnetic processes occurring in the interelectrode gap.

Environmental measures to reduce air pollution on the territory of a specialized facility

A detailed narrowly focused survey was carried out on one of the three zones of the technological infrastructure of a specialized facility - a hangar for aircraft (LA). A general list of pollutants (SV) released into the atmosphere at the 2nd site - the hangar of a special facility was established. Generators – installations and constructs of polluting components on a specific area of stationary and mobile type, which operate at a special facility, are fixed in the selected sectors. In accordance with the nature of the released components and the nature of the emission source (stationary or mobile type), the 2nd site is divided into 4 sectors. The measurement by sectors was implemented and the concentration of emissions was calculated according to the recommended regulatory acts of the Russian Federation. Indications of the concentration of a number of substances above the regulated MPC for 2 sectors of the 2nd site for the energy and test site of the special facility have been established. In connection with the recorded results, techniques and procedures of organizational and technical regulations that contribute to minimizing the accumulation of pollutants (gases) of functioning aircraft engines are analyzed and recommended. A method of attenuation of near-Earth smoke at an interval of up to two meters from the surface where aircraft engines operate is proposed based on the analysis of environmental measures at specialized facilities. The method is based on a variation in the orientation of the outflow of gas flows from functioning aircraft engines during launch, taxiing, takeoff, landing, and passage of an aircraft (VS) along the airfield track.

Analysis of the condition of apartment buildings

These technical conditions of multi-apartment buildings are a huge digital array for making important management decisions both within the boundaries of individual territories of the municipality, and for planning budget expenditures within the municipality, the subject of the federation and the country as a whole. Aspects of the formation of data on apartment buildings in various information systems are considered. The basics of ensuring the reliability of the presented data are considered. It is noted in the work that for many years, during the transition from a planned economy to a market economy, the requirements of technical regulations and normative documents for the maintenance and operation of apartment buildings are not fully complied with by the operating organizations. The deadlines for replacing systems and equipment that have worked out the deadline are not met. It is noted that federal legislators and the Government of the Russian Federation have not determined a general procedure for monitoring the technical condition of apartment buildings and have not formed a general approach to assessing their technical condition, the obligation of owners of premises of apartment buildings to finance these works, their frequency has not been determined. It was revealed that the data obtained during the monitoring of the technical condition of apartment buildings combined in federal and regional information systems would be an objective marker in the formation of state and municipal programs in the field of reducing the housing stock unsuitable for living. financing of monitoring.

Development of the technology of systems on a chip for a modern electronic component base ECB

Without the creation of Russian technology for designing SoC, it is impossible to provide a modern level of VLSI development, both for defense and civil applications. This is in line with global development trends. Nevertheless, it is necessary to highlight only those essential processes that are most consistent with Russian realities and can help in solving specific problems of the defense industry and the economy as a whole at the lowest cost and in the shortest possible time. The most important element of the implementation of SoC technology is the organization of a single sign-on to locate the production of microcircuits based on this technology. This will allow to drastically reduce costs, to certify the system of complex functional blocks, to increase the reliability and sustainability of developments. Even in organizational terms, this will allow an organized firm (conditionally - Silicon Gate) to be included as a certified chip manufacturer in any contracts with MO. The article discusses the structuring of programs for the development of domestic technology of SoC systems on a chip, the coordination of the SoC area of developments and complex functional blocks, as well as their information support.

Development of automation tools for managing exchange rates based on nonlinear dynamics methods

Within the framework of this work, the tasks of studying the subject area of exchange rate management software, comparative analysis of several software solutions were solved. To implement the server part of the PM KB, the Python programming language was chosen. The Django framework formed the basis of the server part of the PM UKB. To implement the client, tools such as the Jinja template engine for collecting HTML pages, the Bootstrap framework for working with a grid and styles were used, and the JS language was used to create interactivity. The paper also presents a general scheme of the algorithm in a graphical form. Further in the article, the program blocks of authentication, data unloading, switching on and off the exchange, collecting modified data, adding the control data block to the point exchange rate management page, updating data in the database, updating data of specific rates are considered.

Determination of control actions and energy consumption during programmed motion of the manipulator

The paper presents the modeling of the solution to one of the problems of mechanics - the automated control of the manipulator used in the forestry industry for moving operations at various stages of the technological process. A unified model has been developed that allows generating control actions and energy consumption of the object under study. As a result of solving the problem, a system of equations was obtained for determining the control moment and control force, which allow the manipulator to be set in motion, as well as to determine the energy consumption for the implementation of the program motion, in which the load moves at a given speed from point a to point b along a straight line inclined at a given angle to the horizon. The proposed algorithm is generalized for solving computer-aided design problems and is a simulation experiment. The software solution is implemented in two forms. In the first module, the database is filled with the initial metric, angular and physical and mathematical characteristics of the manipulator. In the second, according to the unified model described above, the indicators are calculated that are necessary for the movement of the object and characterize the dynamics of movement, as well as the necessary energy consumption for performing the operations performed. The possibility of converting the calculated values from the database into an MS Excel table is provided.

Circuit engineering methods for ensuring ECB resistance to the effects of heavy charged particles

The paper considers circuit engineering methods for protecting the electronic component base from the effects of heavy charged particles. One of the main methods is to increase the capacity of the device, which leads to an increase in the capacity of diffusion regions and a decrease in the frequency of single events. The structure of a capacitor is shown, which is connected to various nodes of the circuit to increase the sensitivity of the capacitance of the node. The article focuses on the method of using active RC circuits in the feedback circuit of a storage device cell. The advantages and disadvantages of the methods of using a storage device cell with internal redundancy are noted. The paper shows that the use of circuit engineering methods will provide the required level of fault and fault tolerance to the effects of heavy charged particles.